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AdvanceTrac Issues

Discussion in 'Stock 2002 - 2005 Explorers' started by mikeutsey, December 23, 2007.

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    1. mikeutsey

      mikeutsey New Member

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      I am having problems with my AdvanceTrac indicator staying illuminatinated at all times. It has been on for 2 days now while driving.

      Does anyone have an idea as to why tis would be happening?

      I have researched the internet and have been unable to come up with a solution. Any help would be greatly appreciated.

      I purchased the extended warranty, but there is a $75 deductable and I wanted to know if anyone know of anytin I can check prior to taking it to dealer.:exp:

      Soory forgot year; 2003 Ford Explorer, Eddie Bauer 4X4, 4.0 V6 with 36K miles
       
      Last edited: December 23, 2007
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    3. Minivek

      Minivek Active Member

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      advancetrac probs 2003 limited v8

      Sorry about that, still used to posting for my 94 ex...


      The truck is a 2003 explorer limited v8. The advance trac light decides to turn on for no known reason and says (advancetrac off) it's happened twice in 8 days. If I turn the engine off, it doesn't come back on for a couple of days. No idea why, however I do have a rumble which has me thinking it might be a front left bearing unit that's going. Also, I have not tried it yet, but maybe its reading different speeds because of low tire pressure, it's been cold here.... Anyways, any thoughts are welcomed.

      Thanks a lot!
       
    4. REDBOAT

      REDBOAT New Member

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      Mine is a 2005 and had a constant on Advtrac message. When I finally got aggrivated with it I took it in to the stealership and all they did was reflash the ABS module and that fixed it.
       
    5. Minivek

      Minivek Active Member

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      Interesting, any codes come out of it?? Or did they just reprogram the abs system??
       
    6. Minivek

      Minivek Active Member

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      Your experiences are appreciated as well as how they happend and how they were fixed.


      Here's an interesting tech article I found about Advance Trac diagnostic stuff.

      http://www.midtownautoservice.net/auto_repair_service/tag/advance-trac/

      (pics are on the web page)

      AUTO REPAIR / CAR REPAIR FORD ADVANCE TRAC SYSTEMS - HOUSTON,TX
      Tuesday, January 15th, 2008

      Staying On Track
      AdvanceTrac RSCBy Glen BeanardYou’ve seen the “Advance Trac” badges on the backs of Explorers and Expeditions, but what is it? Have you ever been asked by your Ford dealer parts department if a vehicle you are working on has “IVD”? What’s IVD? Not all vehicles that are equipped with Advance Trac carry the Advance Trac insignia. Advance Trac is available on many unsuspecting vehicles like the FreeStar, Taurus and even Focus. After 2006, all Explorers and Mountaineers come standard with Advance trac with RSC. 2008 and up Taurus, Taurus X, Edge and these vehicle’s Mercury counterparts come standard with Advance Trac with RSC. A large number of Expeditions and a growing number of E-series and F-series have it as well, and are sporting the RSC versions.The terms Advance Trac and Integrated Vehicle Dynamics (IVD) are different names Ford has given to the same system. Two interchangeable names, one system. IVD is a function of the ABS module. It uses ABS and traction control functions together to help steer the body of the vehicle to match the driver’s demand. IVD systems with only that ability are also referred to as stability assist. Roll Stability Control (RSC) is an IVD system that also aims to limit body roll. If your shop is already capable of performing ABS system repairs, then you are already mostly prepared for Advance Trac faults since it is really just an addition to ABS. Let’s look at how it works and what parts have been added. We’ll look at the individual pieces of the Ford Advance Trac system, then we’ll look at what the ABS module does with these pieces.

      To make this discussion more clear, as well as other technical information you may come across, I want to start off with defining some terms involved with the system. Even though this is all done by the ABS module, there are four separate functions being performed.

      ABS Function: This is the function we’re all aware of that has become commonplace over the last couple of decades. That is, during braking if a wheel stops spinning, the ABS module will release the brake at that wheel by venting hydraulic pressure to it.

