Hi Guys,
I have a 97 F150 Super Cab 4x4 4.6L. I just recently bought this truck as a project to fix up. I've only had it about 6 weeks. Its not on the road so I am working on it when I can. Ever since I brought it home I have had battery troubles. The battery will go dead if it sit for a few days. I can not seem to pin point the problem. I checked the alternator diode and it seems fine. I have about .5 amp draw with the key off. If I pull the audio fuse under the hood it drops to about .35 amp draw. If I pull fuse 22 under the hood with the audio fuse in it drops to about .15 amps. It seems that the 22 fuse is the culprit but I don't know what that fuse is. The manual says its the I/P fuse panel battery lead. I think it feeds the interior fuse panel. I tried to start pulling fuses inside but I could not find the problem. How do you test the GEM module. I would like to check that first maybe the problem? Any suggestions. I did replace the battery also.

 

did you have the battery checked ?

 

Yes I did have the battery checked. It is ok. Some times it drains and sometimes it don't. It could sit for 5 days and start then after only 1 day it might be dead and I mean completely dead.

 

this sounds like a bad ground draining your battery, you can take it up to advance auto and they can tell you if your alternator is charging properly. I would be willing to bet its the ground.

 

Check the Coolant Voltage. Nothing is plug in the accessory/cigar?

Disconnect the Bolted Connector besides the Brake booster

 

I have the same problem, have had this truck 97 ford f150 4.6l for 4 years just started having the dead battery problem. had all fuses pulled, had alternator checked at advanced auto. had new battery put in. had it checked an it was bad so had it replaced and checked. my power windows and radio now keep going in an out or sometime i have power and then none at all within the same time we are riding or driving the truck.

 

Check and clean the grounds

 

what grounds? put on new battery post while changing out the first new battery fire wall ground?

 

This is what you want to check.