Can't get radio to work...

[72gmcshorty]

I am trying to install this aftermarket radio but i am getting no power in the harness. The original radio also didn't work. Anyone have a wiring diagram of the radio circuit for a gmc 1992 c1500?

[benoit454]

I got one in my hayes manual i think if I can scan it and post a pic but I'd check fuses, maybe ones blown, and if not you need a test light to check for constant and switched power and then a ground, if nothing else run your own. You can run them out to the firewall and use the junction block under the plastic relay cover for a constant hot and a ground there for ground, or go straight to the battery, then all you need is a switched hot. You could find it in the fuse box or tap into something in the dash maybe.

turned out kinda small but maybe it'll work for ya...

[72gmcshorty]

Thanks for that. The courtesy fuse was blown... radio now works..on to the next problem...

[benoit454]

been there done that, mine was the exact same way, kept blowing the fuse and junk.