windshield wiper lid?
Thread Starter
Burning Brakes
Joined: May 2006
Posts: 857
Likes: 1
From: Morrisonville Illinios
windshield wiper lid?
OK gang we have a 71' that have replaced all the hoses and acturators to the wiper door assembly now all of a suddened the damn wiper door will open once it is started and will not go back down until you turn it off and push it close. I have attempeted to adjust the litlle vacuum swith under the door but doesn't make a difference, do you thing that one of the acturators could have gone bad?
Thanks wro87
Thanks wro87
Melting Slicks
Joined: Apr 2007
Posts: 3,189
Likes: 111
From: Tolland CT
I doubt an actuator has gone bad.
The items I would check are hoses, could one have fallen off?
Override valve under the steering column.
Control unit, either on the firewall near the master cylinder or wheel well?
It's on the firewall on the 70.
The plunger control which the wiper arm presses on when parked, in the wiper tub.
Maybe the solenoid mounted to the back of the tach.
Are you sure a hose didn't get knocked off behind the dash?
The items I would check are hoses, could one have fallen off?
Override valve under the steering column.
Control unit, either on the firewall near the master cylinder or wheel well?
It's on the firewall on the 70.
The plunger control which the wiper arm presses on when parked, in the wiper tub.
Maybe the solenoid mounted to the back of the tach.
Are you sure a hose didn't get knocked off behind the dash?
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,853
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
OK gang we have a 71' that have replaced all the hoses and acturators to the wiper door assembly now all of a suddened the damn wiper door will open once it is started and will not go back down until you turn it off and push it close. I have attempeted to adjust the litlle vacuum swith under the door but doesn't make a difference, do you thing that one of the acturators could have gone bad?
Thanks wro87
Thanks wro87
The solenoid blocks the vacuum on hose B and when this happens the vacuum is lost all the way to the relay H which opens the wiper door from lack of vacuum on hose K.
So what would I check... I think the first thing I would check is to make sure the hoses are on the relay H in the correct position. If these hoses are reversed, the system works backwards.
If not.. then look at this schematic.. and back track.. looking for where the vacuum is being blocked at. Just remember, for the door to close there must be vacuum on hoses K D and B. All items such as the solenoid, the over-ride, and the wiper arm valve will pass vacuum when the system is off.
So.. Check hoses G and F and make sure they are on the relay correctly.
For the door to be opening.. something is blocking vacuum or the hoses are on the relay H wrong.
Last edited by Willcox Corvette; Jun 21, 2011 at 02:11 PM.
