Ok, I have the standard wiper motor issue. On an 87 300D.

I have taken the assembly out, and removed the motor, greased up the gears etc. The transmission seems fine now. I took the electric motor out by itself and plugged it back in and is slllloooowww... I can see the issue is with the motor itself or the voltage to it etc.

1. is there a how to on testing the voltage to the motor (to make sure it's not just the crappy switch inside causing my issues)

2. Is there a way to rebuild the motor?

3. If no rebuild, what the best place to buy or get a good replacement?

The electric motor does seem to work in all settings, parks correctly etc, it just seems slow in all those settings. I can take a small video of it's operation if need be.