This just happened last night so Im putting the question out there so I can look at it this Holiday weekend. 86GT, but I have the 2nd gen 88 headlight motors. The passenger side decided it didn't want to go up. I just put these in last summer and I replaced the common plastic bushings when I put them in. Whats my most likely issue. Thanks
When you turn on the lights, does the motor run but won't lift the light? Or, can you start to raise the light manually by turning the knob a little, then activate the switch and make it go up by itself? Does it go down by itself if it's raised? Answers to these may help in diagnosis responses.
Looked at this today. Plugged passenger side into driver side and motor works perfect. Did voltage test at plug. Not getting 12 volts at the passenger side plug. Module must be bad. There's nothing else it could be. Odd that the driver side still works though.
The module acts as an Isolation Relay. Each motor is on a separate part of the module, otherwise when resistance builds on one, the other would stop, too, even though it might not be completely up or down.
I checked the wires and there are no raw spots, pinches, or crimps. There is no power to the plug on the passenger side when motor is unplugged and we turn on the lights. Passenger motor works perfectly on driver side. So I think that eliminates all of those objections.