When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
My Great Karnak long distance diagnosis tells me that your actuator has a big leak in the BACK side port. If your door will open only partway, there is a reason. Put a vacuum pump on it (under the large dust boot) and check if it will hold vacuum.
I attached a vacuum line to the rear of the canister and got no door movement. Also with that vacuum line attached to the rear port I felt a vacuum draw at the front port. Does this indicate a vacuum leak?
May sound vague, but possibly. The internal diaphram must go to it's end of travel for any passage of vacuum through it to say it is the problem. If it cannot move to the front or rear and you feel vacuum at the opposite end, it's toast.
Rich
The center hose on the relay down in the fender should have vacuum when car is running .turn wipers off in the down position and pull the hose off the center of the relay and with engine running pull both hoses off the canister that opens the door.use the hose you took off the relay to open and close the door by moving vacuum source from front to rear of the canister.
Wes
I attached a vacuum line to the rear of the canister and got no door movement. Also with that vacuum line attached to the rear port I felt a vacuum draw at the front port. Does this indicate a vacuum leak?
Sounds like vacuum canister has a ruptured diaphragm
Wes
Mine has about the same symptoms. After I do the vacuum hose test I may have to order an actuator. I bought mine with small actuator and the curved tube (I'll look again, but looks like a 72?). I'll just get the same thing since it's worked fine for like 32 years.
Originally Posted by SIXTYTWO
That's what I'm thinking too. Ordered one a few minutes ago.
Rich
Mine has about the same symptoms. After I do the vacuum hose test I may have to order an actuator. I bought mine with small actuator and the curved tube (I'll look again, but looks like a 72?). I'll just get the same thing since it's worked fine for like 32 years.
I bought mine from Ecklers . They're selling them on e bay, $118.00 and free shipping. I think I saw the other style too.
Just to finish the thread, I bought the new vacuum canister and finally got around to installing it today. It took about 6 minutes and now all is fine, wipers work great.
I'm thinking about having my original canister restored to keep the car as original as possible. I found an ad in the NCRS Driveline for a restoration service for the canister. I need to call and check the price.
I also pulled the radiator out to have it repaired so that ate up some time but it's back in now so we'll see what else needs attention after sitting for years.
Thanks to all who helped with the wiper door problem. Rich