I gone through the search on wiper problems but didn't see my specific problem. I cannot shut off my wipers, as long as the car in the on position they will run. Pulled the switch out of the dashboard, and hanging free, not touching the dash the wipers will turn off with the switch. As soon as I went to put the switch back in with the ignition on, I got a spark from the switch to the dash and the wipers started running. Any thoughts. Thanks.

Sounds like bad internals in the switch - the only thing that turns the wipers on and selects speeds is grounding through the switch body to the instrument panel, and opening the ground to shut them off (the wiper motor has power any time the key is on, and grounding activates it). :thumbsup:

Agree with John,..I've had some strange things happen with my wipers,..intermitant,..the surprise one wipe,.. the no wipers, and the can't turn'm off wipers.

A new switch fixed everything. But I couldn't find one at my local parts houses,..had to order thru Rick's...$30.

Good luck!

Thanks guys. This was driving me nuts. Time to buy another switch.

I checked out the switch and it seems to be working properly. I've ordered a new one anyway. While I'm waiting, I wonder if the wiper motor could have an internal grounding issue, since the switch works at one speed only when it's not grounded to the dashboard. I've checked the ground on the firewall and it seems to be good. Seems like I'm already getting a ground situation prior to the switch being installed in the dashboard. I'm waiting for my Service manuals to arrive as I've only had the car for one week.

Just fixed the wipers on my 69. Saw the same problem with them running contantly at high speed. Check the wiring. The dark blue wire (for washer) hooked up to the black wire contact on the motor will cause this.

Checked the wiring, checks ok at switch, switch works like it's supposed to.
I have three terminals on top of the wiper motor. Looking towards the windshield the two terminals on the right are yellow first, then light blue in one plug. The third terminal a single terminal lug is wired directly to one of the mounting screws on the motor. I've found the dark blue and the light blue wires from the switch in there respective terminals on the wiper motor and washer. Where should the black wire from the switch terminate at? Again, sorry for all the questions but I'm on day five of what was supposed to be a three day delivery of my service manual.

Here's a pic. The single black wire is the bottom one, kinda hard to see
http://home.comcast.net/~jimragtop/wipe.jpg
Another possibility is, there is a mechanism in the wiper motor which keeps it on low speed until it returns to park. Perhaps this thingy is staying "on"?

Besides the fact that my wiper motor is turned almost 90 degrees from your picture. The wiper motor is actually laying flat at a 6 o clock position. Is the black wire attached to the loom returning to the switch? Mine is just going to the top mounting screw, it seems like it's being used as a ground terminal. The washer motor is attached but all the piping is gone, it's not really being used. I'm wondering if any of mine is hooked up or mounted correctly. Where is the black wire from the dash switch hooked up to? I've only owned the car for a week, and my calls to the previous owner are going unanswered.

The yellow wire is hot all the time.
The black and light blue ones are high and low speed, don't recall which is which, dark blue is wash. These are all "true" when grounded by the switch.
Pic is my 68, wiper motor is identical to 67 except for the shape of the part that goes thru the firewall, mounting orientation may be different on 67, don't know. Wiring is the same all 3 years.

So your black wire thats hooked on the terminal is coming directly from the switch? Mine is just going to ground.

i believe it's called a "park switch" and it only comes with a new motor. it is responsable for "parking" the wipers in the down position when the motor is turned off. if it is bad, they will not park, they will just keep running. David

So your black wire thats hooked on the terminal is coming directly from the switch? Mine is just going to ground.

I never actually tracked it past the firewall, but no, it is not grounded. If it was, the wiper motor would always be on. My black wire goes into the engine harness and itno the bulkhead connector.

You might disconnect it, see if and where the motor stops, then see if either speed will work from the switch with the balck wire disconnected.

Then all you gotta do is find the other end. The harness is only 18" from there to the bulkhead connector, it couldn't have gone too far.

Yeah,..but there's only place in the designed circuit that can be disengaged and that's at the switch,..which isn't doing it's job.

Just because the switch feels ok when you activate it, doesn't mean it's good.

Another opinion,..

When I turn the wipers off (when not grounded to the dash) they go into the park mode and shut off.
I think I found the black wire from the switch. As memory serves me correct
from last night. The wire from the switch is actually going to a firewall ground
behind the wiper motor. Then I have the smaller black jumper wire coming from the ground behind the wiper motor to the terminal on the motor. When I get home from work, I,ll switch the black switch wire to the terminal like it's supposed to be. Then I'll make up a ground wire to go from the wiper motor case to the firewall. Thank's guy's I think I might be getting close.

I've tested the switch for continuity, and it checks out. I ordered a new switch anyway. Once I get all the wiring in order, it will either be the switch or something wrong with the motor. I'm keeping my fingers crossed and still waiting for my service manual.

there should be a small metal strap riveted to the motor base, and running under one of the attaching screw heads. This should be the only ground the motor needs. You can see it in the pic, kinda an l shaped "line" coming off the top mounting screw right by the yellow and light blue wires..

Good news. I found the problem after all this mess. It was as simple as the black wire had been pinched on the motor mounting screw, causing the switch to be in constant ground :clonk: . Hooked up a new terminal to the black wire and the wipers work perfectly. Man, something as simple as this. Best part was all your help. I can't thank you enough. I know the wiper circuit backwards and forwards now. :beers: