AO Silver Member
Join Date: Mar 2003
As nobody has so far replied to your request pinklesdad, I made a search which may (or may not) give you your information. From an on-line manual it could be shared with the front wiper fuse. The fuse may or may not be burnt out and still the motor not work (with the front motor unaffected). The rear motor will also have an internal circuit breaker to protect it. This will cycle on/off if its stalled or seized for any length of time. It will re-set itself if the cause of the motor's seizing is corrected (provided its not permanently damaged).
Fuse 10 (20amps) in the fuse box under the dashboard
Fuse location column 5 (from the left) - row 2 (down)
If you find your rear wiper is not working the most likely problems (apart from switching or wiring/connector problems) are due to water getting down the output shaft into the linkage/gearbox behind the cover on the rear wiper motor...
1. Seized or stiff internal linkage
2. Contacts contaminated on the worm-wheel connected to the linkage.
In both cases remove the cover un-seize and lubricate the shaft and linkage, clean the contacts. I would not recommend removing the motor case itself which holds the magnets to get to the armature shaft - if that is also seized - probably a new or s/hand motor is needed.
As I say I'm not directly familiar with the 156 sportswagon rear wiper motor, so some other AO member may be able to offer more assistance.
'A business absolutely devoted to service will have only one worry about profits. They will be embarrassingly large.' - Henry Ford.