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Ramfd 04-25-2012 01:11 AM

wiring headache, need help.
so i was intending to tap into the headlight switch more specifically the cargo lamp wire and run it to a relay so i could power my white LED bars in the bed to come on when i turn on the cargo lamps.

well i guess it is a ground switched or something weird cause I could not get the power i needed to the relay. after messing around i dont know for sure what i did, but the cargo lamp will not come on and neither will my fog lights......I checked all fuses and all are good. Could I have burnt the switch up? I really dont know what else to look at.

I have already decided to try and find a switch to wire up in the bed and tap into a hot from the trailer wiring and by pass the whole relay idea from the front. can anybody help please?:4-dontknow:

Kruzer 04-25-2012 01:59 PM

Without looking at the schematic and what/how you tapped into the wiring, it will be a tough one to figure out. The PDC (Power Distribution Center) should actually be a module, and does have some built in protection. It can shut down a circuit if it detects a short. I would return everything back to its original condition and unhook the battery for 15-20 minutes or so and see if this brings you back online. Hopefully you did not actually burn up a circuit in which case the module would have to be replace. As for the headlight switch it is just an input device (not hardwired to your lights), so I doubt it was affected. Don't hold me 100% accountable for this as I'm only going by memory, since I no longer have dealer connect access. Good luck.

Ramfd 04-25-2012 02:40 PM

Ok great, I will try to reset thIs afternoon. Thanks. Could there be a breaker under the dash somewhere tO reset?

Kruzer 04-25-2012 03:18 PM

No circuit breakers under the dash that I am aware of...

APSTRAM 04-25-2012 04:05 PM

This is a link to wiring diagrams that might help.

GTyankee 04-25-2012 04:25 PM

If you have not used the wiring diagram before
Pick the part that you want to work with
Then click on the page number

Many people just look at the page & think that there is no wiring schematic there

Good Luck

Ramfd 04-25-2012 10:59 PM

well i tried the battery disconnect and no luck, I really dont know where to go from here. Where is the PDM? I will hae to look at replacing it I guess. may be check some relays under the hood again.

Kruzer 04-25-2012 11:08 PM

The PDC or TIPM is where the fuses are under the hood, that regtangular box with all the wires coming out of it. Now I guess your next step is a scan tool to check for any codes.

Ramfd 04-26-2012 12:00 AM

yea thanks right after I posted that i figured it out. is there a modue under the dash that would be powered by the main one that may be only controls the circuits that are affected? I tried reading the wiring schematics but that is like reading greek to me. I appretiate all the help so far.

Kruzer 04-26-2012 07:19 PM

I don't believe there are any other power modules/fuse centers for your truck. The TIPM pretty much supplies all the power needs for the vehicle. If a circuit is open (damaged) it should have a code related to that circuit in the TIPM.

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