Serious Explorations Ford Explorer and Ranger Message Board
#1 Resource for Ford Explorer and Ranger Owners - By Enthusiasts, for Enthusiasts.


Ford Explorer Generation Guide

EF Swag Store 2015 Ford Explorer Forums Elite Membership Chat Room My Posts Reviews Explorer Photo Gallery
Go Back   Ford Explorer and Ranger Forums "Serious Explorations" > Ford Explorer Ranger Repair - Troubleshooting - Modifications & Detailing Forums > 2002 - 2005 Explorer Mountaineer 3rd Generation > Stock 2002 - 2005 Explorers

Notices

Stock 2002 - 2005 Explorers Questions related to non-modified 2002 - 2005 Explorers and Mountaineers. Problem solving, maintenance, TSB, service bulletins, owner reviews, specifications. Sport Trac and Sport use the 1995-2001 forum.

Parasitic drain - GEM?

Reply
 
Thread Tools
Old 11-11-2008, 04:51 PM   #1
rps944
Brick, NJ
2002 XLT
 
Join Date: Oct 2002
Posts: 5

Vehicle Specs

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
(Original Poster)
Question Parasitic drain - GEM?

Hi all,
I'm in search of an opinion/advice. Vehicle in question is 2002 Explorer XLT w/tow package, early build.

After several days of jumpstarting, I have determined that the truck has a 250ma current drain, key off, etc. Factory specs say no more than 50ma is typical. Chasing down the culprit, it seems that the components behind fuse 2.20 (5A) are to blame. Pulling the fuse reduces the drain to 35ma. This fuse supplies the GEM (pin 1, constant hot), the driver's seat module, and the memory setting (truck has power seats but not position memory option). Disconnecting the power seat doesn't impact the drain. Can a GEM be "bad" and still function? I.e., everything works and nothing is flakey or intermittent. Or am I down the wrong rabbit hole altogether?

With F2.20 removed, everything seems to be working except the 4x4 high and low. (I also disconnected the 4x4 control module before removing F2.20 but that wasn't impacting the drain either). So, it seems that the GEM (or part of it) is drawing about 200ma in the key-off/removed position. Besides deactivating the 4x4, is there anything else I need to consider - like are the airbags still working? Also, before I started the current drain troubleshooting, I ran a full set of OBD-II (Ford-specific) and everything checked OK - no codes in memory or pending.

I know that GEM codes/self-test requires an NGS, or similar, scan tool. Can I replace the GEM myself and "reprogram" it on my own should I need/decide to? Or can I leave this as-is and, if needed, put the fuse back in when I need 4x4? (Which is rare.) Or should I just take it to Ford?

As always, advice/opinions/whatever is very welcome! Thanks!!
Bob

Last edited by rps944; 11-11-2008 at 05:20 PM. Reason: One more detail
rps944 is offline   Reply With Quote
( Join the Elite Explorers )

For only $20 per year you can become an Elite Explorer. Explorer Forum has probably saved you that much already, and will continue to save you money as you learn how to diagnose and fix problems yourself, and learn what modifications really work without having to experiment on your own. Elite Explorer members can change the forum "styles" to see less ads, no green underlined links, and many other benefits such as being able to store 1000 Private Messages, upload photo attachments directly to your posts and more. Join the Elite Explorers today.


Old 11-12-2008, 08:10 AM   #2
rrgone
Tucson, AZ
'02 XLT
 
Join Date: Jul 2006
Posts: 701

Vehicle Specs

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
I does sound like the GEM has failed, or possibly a chaffed wire somewhere downstream of f2.20. I don't think anyone in here has replaced a GEM because so few Gen 3s have 'em. You might try asking over in the Gen 2 forum, maybe someone over there knows about changing the GEM. Good luck, post back when you get it sorted out.
rrgone is offline   Reply With Quote
Old 11-12-2008, 10:39 AM   #3
rps944
Brick, NJ
2002 XLT
 
Join Date: Oct 2002
Posts: 5

Vehicle Specs

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
(Original Poster)
Arrow Thanks for the input

I appreciate your input. Before I get too crazy, I need to verify it is the GEM pulling the current. I didn't pull the GEM harness to measure the voltage/current at pin 1 yet - that'll wait for the weekend. And thanks for reminding me it could be as simple as a chafed wire. I tend to lose the forest through the trees at time.

I also need to verify that the GEM has some control over the 4x4 which I think is not kicking in (4x4 L/H indicators light but don't notice a differrence). I need to put the fuse back in and recheck. If it's still not going into 4x4 I need to see if that's related to the current drain (possibly pulling through the GEM?) or I have a separate problem.

I also want to see if the truck's battery/charging system cooperates the next few days. My wife said the truck cranked over this morning but a little slow at first. Since I killed the battery yesterday while testing and had to jump it, and only did a few local miles, I'm not certain the battery got much of a charge. Plus, the temp is dropping into the 30s overnight now - not really cold enough to kill a battery but enough to make a difference on a weak one.

I'll keep the forum posted as to my progress/frustration

Last edited by rps944; 11-12-2008 at 10:44 AM. Reason: Forgot something
rps944 is offline   Reply With Quote
Reply

Suggest this thread to friends:


Tags
gem, obd-ii, parasitic drain


Join the "Elite Explorers" Today!



Search Explorer Forum


Top of Page

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 09:56 AM.



US Flag
We Support Our Troops!

Explore the site!


Copyright 2014 - 1996 Rick Horwitz Photography



Ford Motor Company is not involved in the management of this site in any way.



All tips on this site are for use at your own risk and discretion.

Modifying the suspension on any vehicle will cause changes to its handling characteristics.



Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.