All right so the last time we saw the truck it was running, shifting and had brakes!
Instrument cluster mostly working as well.
Nobody in the videos pointed out that the cruise control had been re located, and the arb pump was in place,
lights in the bumper, .... and the truck obviously has driveshafts and more
you guys maybe slippin!
Anyways it has been a long hard few weeks, most of the time was spent on the seats and console install........
Lets check it out
I will start with the instrument cluster:
In order to get a working speedometer I needed to install the Dakota Digital speedometer interface.
Really easy to wire up after you have done a few of these.
Basically Dakota Digital (DD) gets its input speed signal from the VSS in the rear axle. The VSS sensor in the rear end is a reliable place to take a reading.
The VSS wires from the rear axle speed sensor head directly to the 4WABS control module under the hood. This is true for most 98-11 Rangers, Explorers, etc
The ABS module then processes this signal and sends it on to many systems in the truck.
However the speedometer and cruise control use a different signal
The old 2007 PCM from the SOHC engine would have done the speed signal "buffering" for the speedometer and cruise.
Traditionally ford speedometers need to see 8000 pulses per mile, this 05 cluster is no different.
Wiring the Dakota SGI 100BT
I get my rear axle VSS signal + wire at the ABS pump. I only need to run this one wire into the dash
07 ranger the wire is white/black
I soldered a brown wire to the rear axle VSS + and used a pass through from a 05 Ranger to get some wires through the dash cleanly
I needed to run tachometer signal from Holley to the cluster, reverse light feed into the interior and a few others
The Dakota box gets 4 wires total on this truck
1. ACC power on (BLUE
hot in start and run) taken from ignition switch
2. Ground BLACK
chassis ground right near e brake pedal
3. VSS + in (BROWN
from our ABS motor turns to red/white inside near cluster)
4. Buffered VSS signal out (WHITE
direct to 05 cluster, speedometer in and cruise control) This wire is hooked to OUTPUT 3 for our use, explained below
Much time spent finding the perfect mounting location and fabricating mounts for these electronics
This is the perfect place to put this in a late model Ranger, the old fuse box cover, Thanks Ford for keeping this cover even after the fuse box went MIA in 2002. The dakota is adjusted while driving using two buttons on the faceplate, or while idling, and it can also be adjusted via bluetooth with the Dakota app (can be installed on Android stereo/ head unit)
I have already set a few of these up in our trucks. I copied and pasted the setup instructions from another thread:
Now you need to setup your Dakota
box so it will work for us with application 3
referring to the instructions found here: https://www.dakotadigital.com/pdf/sgi-100BT.pdf
Set the Dakota
box to convert a high signal to a low signal (H-L) or application 3
Any signal over 32000 ppm is considered a HIGH signal (for us its 77,760ppm)
Any signal under 32000 is considered a LOW signal (for us the target is 8000ppm)
Application 3 settings seen here:
Set the CAL value to 1.65
Using output 3
will send 1/16 of that value to the black/grey 679 vss+ signal to modules.
The math goes like this:
Figuring out the VSS PPM:
Tire revolutions per mile x ring gear teeth = VSS generated signal to ABS pump
29" tire revolves 720 times in a mile
Our 8.8 ring gear has 108 teeth, so
720 x 108 = 77,760 pulses per mile (ppm)
being sent to the ABS motor from the rear axle VSS
77,760 needs to be factored up so that 1/16 of it is close to the target 8000ppm.
(1/16 of something is the same as saying multiply by 0.0625)
(77,760 x __________ ) x 0.0625 = 8000
77760 x 1.65
128,304 x 0.0625 = 8019 pretty dang close
Can also say it like this:
1/16 of 128,304 = 8019 PPM
That is how we get our CAL value of 1.65
and know we need to use output3
which is 1/16 of that value
This will give us a working speedometer that can be adjusted for larger tires, gearing changes, changes in pressure as you go!!