Re: swagon rear wiper - help needed
You can test the unit easily enough if it is off the car - seems odd that it works ok with one type of activation but not another - is this down to the screen being dry (drier) when you test without the rear washer?
The three pin connector is wired earth, switched live, permanent live.
The pin furthest away from the wiper arm shaft is the earth.
(this can be verified by removing the PCB cover and trace the circuit board - the pin that links to a motor supply directly is the earth).
Jumping on the thread I have 2 problems with the rear wiper operation:
1. The rear wiper motor has insufficient torque to operate with the wiper resting on the rear screen (commutator / brushes likely)
2. The rear wiper is only activated by selecting rear wash+wipe - I suspect this is a column switch issue.
I'm expecting the commutator will be burnt out when I prise the motor apart - has anyone cross-matches a 156 SW rear wiper motor to a Fiat equiv?