I am completely flummoxed by the wiring for this motor. Here’s what i have done so far
Completely rebuilt the motor and bench tested it works fine including that the eccentric cam does as it should and the rack moves further in reverse than it does forward. The limit switch checked and works as it should.
Put it into the car and it runs beautifully at both speeds but wont self park…
I read that when switched from slow speed to stop the dash switch reverses the voltage so should make pin 1 on the motor 12v positive, which it does, and pin 5 negative, which it doesn’t, hence it doesn’t reverse and the self park system doesn’t.
Ok now it gets fun, my question is how does this motor get its earth in any position? I cant find an earth return in the wiring diagram. I am using diagram W54955069 in the Jaguar service manual. I have cleaned and tested the dash switch, it works fine, I have the following connections in the switch.
Off pins 5 to7 and 6 to 8
Slow speed 3 to 5 and 4 to 6
High speed 1 to 3 and 2 to 4
It runs in both speeds thus at first sight since to run pin one on the motor needs to be earthed, it looks like the white/ light green on pin 1 gets an earth via the black wire on pin 4 in the plug which in turn connects internally within the limit switch to pin 2 the brown/light green but it in turn only goes to pin 8 on the dash switch and nowhere else. What am I missing? the drawing of the whole switch system shown no earth return that I can find. Is there something missing on the drawing?
Any help appreciated