      Traction Control Function: Again, a common feature nowadays. During acceleration, if the ABS module sees a wheel spin faster than desired, the ABS module will apply the brake to that wheel and, if needed, also command the PCM to retard ignition timing, induce a misfire, or even shift the trans up a gear to reduce torque at the wheels.

      Stability Assist: The ABS module is monitoring the vehicle’s intended course and comparing it to the measured vehicle’s motion. If the measured vehicle’s motion does not match that of the driver’s intended course, ABS and traction control functions are used to attempt to bring the vehicle’s direction back to what the driver requests. This is a basic IVD system, usually found on passenger cars like Lincoln LS and Focus.

      Roll Stability Control: This is Stability Assist with an added sensor. With RSC, the ABS module is also monitoring a roll rate sensor to determine if the vehicle is entering a roll over situation, and will now use ABS and traction control functions to help prevent that. This is usually on SUVs, trucks and vans. However, Taurus sedan has this in 2008.

      Brake Pressure Transducer
      The brake pressure transducer is a potentiometer-type pressure sensor that usually mounts on the master cylinder and is threaded into place (See BPT photo 1 and BPT photo 2).

      As the fluid pressure in the hydraulic brake system increases, so does the resistance value inside the sensor. As the resistance value changes, so does the calculated psi value PID in the ABS module (See Brake Pressure Transducer).

      Steering Angle Sensor
      The steering angle sensor, also referred to as a steering rate sensor, mounts on the steering shaft behind the dash. It is a dual vane laser optic sensor that sends pulses to the ABS module which represent steering wheel movement (See photo Steering Angle Sensor).

      The steering angle sensor provides information about the direction of steering wheel movement as well as the rate of the movement. The steering angle sensor does not directly provide information about the steering wheel’s position in relation to center. Instead, steering wheel center is a learned value stored in the ABS module’s KAM. Steering wheel center, to the ABS module, is equal to the total number of sensor pulses from lock to lock then divided in half. Once the steering wheel center is learned, then each pulse from the sensor in either direction is an addition or subtraction from the learned center value. As you can see in the two steering wheel sensor data PID shots, anything right of center is a positive degree value and anything left of center is a negative degree value (See Steering turning right and steering turning left).

      The steering wheel center is learned during what is called an “IVD initialization sequence” which will be discussed in more detail later.

      On a model that is optionally equipped with IVD, but may not be equipped on the vehicle you are inspecting, you may find the reluctor for the sensor present, but no sensor mounted there (See Reluctor Without Sensor photo).

      Lateral and Longitudinal Accelerometers and Yaw Rate Sensor
      The lateral accelerometer, longitudinal accelerometer, roll rate and yaw rate sensors all have a similar purpose for different aspects of the vehicle body’s movement. The yaw rate sensor and lateral accelerometer are both present on all models with IVD. They are both three-wire sensors that work by varying their voltage values to the ABS module. The lateral accelerometer measures the lateral G-force (side to side) force on the body of the vehicle in turns. The sensor’s center voltage is idealistically 2.5 volts. Turns to the right increase voltage over 2.5 volts, while turns to the left decrease voltage under 2.5 volts. The yaw rate sensor measures the rotational G-force placed on the body of the vehicle in relation to its center of gravity. This sensor’s center voltage is idealistically 2.5 volts. Turns to the right increase voltage over 2.5 volts, and turns to the left decrease voltage under 2.5 volts. The longitudinal accelerometer measures G-forces in forward and reverse directions. The longitudinal accelerometer is only equipped on four-wheel-drive vehicles. Its purpose is to measure the vehicle response to the automatic engagement of 4×4 during an IVD event.

