View Full Version : Bench testing wiper motor

05-11-2007, 10:56 AM
I'm working on a 4 wire wiper motor for a 63 Cruiser. I've taken it apart, greased and re-assemble it. It runs when I hot wire it to a battery setting on the bench. How do I hook it up to check for the "park" spot that the wiper arm stops at each time I stop putting power too it? red, yellow, black and ? color wires on it.

05-11-2007, 02:45 PM
You've pretty well got to have it in the car to verify where the blades park.

Tom Bredehoft
'53 Commander Coupe
'60 Lark VI
'05 Legacy Ltd Wagon
All three Indiana built OD cars

05-11-2007, 04:23 PM
Both the dash switch AND the motor have to be grounded, in order for the park to work. At least, they do for a Hawk or Avanti.

Bob Johnstone

05-11-2007, 09:29 PM

I have been through this problem thoroughly, because I bought a wiper motor that came out of a '63 Lark. I then obtained a Lark wiper switch and found a website that detailed the wiring. You can do the same if you want to bench test the motor. Note that these 4-wire motors are completely different in their electrical circuits than the older 3-wire wiper motors.

Pay particular attention to my second post in this thread:


1955 1/2 Ton Pickup
[i]The Red-Headed Amazon
Deep in the heart of Texas

05-12-2007, 06:43 PM
If you're testing it on the bench, you'll not have the drag of the blades to stop it in the park mode, but you'll be able to HEAR the motor momentarily cut out as it passes the park spot on the rotary switch contacts.

Miscreant adrift in
the BerStuda Triangle

1957 Transtar 1/2ton
1960 Larkvertible V8
1958 Provincial wagon
1953 Commander coupe