Rear Windshield wiper

[Pete_89T2]

Originally Posted by vex

I'll have to check that out. Is that the Body electrical book?

Yup, that's the body electrical section. I've got the '89 FSM, big orange binder type FSM, which is one of the few editions where they didn't have a separate book for the schematics & wiring diagrams. Sections S and T in my edition. BTW, the color codes given in the FSM didn't even match the ones in my '89T2, nor did the shape of the plug shown, but it's easy enough to figure out - if the motor doesn't run, just reverse polarity.

My rear wiper doesn't work either, but it's because it's not getting a full 12VDC at the motor terminals - it's a worn out wiper switch relay in my case. I used one of those matching T-style connectors I've kept from my old engine harness to substitute for the wiper motor connector, so that I could connect that to my DVM and see what voltage the motor would see with the hatch closed at the end of the circuit line. Was getting only about 2VDC with the wiper switch on the LOW setting, and about 10VDC at HIGH. Motor would barely budge at all in the LOW setting, worked VERY slowly at HIGH. This problem started for me after I accidently flipped on the rear wiper when it was iced to the glass one snowy day - probably hastened the burning or relay contacts. Fortunately all my front wiper functions are fine, but I need to replace/refurb that wiper switch one of these days.