      On CAN vehicles, the longitudinal accelerometer will be mounted together with the lateral, roll rate and yaw sensor in what is called a sensor cluster. A 2×4 vehicle may still have a sensor cluster, as shown in the picture, but will not have a longitudinal sensor inside of it. A sensor cluster communicates on the CAN network and will have four wires — power, ground, CAN low and CAN high (See Yaw Rate Sensor). On Explorers, you’ll find the yaw/accelerometer sensor mounted on top the drive tunnel buried beneath the center console and some HVAC duct work as seen in the photo.

      Notice the screen captures labeled “Body Roll 1” and “Body Roll 2.” In Body Roll 1, I swerved to the right. In Body Roll 2, I swerved to the left.

      As the body rocked one way then the other, the data PIDs indicated the G-forces created in each direction.

      Roll Rate (shown as ROLLRAT in scanner screen shot) is the measured amount of body rotation in relation to the vehicle’s front-to-rear horizontal axis.

      As for the longitudinal accelerometer (Seen as LONG_ACCEL on this scanner), notice how it behaves in the screen shots labeled “Acceleration 1”, “Acceleration 2” and “Deceleration.”

      As I accelerated, the G-forces applied to the body were reflected as a positive value on the data PID (See Acceleration 1).

      When I let up on the gas pedal, and allowed the vehicle to coast briefly, you can see that the measured G-forces dropped back down to zero as I coasted for a split second while switching from the gas pedal to the brake pedal (See Acceleration 2).

      As I applied the brake to bring the vehicle to a stop, the measured G-forces then moved into a negative value on the scan tool (See Deceleration).

      Active Brake Booster
      The active brake booster is similar to the conventional vacuum brake booster. The difference is, the addition of a two-position brake pedal switch, a brake booster actuator, and a release solenoid. The actuator and release solenoids are so that the ABS module can apply and release vacuum in the brake booster to apply the brakes as it needs to. Doing so in this manner means that during an IVD event, the brake lights may light up to warn the driver behind them. This also means that the brake pedal can move by itself if the module commands it to do so. The module routinely does this as part of a self check at start up. The movement at self check is very slight and may not be noticed unless someone happens to have their foot on the pedal at just the right moment. The brake pedal switch in the booster is present so that the ABS module knows to compensate for the driver’s input on the brake pedal as well. The switch is a two-throw switch — one throw is normally open and the other is normally closed when the brake pedal is released. When the brake pedal is applied, the throws trade off so that the normally open throw closes while the normally closed one opens.

      One of the easiest ways to inspect a vehicle to determine if it is equipped with IVD or not is to inspect the vehicle for the presence of an active brake booster. The easiest way to identify an active brake booster is the rectangular electrical connector that mounts directly in the case of the booster (See Active Brake Booster Photo).

      Some of these boosters will also have an electric actuator, often visible from the outside, like on Expeditions but not on the Sport Trac this photo was taken of, that is controlled by the ABS module for the purpose of applying the brake pedal.

      Putting It All Together
      The ABS module watches the steering angle sensor, yaw rate sensor, wheel speed sensors and the brake input. The module is comparing the driver’s requested steering against the body’s response to that request. If the body does not respond to the driver’s input, or the driver does not respond far enough to the body‘s movement, then the module will apply and release the brakes as needed to use brake-steer to correct the body’s movement. Imagine what would happen if the rear of the vehicle were to begin to slide in a turn and begin to spin the vehicle around. The module would see the driver’s request for steering direction. It would see that the body of the vehicle has suddenly taken an exaggerated course, and it may also notice a sudden speed value change in the rear wheels. It would then “know” that the driver has entered a slide. At that time, it would likely apply the brakes to the wheels on the outside of the turn to help prevent the vehicle from entering a 360 degree spin-around.

      Now, image a similar case, only this time it is the front wheels that break traction and the body of the vehicle is not responding to the driver’s demand to turn. The module would then “know” that the body is moving in a straight line when the driver doesn’t want to go straight. It would then likely apply the brakes to the wheels that are in the inside of the turn to brake-steer the body into the driver’s desired course. Now, imagine a system that also has RSC ability. If the driver enters a turn that is too sharp for the speed, then the ABS module will “know” by watching the roll sensor that the vehicle may be entering a rollover situation. In which case it may take measures to quickly slow the vehicle down.

