Wiring Harness - Help.

[lmeier]

I have a 2003 Chevrolet Suburban. I want to put an aftermarket video entertainment system in it. I got under the hood and found an un-used 25 Amp circuit that I'd like to tap into inside the firewall. (This way I won't have to try to run a new line through the firewall). The circuit is for a power sunroof. I have no sunroof installed, but it appears to be a good/hot circuit with a fuse installed in the block.

 

Does any one out there have access to find out which color wire comes through the firewall to support the power sunroof?

 

Thanks,

Layne