The small 4 pin plug that used to control the volume, tuner and functions of the stereo was left out of the equation. The only two Ford harness plugs that were used with the PAC unit are the 21 pin and the smaller 10 pin that plugged into the back of the integrated stereo. The clock, compass and thermometer are NOT WORKING but I thought that was supposed to happen with an aftermarket install. My question is what are my options? The PAC unit obviously works somewhat I think because the speakers work, the satellite radio works, the CD player works and I the truck runs and operates like normal. I've been told those radios have had issues from time to time and the radio internals were most always the problem child there. One of the relays or some other part that tells the truck to send 12v to the accessory wires when the key is on must be malfunctioning and they think that is why the factory integrated radio stopped working. The only thing I need to be aware of is that I have to power down the radio when I get out so I don't kill the battery.Ĭrutchfield Tech Support seems to think that if I swap the PAC unit wiring harness and the problem persists that it's an issue with the truck. Everything in the truck works as it should. When I splice the red 12v accessory wire to the yellow battery wire from the PAC harness, the radio works. I did not try swapping out the PAC unit wiring harness, just the small module itself. I was sent a replacement PAC interface but it did not fix the problem. I tried removing the negative battery cable for 15 minutes then reattaching it, turning the key on, then off after about 15 seconds, then on again but it didn't work. The yellow battery wires (constant 12v) for the memory is getting power though. The problem I have is when the PAC module is wired up the Kenwood harness and plugged into the Ford plugs from the stock stereo, I do not get power to the new stereo when the key is on. So I bought an aftermarket Kenwood double DIN from Crutchfield with the recommended PAC unit and the replacement dashboard kit. The clock was blinking (with the correct time), the compass and thermometer worked as usual but that was it. It finally died altogether about two weeks ago. It would refuse to power on for whatever reason then out of nowhere it would come on while I'm driving, or after sitting for a while, whatever. Okay so the factory integrated stereo crapped out a few months ago.
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