Core support wiring harness?

[Matthew Jeschke]

I ran into a road block putting back together my 6.0 build. I had disassembled the core support and refinished it during the engine build. I have been looking at my buddy's 2006 Z71 Silverado, however, short of taking the core support off I cannot figure out the harness.

It is 2001 Z71 Tahoe. I have All Data DIY (factory service manual) and chitons. Been watching radiator swaps, etc on youtube hoping to catch glimpse of where harness runs.

I now have NO CLUE how the wiring headlamp / core support harness attaches to the core support. Any pictures, any tips, any manual snippets, anything would be greatly appreciated.

 

[Matthew Jeschke]

Got it back together with a LOT of trial and error. Now it seems the fog lights and the bottom inner lights don't seem to want to work.

Also there were two gray clips. I cannot figure out what they attached to before. Picture below. They are off the main part of harness going across backside of the core support.

 

[Fless]

Aren't the inner ones your DRLs? Test in daylight (with headlights auto off by sensor), in gear.

 

[Matthew Jeschke]

Oh do you have to be in gear? I had engine off, but on run. Maybe that's my issue. Thanks!

NM... I still didn't turn the engine on, but I put truck to run. All lights would function, cycling through the different settings. However, the DLR still not. Does the engine have to be running for those to turn on?

 

[Fless]

Yes, in gear, if they bulbs and sockets are good they should light up. Those sockets tend to get overheated and scorch.

 

[Matthew Jeschke]

I'm going to order new bulbs. I noticed mine were shot... Had a spare one but it didn't seem to work either. Maybe it was shot too. I'm going to order some LED ones and give them a try. Want to swap out the incandescent anyways they just cause havoc on the connector.

On another note. A couple more things I cannot figure out where they go.

#1 there's two gray clips that are on either side of the cable run that goes across back side on core support. I think they snap the one harness to another? But not sure where? Or which?

#2 I had some star bolts that were for the plastic core support where the headlamps attach. There were two for each side. I cannot figure out which spot they were in?

#3 a bit unrelated, the transmission cooler lines run under the core support. Is there something, a clip perhaps that holds them together. The one seems to rub on the frame rail.