1966 chevelle wiper moter

what is the diff btw the 3 wire and the 4 wire other then the 3 wire cost alot more?? could i just get a 4 wire? my harness is all cut up so i could make new pig tails just need to know whats the difference

any help would be great thanks!


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Doc here,

IF your talking about your 66 Chevelle..looks to be a TWO wire system, not 3 or 4..(see schematic)

If it's something else..could be anything.

Attached Thumbnails

 

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Don't 66s have two speed wipers? That diagram only shows single speed.

Doc here,

Don't remember WHEN they went one to two speed..But that is the right diagram for a line produced car in 66..

On / Off seems to be the choice of the day back then though...

He can tell by looking at his switch, If it is on, low/Hi then it's a 3 wire , 2 speed system.

Doc

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You are correct about the Chevelle having a one-speed wiper system. I assumed it was the same as my 66 442, which has two-speed, though the motor comes as either a 3 wire or 4 wire.