      To be aware of and compensate for the driver’s brake pedal efforts, the ABS module watches the brake pedal switches in the active brake booster. The module is aware of the combined brake hydraulic pressure created by the driver’s pedal efforts as well as the module’s own brake efforts by watching the brake pressure transducer. If needed, the module can command ignition timing retard and induce misfires as needed to lower engine torque during an IVD or traction control event.

      The module does not just sit there and wait for something to go wrong before it reacts. If it did, then it would likely respond too late. It is constantly measuring the body’s roll-rate in turns. It decides when the vehicle is in a situation where rollover is possible. It will then take needed actions to reduce the engine torque and change brake torque as needed before it is too late. So if you get one of these vehicles in, and the complaint from the customer is that the vehicle bogs, skips and slows down going around curved interstate exits ramps, you really need to know how fast they are moving. It could be a problem with the roll-rate senor or it could just be that the ABS module is trying to save the driver’s life.


      The module does not command IVD events while the vehicle is traveling in reverse, so the MLP sensor is technically a member of the Advance Trac system as well.

      There will be an Advance Trac disable switch located in the vehicle for the driver to deactivate IVD functions. Pressing this switch to deactivate the Advance Trac will not disable the normal ABS functions of the module, only the stability assist and traction control abilities will be disarmed.

      Let’s Fix Something
      This 2002 Lincoln LS had the message “Check Advance Trac” displayed on the odometer as well as a flashing traction control light. The fault code retrieved from the ABS module was a C1277 — Steering Wheel Angle Offset Failure (See LS1).


      The ABS module knows that while driving (VSS signal), the steering wheel should average around its physical center. If the steering wheel’s sensor is averaging more than 15 calculated degrees from center, then something must be wrong because it is not logical for the vehicle to be in a constant steer at highway speeds for long distances (not made for dirt track racers!).

      Pulling up the steering angle sensor’s PID, with the steering wheel at a physical center shows the calculated angle is not within 15 degrees of physical center. In fact, it is at negative 302 degrees, or 302 degrees to the left (See LS2).

      Inspection of the sensor found nothing wrong. It is possible that the steering wheel had been moved with the ABS module powered down… like from a dead battery maybe, or the key just barely turned enough to unlock the steering wheel and not power up the module. The steering angle needed to be retrained. To do this, an IVD initialization sequence needed to be performed. This is when the yaw rate sensor and the steering angle sensor are re-centered.

      After accessing the steering angle sensor recalibration test (See IVD initialization 1 and 2), the tool instructs the technician to not bounce the vehicle and for him to rotate the steering wheel from lock to lock. When retraining the yaw rate and lateral accelerometer, is important to have the vehicle on level ground with no extra weight inside the vehicle… including the technician, so it will be necessary to reach in through an open window to operate the steering wheel. After retraining the steering wheel sensor’s center, the fault code is cleared and ready to return the vehicle to the customer. Anytime one of the following fault codes are cleared:

      * C1277 Steering Wheel Angle 1 and 2 Circuit Failure (Some years and models may list this as “Offset failure”)
      * C1278 Steering Wheel Angle 1 and 2 Signal Fault
      * C1279 Yaw Rate Sensor Circuit Failure
      * C1280 Yaw Rate Sensor Signal Fault
      * C1281 Lateral Accelerometer Circuit Failure
      * C1282 Lateral Accelerometer Signal Fault
      * C1285 Booster Solenoid Circuit Failure
      * C1287 Booster Pedal Force Switch Circuit Failure
      * C1288 Brake Pressure Transducer Input Circuit Failure
      * C1440 Pressure Transducer Input Signal Failure
      * C1516 Roll Rate Signal Fault
      * C1517 Roll Rate Sensor Circuit Fault
      * C1730 Reference Voltage Out of Range (+5 V)
      * C1991 Module Calibration Failure
      * C1996 Active Yaw Control Disabled
      * C2769 Longitudinal Acceleration Sensor Circuit Failure
      * C2770 Longitudinal Acceleration Sensor Signal Fault
      * C2777 Sensor Cluster Bus Failure
      * C2778 Sensor Cluster Power Supply Failure

