BCM?

[fyr145]

My guess is the alternator is not charging the battery. Test alternator for output amperage. Charge battery first.

[giant h2]

Originally Posted by fyr145

My guess is the alternator is not charging the battery. Test alternator for output amperage. Charge battery first.

it was tested with replaced (new) battery in January and was fine. Also it charges the battery after driving around for a bit.

[giant h2]

New Data: If I pull the SEO ACCY fuse with the Engine off key out (which has a wire from the back up cam wrapped around it) and re-seat the fuse the battery light icon on dash goes out, the PRNDL goes out and the radio goes off. Start the car and turn it off and all hell breaks loose again?

Thought it could be the ignition switch? So I wiggled the key and no joy. Interesting, if I touch the rear wiper sw or the windshield wiper sw with the door closed the battery icon goes out and the retained assy power plays the radio and dash cluster lights until door opens. If I have the door open and touch either wiper sw, all power goes off with key out. What does all this mean?

[HUMTECH]

Did you remove the back up cam wire or leave it in place when you reinstalled the fuse? If something is wrong with the camera it could power that circuit which is tied directly to the TBC ACCY fuse which in turn can be powering up the bcm

[HUMTECH]

If you did remove it and problem is still there. Remove rear wiper fuse and test system. If its still a problem remove ws wiper fuse and check it. Both those circuits run off the same power bus in the ip fuse panel so anyone of them could cause an electrical backfeed

[giant h2]

Originally Posted by HUMTECH

If you did remove it and problem is still there. Remove rear wiper fuse and test system. If its still a problem remove ws wiper fuse and check it. Both those circuits run off the same power bus in the ip fuse panel so anyone of them could cause an electrical backfeed

I removed the back up cam wire and the prob was still there with or without it. I did not mess with wiper fuses. I only tried the wiper switches to see if the ignition may have thought it was in the assy power position with the key out. I did notice that when I jump started the dead truck this morning, as soon as the engine started the WS wipers cycled once? Did not think anything of it at the time.

What can this be????

[HUMTECH]

remove the wiper fuse and see if problem goes away, if it does may have a bad wiper module backfeeding the circuit or a bad switch