Dantana

Can someone please illustrate (in print or drawings) how the windshield wiper circuit is suppose to work? I can't find in my AIM. My wipers work when I push the button in but when I move the switch to position "on" I get nothing. I think I have a bad connection at the motor (yellow wire) but am not sure how the vacuum system plays into this.

I am thinking about migrating to a wiper system from something else that is all electric. Any suggestions on vehicles to remove the wiper motor, etc from and what I should be sure to change out besides the wiper motor?

Thanks,
Dan

Easy Mike

What year?

GATOR454

Below is the wiper circuit with an intermittent add on. Ignore the add on (dark lines) and you have the circuit.



no vacuum 73+ (it was only used to open the wiper door)

GATOR454

Constant power at motor (yellow wire)
Wiper is activated by grounding @ LT Blue
Hi/Low is determined if Blk/Wht goes to ground (if grounded then high, if not then low)

pushing the switch grounds the mist pump (dk. Blue) and the windshield wipers (Lt. Blue). So your circuit is good. must be a bad switch.

GATOR454

In case anyone was wondering if the intermittent thing worked with 69-72 here is the diagram. door stays open.

Dantana

'74 coupe w/ AC

Dantana

Perfect diagrams, thanks a lot for those Gator.

7T1vette

The connector on the wiper switch can be installed upside-down. That will cause it to function 'oddly' or not at all. Easy to check.

Easy Mike

Okay. You got me. Is there intermittent wiper action on the 68-72 models?

I have a couple of wiper speeds on my 68, but no intermittent.

I have intermittent on my 80.

...Roger...

If your wipers work by pushing in it sounds like you have lost the ground for the wiper switch. Is your dash bezel broken ?

GATOR454

No intermittent until 78 I think. A couple of years back I added an aftermarket intermittent circuit to my wipers. I posted a how to on another forum and had requests for diagrams for earlier years. I posted the 73-77 diagram to answer Dantana's question (just erase the dark lines and you have the un-altered circuit). Then added the other diagram just in case someone wanted it.

pic of the install:


68's just have to be a little different, don't they?


funny thing about this circuit is because of the park function built into the wiper motor it's (wipe-wipe-pause-wipe-wipe-pause...)

Dantana, did you find the problem? 7T1vette's suggestion of a reversed connection at the switch made sense.