I purchased all of the parts (motor, arm, blade, switch). The wiring for the console switch already exists in my car. I had to make my own harness that runs from the 4-pin barrel connector near the sunroof motor up through the grommet at the top of the hatch down through the little tube that runs down the side of the hatch and to the motor.
The part I'm confused about is when I bench tested the motor - if I gave 12v+ to pins 53 and 53a the wiper would start wiping back and forth, and when I gave 12v+ just to pin 53a the wiper would return to it's resting position and quit. All good so far, but when I introduce the switch to the circuit bad things happen. Luckily I put some small fuses inline on the two non-ground pins before testing it in the car (I didn't want to fry any wiring in case something wasn't right).
Anyway, with all components installed on the car, when I turn the key and the wiper switch is in the "off" position all is fine. With the key on and the wiper switch in the "on" position the wiper goes back and forth as it should. But with the key on and moving the wiper switch from the "on" position to the "off" position it pops my fuse on pin 53.
The wiring diagram shows that the switch operation is as follows:
- rear wiper switch in "on" position: sends 12v+ to pin 53
- rear wiper switch in "off" position: sends ground to pin 53
So it seems that even though it is grounding pin 53 in the "off" position - that is fine as long as the motor is at rest, but when the motor is in the middle of a "wipe" motion and you turn the switch off, that is when the issue comes up.
Now, I think the motor I got was an early car motor and I installed it on a late model car, but I wouldn't think that would matter as the wiring diagrams for early year cars seem to be identical to the wiring diagrams on late years.
So what I ended up doing to temporarily remedy this was to take the console switch connector apart and move the ground pin (pin #5) to an empty hole so that the switch doesn't make any contact with it. Essentially taking the ground out of the circuit at the switch.
- wiper switch 1.jpg (77.19 KiB) Viewed 1752 times
- wiper switch 2.jpg (143.28 KiB) Viewed 1752 times
With this configuration, the wiper switch works as I would expect it to:
- on makes the wiper start waving back and forth
- off returns it to its proper resting spot and that's where it stays
No blown fuses, no issues.
Just wondering if anyone has any extensive knowledge about these things and could explain why I'm having an issue. Or maybe the motor I bought was bad???
