wiper arm question?
Working my 72 wiper system to where it works. I have been on youtube to check the wiper arm vacuum control valve. One shows check the red port which does not work and another states check the white port which is does. What is the correct test for this...Thankyou
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Re: wiper arm question?
If your checking the wiper control relay on the RH inner fender, in it's relaxed state, plug the center yellow port and pull vacuum on the lower green port. It should hold vacuum.
If you apply vacuum to the very top metal port, then leave the center port capped, and pull vacuum on the top (red) port. It should hold vacuum.
Gary B
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