RSA Not Illuminating (Solved)

[1BadDenali]

Hello Everyone! I've been browsing this site for a while now and recently made an account, as much as Ive browsed I haven't really found an answer to my question, I have a 2005 Yukon XL Denali with Bose audio and the rear seat audio, my rear seat audio controller has never illuminated since I've owned it, I replaced bulbs, verified by running power on the circuit board and all lights illuminated as well as replacing it with a verified working new rear seat audio controller and the new did not illuminated either, im wondering if anyone has a connector diagram so I can see if it's the harness, thank you in advance!

 

[Fless]

Look on www.charm.li

 

[1BadDenali]

Update: pin outs were okay, harness was working properly, appears that both rear seat audio controls had bad circuit boards that will intermittently go out, go figure

 

[Fless]

Could be bad solder joints, considering the use of low- or no-lead solder. Any chance of reviving the boards by reheating the joints and adding some real solder?

 

[1BadDenali]

Could be bad solder joints, considering the use of low- or no-lead solder. Any chance of reviving the boards by reheating the joints and adding some real solder?

Sounds about right, I had to do the same thing to my instrument cluster for the gear display, however I'm not sure which joints I should even resolder as I'm novice at best with PCB soldering

 

[Fless]

I'd probably look at them with a magnifying glass while "adjusting" any components that stick up from the board to see if the joints are loose. Also look for cracked solder joints. On components like this it could be the main pins where the harness connector attaches, but I'm not familiar with that particular circuit board.

If you can determine the actual pin for the lighting from the schematic you may be able to follow the trace to see if there's a break somewhere.

I think these boards are also known to cause parasitic current draw in certain cases.