radio harness voltage

foonanas

New member
I tried searching but could not find what I am looking for. Does anyone have a list of the voltages that should be on the wire harness for the radio? I have an 88 V6. I would like to know what the voltage is supposed to be for each wire with the ignition on and off..

I have a short somewhere and what I think is a leak under the dash board. I am off for the next few days and I plan to tear the compete dash off to try and find this issue..
 
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The only places you should read voltage are:

Across red and black (12-14v) at all times.

Across yellow and black (12-14v) with ignition on or at 'acc'.

All other lines are outputs from the radio.
 
How about the same info for the power window and power locks for the drivers side door. I am having some strange electrical problems..
 
At the window motors the polarity reverses depending on the position of the switch.
For example, on the drivers side window motor, the blue wire should be at +12V when the switch is in the up position while the blue/green wire will have 0V (both referenced to ground. When you move the switch to the Down position the polarity of each wire changes to the opposite. When the switch is in the center Off position, both are at 0V.
 

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