67 bench test wiper motor all works, high and low speed, installed and only slow works, all new wires, all conected, original switch, what is a test for the switch. Thanks
67 wipers
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Re: 67 wipers
Donald,
The ground for the W/M is at the starter. You may want to verify it's making a good connection. Also, If you get a test light with a good ground and verify power at the wiper motor plug low speed and high speed wires that will tell you if it's at the switch.
There are three wires, I can't remember which two are hot and ground but info is in archives.- Top
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Re: 67 wipers
If memory serves, your copy of the 1967 Chassis Service Manual provides two separate trouble shooting sequences for the WSW motor: (1) on-car, and (2) on-bench. Why not follow the on-car sequence now that you know the motor works as it should on the bench?- Top
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Re: 67 wipers
I think you can test your switch this way. Remove the 3 wire plug from the motor ,turn the wiper switch to high.Using a 12 v testlight connect the alligator clip to 12v (back of alternator is a good place) touch the probe end to the engine block or intake to test the test light-light should light . Touch the probe end to the wiper motor case-light should light. Touch the probe to the light blue wire in the 3 wire connector- the light should NOT
light. If it lights when you touch the lt blue I would say the switch is bad or the lt blue wire is grounded somewhere.
Not sure exactly what might happen but check the yellow and light blue at the 3 wire to be sure they are not reversed in the connector or the entire connector is not installed backwards. ( I know the 3 wire connector has a nub on it but some get cut off.)
edit - lt blue in the 3 wire should be next to the nubLast edited by Roger O.; June 24, 2010, 03:38 PM.- Top
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Re: 67 wipers
Also make sure the switch is grounded in the dash. The switch just grounds the yellow and the lt blue at different times to get the 2 speeds and when both are ungrounded the motor parks , so the switch does rely on being grounded.- Top
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