The year is 90 as I said previously, and fuses are fine. First thing I checked. Yes it's aftermarket and was working before I installed the air fuel ratio gauge. I have constant. I see no fuse for radio. just a spot to plug in wires for extra accessories. I do not have ignition power that powers radio up.
Im still leaning towards fuse, but you should be able to trace that switched power line back to where it goes. It should come from the steering column where the switch is, where it could be the switch or the feed going to the steering column. That should be fused too, and I would suspect that fuse. But I cannot remember what it is called.
Of course that is assuming I understand how the jeep is wired, it may be different. this is where having a wiring diagram would help a lot.
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