Wiper motor

[ronwall83]

'67 230sl. Multi function switch is  broken, the "cap" is broken off with the spring underneath to control the wipers.

I'm trying to figure out if my wiper motor even works?  Is it possible to hot wire it direct to the battery just to test it?  If so, which of the 4 terminals on the motor itself would I alligator clip to just to test it?

This car sat for 30 years.  I finally have it running & driving, but the wipers remain non functioning. Not a huge deal, just annoys me more than anything.  Any help is appreciated!

[Leester]

What you want to hope for is that the windshield wiper transmission is not seized after sitting for so long. But to answer your specific question the tech manual provides useful and responsive information:  https://www.sl113.org/wiki/ChassisBody/Wipers.

A while back I sent my multi-function switch to Sead (search on this board) for repairs and it now works perfectly.

[ronwall83]

Thank you.  I can run the wipers by hand under the dash with no problem. I don't have power on the wiring harness, so there is an issue up the line somewhere.  I'll check #2 fuse & clean up relay contacts.

Thank you for the link. I was on this page on the tech manual and read right past the "testing" link.

[Benz Dr.]

Check that you have a good ground.  Wipers will not work unless all of the wiring is in order.

[lpeterssen]

Ground for wiper motor is on the passenger side fender

[ronwall83]

Thank you. Test light shows good ground on the harness, but no + on any of the holes that pins 1, 4, 3 connect to.