Car stereo connection help?

Question

I bought wiring harness to connect my insignia IN- MP101 stereo. This wiring harness goes into the car adapter but the other end i have to splice with the stereo wires (since stereo adapter is not compatible with the wiring harness I bought) after connecting when i remove faceplate of stereo one red LED glows. When i replace faceplate nothing works and unit does not power on. Can anybody tell that if its wiring fault or the stereo is bad.

So I have a 94Camry LE 4D sedan. I do have a voltage meter but don't know where to connect the negative of the probe to see if the power is coming to the red wire. Regarding stereo fuses I think that the fuse is fine and not blown away.

Answer 1

It seems you mixed up the power wiring connections, if you give us the vehicle make and year I could send you the wiring code to correctly make the connection.
Make sure the ground is properly attached, for the battery wire turn off the key ignition and check with a voltage tester the only wire that has power, that the "battery wire". Now you need to find the accessory wire, once found the battery wire, turn on the key ignition to accessories and look for the other wire that has power in it. For the ground wire it should be a black one, a little thicker than the speaker wires or you can connect the unit ground wire to a clean bare metal of the chassis.

Answer 2

The first thing to check is the "radio" fuse in the vehicle's fuse box. From the sound if it, the deck is getting constant power but not key-switched power. That means there's no voltage on the red wire behind the deck when the key is turned on.

In some vehicles, there's no accessory power connection in the factory harness and you have to run the red wire to some other switched power source in the vehicle. This is very common in newer GMs. What kind of vehicle do you have?

Answer 3

wiring fault.
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