Good afternoon, I just replaced my headlight motor and gear. The wires on the new motor are colored yellow and blue. I did not get any instructions with it. I assume the yellow wire goes to the yellow wire from the old motor and the blue is ground.
I was able to raise the headlights with a small 12volt battery, but once hooked up the to the wires in the car the lights come on but do not raise or lower.
Any suggestions would be helpful.
Thank you
Mark Brandreth
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Too many unknowns to give an answer.
what was the reason you replaced your motor?
did you manage to replace the motor with the motor plate still installed, or did you remove the entire motor plate?
prior to replacing the motor what was the condition of your lights?
Did they raise and lower correctly?
did the lights turn on and off correctly?
The action of the headlight motor goes through a DPDT relay located inside the cabin and is dependent on proper operation of both of the small limit switches on the motor plate.
Larry
Sounds like you didn’t make any apparent miss steps in the process.
I think I would start by troubleshooting the limit switches.
use this link to get to Panteraplace and the electrical diagram on the headlight motor operation
http://www.panteraplace.com/El...AND%20DOORS%20P2.pdf
Larry
Be sure you have the ignition switch turned on to the accessory location or lights will not move.
Well besides all the above you migth try to CHANGE the wires. The spec has Yellow and Green! The doubble micro switches set up and the wireing is tricky. If I recap correcly if the wires to the motor are in wrong order buckets go up but not down. ..
wind the light in the middle position by hand or by short bat supply directly at the motor. Then apply car wires - changed order..
just a try.
Mat
As we haven’t heard of you successfully solving your problem, I thought I would share yet another troubleshooting approach.
it is possible for a relay solenoid to properly function and still not make an electrical connection. The OEM DPDT relay has a clear cover that is easily removed. This will allow inspection and, if necessary, polishing of the contacts.
do not know the history of your car but if it has sat for sometime then corrosion on the contacts is certainly a possibility.
Larry
Congratulations on sticking with it until you fixed the problem. Glad we could help.
Larry
You should start a new thread in the appropriate topic area to receive attention and suggestions
you will need to include your wheel sizes, locations and current sizes, etc.
Larry
Mark I am glad that you fixed it. As sad had the same problem as wireing is clear per paper spec (
the docu work on Pantera folks is awsome) but a twist in the brain needed.. fixed my 4907 and a 67 GM car same issue..
Mat
As with many other subjects, this one recurs every few years as well. Besides what you went thru to date for a metal bear swap, there is an electrical oddment in the way the headlight gearbox was originally installed. Specifically, that plain DC motor MUST run ungrounded to be reversible. So for unknown reasons, the single, short power wire into the motor case is factory supported at the end of the motor by a special Bakelite support stand-off for a spade lug normally used to ground wires.
Except in the case of a DeTomaso! If the tiny Bakelite insulator/support ever cracks or is damaged, it will attract road moisture and provide a ground path, which can inactivate one side of the reverser arrangement or even blow fuses "for no reason." And your headlights will not come up, or maybe not go back down. I chased this for a whole wet Saturday on our Pantera.
The simple "fix" is to unplug the power wire from the sensitive insulated spade lug and plug the motor wire directly into the power feed from the stock wiring loom. Then well tape or shrink-wrap the connection. Support the loose wire with more tape or a zip-tie around the motor case. Thats it!
