wiper arm control valve function
Le Mans Master
Joined: Jul 2006
Posts: 8,117
Likes: 104
From: charlotte north carolina
the arm pushes the valve end down, and allows vacuum to pass thru to control relay. then the wiper door can close. remember that all these vacuum systems have a fault value of no vacuum on relay-open door.
jeff
jeff
Safety Car
Joined: Feb 2006
Posts: 3,557
Likes: 0
From: Ridgeway VA
Another way to say it is that it is the control relay for the wiper door - it tells the door that it is "safe" to close. If it doesn't close all the way first check the LH wiper to make sure it is not "holding up" the right hand wiper not allowing it to hit the valve top.
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
Not intending to complicate the discussion, but the valve under the right-side wiper is not really the controlling switch...it is a safety interlock switch for assuring that the wipers are down and seated before the wiper vacuum/solenoid switch [located on back of tach housing] will allow the door to close. {Just trying to help the poster understand how the system is set up.}
Safety Car
Joined: Feb 2006
Posts: 3,557
Likes: 0
From: Ridgeway VA
7T1vette - thanks for the further information. Very helpful. OF NOTE - I see in some catalogs you can now get that solenoid switch which until recently was very hard to find. Of course, you will be paying thru the nose.
Safety Car
Joined: Feb 2006
Posts: 3,557
Likes: 0
From: Ridgeway VA
Since we are on the subject - I understand the wiper door rear molding is made of stainless steel - on my '70 that molding is completely painted over but I remember someone on the forum that said the top of his was stainless -what/how should it be??? Tnx
Team Owner
Joined: Sep 2006
Posts: 31,272
Likes: 4,364
From: Westminster Maryland
Just the little bead near the windshield should show stainless. The rest of the trim piece is body color. The same goes for the 2 small pieces of trim at the rear of each fender near the windshield.
Regards,
Alan
Regards,
Alan