      The IVD initialization sequence will have to be performed. The ABS module is programmed to know the difference between clearing one of the above codes, and when you are clearing any other code that might be stored in the ABS module. When one of these codes is cleared, it is replaced with a C1998 for “Module Calibration error.” As seen in the screen shot labeled “Calibration Failure.”

      A C1998 is a code that does illuminate the Advance Trac light and will display “Check advance trac” on the message center. Let’s say a customer comes into your shop with an Advance Trac light on with a “check Advance Trac” message on the display. Your tech pulls a fault code C1440. This may be a simple, straight forward pressure transducer replacement. The job itself is very easy. However, when the tech clears the code, a C1998 replaces it and the light and warning message still remain.

      If you do not have a scan tool capable of performing an IVD initialization process, like the OE Ford tool, then you will have to outsource the job. As you know, this can be a sticky situation to be in. To answer this need, you’ll find that alternative scan tool makers are stepping up and adding this function to their tool (See IVD on AE).

      Make sure your scanner will perform this function before you attempt to repair one of these systems. I hope you have enjoyed the information and have the opportunity to profit from it soon.
       
    7. REDBOAT

      REDBOAT New Member

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      They just reprogrammed the ABS system. There were no codes that I know of but there had to be something to lead them into reflashing it?
       
    8. tcore83

      tcore83 New Member

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      On my 05 when I turn the key of it will chimes and says "Check Advance Trac" on the message center. Any ideas as to what this is?


      2005 Explorer 4.0L
      72,059 Miles
       
    9. cyress

      cyress Member

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      Hey guys,

      I have a question for you. I have the 2004 Ford Explorer Limited 4.6L v8 4x4 with the options of 4x4 auto, 4x4 high, 4x4 low and with the advance trac. Do i need this on in the summer time, meaning the advance trac button? Does it burn more fuel to have that traction control on?
       
    10. easy2no

      easy2no New Member

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      This is the technical Service Bulletin issued by Ford on this problem... It may or may-not pertain to you... Check it out...


      TSB 06-11-11

      06/12/06

      ADVANCE TRAC WARNING/CHIME WHEN KEY IS TURNED OFF

      FORD:
      2004-2005 Explorer

      LINCOLN:
      2004-2005 Aviator

      MERCURY:
      2004-2005 Mountaineer

      ISSUE
      Some 2004-2005 Explorer 4dr/Mountaineer/Aviator vehicles may experience an intermittent advance trac warning message (CHECK ADVTRAC), and a warning chime when the ignition key is cycled to the off position.

      ACTION
      Follow the Service Procedure to correct the condition.

      SERVICE PROCEDURE

      If the concern is verified, replace the instrument cluster per Workshop Manual, Section 413 with a new part from the Cluster Service Center. The new instrument cluster's software prevents network timing errors from enabling a chime during a CHECK ADVTRAC event.




      Parts Block

      WARRANTY STATUS: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage

      OPERATION DESCRIPTION TIME

      061111A 2004-2005 Explorer, 0.9 Hr.
      Mountaineer, Aviator:
      Replace The Instrument
      Cluster (Do Not Use With
      10838A)
      DEALER CODING
      CONDITION
      BASIC PART NO. CODE
      2C219 42
       
    11. cyress

      cyress Member

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      Thank you so much. There is nothing wrong yet with mine...hopefully stays that way. I just wanted to know if I take it off, will it save on gas?
       
    12. jrford

      jrford Well-Known Member

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      it only works when the roads are slippery so most of the time its in 2wd. lead footing it in the rain or snow and kicking it on you might lose 1 mpg. Mine is AWD so its always on, and i get about 15mpg city 18mpg highway. About the same as the AdvTrac guys.
       
