Blown fuse TBC 2B - Courtesy Lamps/Backup lights

[surffisherman]

The TBC 2B fuse keeps blowing and I cannot figure out the cause. From the electrical schematics that I downloaded from an online library show that the courtesy lamps and backup lamps have separate supply circuits for their lamps. What they have in common is they are controlled by the Body Control Module and the I/P Relay Block. I am an electrician and can troubleshoot most electrical circuits if I have a good set of schematics. Can anyone here provide a good source for this information or recommend a manual to help me?

edit for spelling

 

[brodg]

if you give me the year make and model i can possibly help with a schematic

 

[surffisherman]

Brodg,
Thanks for the offer. It is a 2005 Tahoe LT. It has all the bells and whistles as far as I know. We bought it used last year.
Surffisherman

 

[Old Goat]

Send me your email address and I'll send you some.