Not sure if this is the right section, but it is headlight related. At the end of last year right before I put my car to bed, the headlight switch started hissing with the lights on or off.
So far all my troubleshooting with a hand vacuum pump has come up with no leaks except the switch. I've checked the motors separately, reservoir, and hoses using an ultrasonic leak detector.
I have new re-manufactured door motors (by West Coast Classic Cougars) installed maybe 2 years ago. I bought a NOS switch off of eBay and tried that, I also replaced the seals in my original switch. I also replaced the check valve between the headlight system and the climate control/ cruise control systems.
With both of these switches, I can pump them up to about 15in with my hand pump. They both will drop about 1 1/2in in 30 minutes and then will hold that for an hour.
I have taken both switches and plugged them into the vacuum system right at the check valve for the cruise control, trying to eliminate the junction block in the firewall. Made no difference, switch still hisses.
Am I still looking at a bad switch?
On a side note, about the same time my headlight switch started hissing, the cruise control stopped working. I'm sort of wondering if the two are related. The only place the connect is at the check valve. Climate control works like it's supposed to along with all the other vacuum operated accessories.
Thanks in advance for any help,
So far all my troubleshooting with a hand vacuum pump has come up with no leaks except the switch. I've checked the motors separately, reservoir, and hoses using an ultrasonic leak detector.
I have new re-manufactured door motors (by West Coast Classic Cougars) installed maybe 2 years ago. I bought a NOS switch off of eBay and tried that, I also replaced the seals in my original switch. I also replaced the check valve between the headlight system and the climate control/ cruise control systems.
With both of these switches, I can pump them up to about 15in with my hand pump. They both will drop about 1 1/2in in 30 minutes and then will hold that for an hour.
I have taken both switches and plugged them into the vacuum system right at the check valve for the cruise control, trying to eliminate the junction block in the firewall. Made no difference, switch still hisses.
Am I still looking at a bad switch?
On a side note, about the same time my headlight switch started hissing, the cruise control stopped working. I'm sort of wondering if the two are related. The only place the connect is at the check valve. Climate control works like it's supposed to along with all the other vacuum operated accessories.
Thanks in advance for any help,