My 1990 hatch quit working and I am trying to diagnose it to know what parts I need to buy. It has power but nothing seams to work. The trunk light is on and there is 12 volts at the motor on two of the 4 wires.
It doesn't apear to be broken mechanicly.
When I push the activation switch nothing happens. It is in the Up position.

Is there a way to test the motor to see if it is fried?
I replaced the relay and that didn't help, I don't want to just replace parts without knowing if they are good or bad.

Please help if you can.

Randy

 

More information-

The motor is good. I pulled it all apart and was able to run the motor touching the two terminals to 12V. I think that narrows it down to a bad switch or a bad limit reverse switch?

Any ideas on figufring which one is bad? Or am I missing something else?

Thanks

 

top down solutions has the parts you MAY need.thats topdownsolutions.com i had to rebuild/replace EVERY part of my unit and they have good parts at reasonable prices

 

If the hatch is open and will not close, the limit switch may be in the closed position. Quick test is: stick your finger down and touch the switch and see if it reverses (don't worry nothing going to grab you). If that works the problem is solved. Otherwise it is a stripped plastic gear or broken slides which are the only other parts that can break.

For more detailed info, Download the repair procedure from Topdown solution. It is very helpful in understanding how the pull down works and repair instructions.