Found this site and I believe I'm looking at wire 18 24lg as the backup lights. And they for sure come into the cab thru the bulk head.
http://forum.73-87chevytrucks.com/sm...?topic=11766.0
Problem is I loose wire 18 24LG in the cab and can't find it. I thought it would be somewhere in the steering column wording but in not sure.
Anyone know where I can find it in the cab or verify where it is on the bulkbhead?