Ask a Car Mechanic and Get Answers to Your Car Questions ASAP
Hi my name is XXXXX XXXXX I'll try my best to help with your vehicle issue.
***Please note: Not every answer I give you is something you were hoping to hear, even though it is true. Such as; (it's more expensive than you wanted to spend, or you will need to have a professional repair shop do the diagnostics and /or repairs due to complexity reasons).
Here is a diagram to the BCM:
1. Do you have any warning lights on when vehicle is running?
2. Do you have a scanner capable of getting into the Body Control Module?
Here is the wiring to the cluster (gem module):
As you can see - when the power goes into the module(s) - it is dispersed FROM it to LOTS of items.
It could be a bad BCM, GEM module, or cluster and will take some time to track everything down.
Do you have a digital multimeter?
Is there ANYTHING else that is not functioning correctly?
Yes, I do have a digital meter. I may have a buddy that has a scanner for the BCM which would probably be the most valuable troubleshooting I could do. I will check with him tomorrow.
1. The warning flashers stay on when the battery is connected. I used to be able to push the theft deterent button to turn off the flashers but this does not work. I would like to permently disconnect the theft deterent but do not know how. Any suggestions on where to start?
2. Is it correct to say since I do not have electric windows I have a BCM instead of a GEM?
3. I have a strong background in electronics and controls troubleshooting. The images you sent will be a big help but since I do not see a way to isolate each CTM output I will probably need a full set of wiring diagrams to get much further. Any further tips or guesses on the most likely items?
I just thought of something - when are you checking the draw from fuse 25?
Here's why I ask:
Most 1995 and newer Ford/Mazda products have modules in them which will remain in "standby" mode for a period of time after the vehicle is shut off. While in this mode, they will draw current which is excessive by established standards for normal current drain. However, after no longer than 1 hour of inactivity (no change in state of door switches, door handle switches, hood switch, trunk/tailgate switch, ignition switch or key-in-ignition switch), they should go to sleep, and total current draw should be less than 50 mA.
Before we head down a wrong path
1. Fully charge the battery
2. Hook up meter as described in next test - make sure it's visible from inside the vehicle
3, Locate and Pull all fuse covers inside vehicle
4. Go to the restroom
5. Then grab a flashlight,
6. Get a good book, (you're going to be inside the truck for a while)
7. You'll need needle nose pliers and perform the following test: