Really weird part question

by Roadcaptain S3 Sat Jan 17, 2015 12:58 pm

I just got a big pile of parts from a really cool guy.Among the parts is[what he says is an intermittent wiper switch and motor set up for 73 77 GM cars. I've never even heard of these. He said they are really rare, and I don't doubt it.

Anybody got any info?

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by Joe73 Sat Jan 17, 2015 1:13 pm

Looks like a normal wiper motor but a nice delay switch. Delay wipers would be a nice option.

by Roadcaptain S3 Sat Jan 17, 2015 1:14 pm

I assume it's a three speed (as opposed to two) motor?

by thatfnthing Sat Jan 17, 2015 6:40 pm

Can't speak for the rest of the G3's but delay wipers were available in the Montes from 75-up, though I would hazard a guess the GP's probably offered it too. The motor is the same as the non-delay one except for an additional timing circuit mounted to the front that uses a capacitor -- the dash knob controls how quickly (or not) the capacitor charges, and when it's full it fires the wiper motor for one revolution.

It's a pretty straightforward retrofit, but the dash control is slightly larger than the non-delay one, meaning a larger opening in the dash face, so you're looking at either surgery on the existing dash face, or finding a later model one. When I did mine, though, I got a rebuilt motor from Autozone, but I used a multifunction lever from a Dodge Ram instead of the dash control so it's integrated with the turn signals and hazard lights, so no need to cut the dash face up.

by 77mali Sat Jan 17, 2015 8:02 pm

I think the knob is for speed & you move it either left or right for low & high. Nice find.

by Roadcaptain S3 Sat Jan 17, 2015 8:05 pm

Yep. It mounts in the same spot, switch moves left to right 3 slots and it appears you turn the knob clockwise to control the speed.

by Mcarlo77 Sun Jan 18, 2015 12:17 pm

Intermittent wipers are pretty rare for our cars. Rotary dial switch version even more so. Usually, it's a slide bar. Slide bar style would fit just fine into your '77 dash bezel. Assume the rotary style would too...as I doubt GM provided a special bezel just for those. If he gave you the necessary wiring pigtail that runs out to the wiper motor, it's a fairly easy swap.

Really weird part question 1976la12

by ant7377 Sun Jan 18, 2015 2:26 pm

I have one of those that steve has in the above picture. It goes in the same spot. Im missing one of the knobs on it though. I might put it in one day

by 1973montec Sun Jan 18, 2015 5:25 pm

there should be a place for another 2 prong connector on the motor.

chris has that in his 73 monte

by pila Mon Jan 19, 2015 3:50 am

My service manual for Elcos and Malibu cars shows the delay type wiper wiring etc. It's a nice option for sure....

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