Hi guys. Most likely the problem is in the radio. Once those problems are repaired, they're repaired permanently. Sounds like you have a cassette-only or cd-only radio.
In the gray plug, measure the voltage on the two wires at the end away from the keyway. The first one is usually pink. It must have 12 volts all the time. The second one will be red, possibly with a stripe. It has 12 volts when the ignition switch is turned on. If the display lights up when you turn on the ignition switch, the red wire is okay. If the clock keeps the correct time, the pink memory wire is okay.
You can verify everything else is okay by jumping the red wire to the end wire in the black plug away from its keyway. That's the switched wire for an amp and / or power antenna. Jumping those wires might cause the radio to turn on too, depending on where the problem is located within the radio.
Also be sure the ground strap is bolted to the back of the radio or there is a wire clipped to it. There is no other ground wire in the two plugs. If that strap or wire is missing, the radio might work by getting grounded through the antenna cable, but that's a very poor ground for the power circuits. Typically when the ground is missing, the radio will be totally dead and the back lights won't turn on with the dash lights either.
If you have the cd player without cassette, that radio is built by Alpine. They are rather involved taking apart but that problem also is repaired permanently once it's been done. A common clue is the cd player does have sound. Only the radio has no sound. At the same time if you press either "Seek" button, you'll see the display advance very slowly, about one digit every three or four seconds. There is a different problem that affects only the FM and another one that causes intermittent display fading out. I address all of those when a dealer ships me a radio to fix. Also volume controls that respond poorly and front panel switches that perform the wrong function or don't work at all. I can be more specific if you tell me the model number from the sticker on top.
If you have a cd / cassette combo radio, that was not original in the Jeep in '95 but it will plug in and work fine if you can find one with the oddball mounting ears. Those are built by Mitsubishi and are REAL high quality. That mounting style was only used from '93 to '95 and only in the Jeep line, then again in the late '90s in the Avenger, but those had an orange display and back lighting.
Wednesday, October 19th, 2011 AT 6:45 AM