    13. resq302

      resq302 Member

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      I just happened to get a situation similar to the above. Can anyone help me. My wifes 05 Explorer Limited with the V-8 had the Check Advancetrac message come on in the instrument cluster. Prior to the message coming on, it beeps that the Advancetrac is off. Ive pressed the advancetrac button on the console and nothing happens. Ive also looked through the factory service manauls and it shows nothing in there about this system unless I am looking in the wrong spot. Id rather try and fix it myself instead of getting raped at going to the dealership. Can anyone point me in the right direction as to what to look for or what to test first?

      Prior to this message, I had to replace the multifunction switch (directional switch, wiper switch, etc)

      Thanks,

      Brian
       
    14. rocco123

      rocco123 Active Member

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      Same here. 02 Limited 4.6 V8 on wifes truck. Av Track off light, Av track switch did nothing, & 4wd lo light on. Eng would rev, but wouldnt move in "drive" or reverse. When she started to put it into park, it seems like grinding gears. I just got home and ran it with the same initial results, but after shifting to drive & reverse it wouldn't move & would grind in park, but after going into drive & reverse & pushing the 4wd lo button it started to come around & now works OK. Could be something is wet? Pretty rainy here in Endicott Ny today.

      I have added a ground strap to the tranny a few months ago as we are always getting the avtrack light, & thought it couldn't hurt getting a better ground. This is the 1st time an explorer had stuck us being unable to move.
       
    15. rocco123

      rocco123 Active Member

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      BUMP Anybody have a reasonable explanation for this? Truck was unable to move forward or reverse & could not go into park due to an advanced track (or ABS) issue???
       
    16. MOEINMO

      MOEINMO New Member

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      2004 V8 XLT Grinding

      Miniveck, I am new to the forum and need help with my 04 4x4 V8 Explorer. (all time AWD with a 4x4 hi and 4x4 low button on the dash.) I purchased the truck used with approx. 20k miles. When I test drove the truck I noticed a rubbing or binding sensation when the truck went into a slow turn or if you came to a stop and then tried to take off with the wheels turned. The rubbing is similar to turning a 4x4 vehicle on dry pavement with the 4WD engaged. Since I purchased the truck from a dealer they agreed to repair it before I took it home. Less than a year later the rubbing was back. Before the warranty expired I put the truck back in the shop and had them try to fix it again. When they finally got the truck back to me they said they did not find any mechanical problems but they did make some adjustments to the program that controls the fulltime AWD and the rubbing was no longer present. After approx. 20k miles the truck started to have the same problems. The rubbing or binding has increased some and even happens when you leave a stop sign without the wheels turned at all. Your post caught my attention because of your comments about the attitude of a AWD vehicle when it is on snow vs dry pavement. In the snow my truck does not bing or rub at all! Any ideas or references of a reputable party that could help with this problem?

      Thanks, Moeinmo
       
    17. NickStorey

      NickStorey New Member

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      whats a reflash cost at a ford dealer?

      could they just disable the adv.trac if its not a crucial feature?
       
    18. Tyleryac

      Tyleryac Elite Explorer

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      Can we still take advantage of the TSB even though we are well out of warranty?
       
    19. jp450

      jp450 Active Member

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      Sure. You will pay for it though.
       
    20. Tyleryac

      Tyleryac Elite Explorer

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      Do you know how much that is?
       
    21. jp450

      jp450 Active Member

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      A quick search found a dash cluster for $450. Labor rates vary but I would suspect it to be a 3 hour job. Not sure what the book rate I on it.

      I was out of warranty when I first noticed it. That was 7ish years ago. I have learned to ignore it I guess...
       
      Last edited: September 18, 2014
    22. Tyleryac

      Tyleryac Elite Explorer

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      0
      Trophy Points:
      16
      City, State:
      NJ
      Year and Model:
      2005 Ford Explorer XLT
      For $450 I will be ignoring it.
       

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