Power Window Relay or Switches
Thread Starter
Melting Slicks
Joined: Jul 2009
Posts: 3,264
Likes: 3
From: Vero Beach FL
Power Window Relay or Switches
My car (1971) was in pieces when I got it two and half years ago with many parts missing. Well I have started assembling the power windows over the last weekend and with everything assembled they did not work. Tested the motors(wired direct) and both work. I have power from the 30amp fuse on the firewall and from the fuse panel. It appears to be either the switches or the relay. Would I be assuming correctly that to test the switches I need to just jump the connectors that pug into the switches? Is there a way to test the relay? Could I be missing something else?
Thanks, Scott
Thanks, Scott
Instructor
Joined: Sep 2008
Posts: 222
Likes: 0
From: penngrove ca
You can use a continuity meter to check the switches. I don't recall if the relay needs power to activate. I would use a 12v trouble light to make sure you are getting power to switches, relay & motor. If all this checks ok then it gets more involved with checking voltage drops to find the problem.
Thread Starter
Melting Slicks
Joined: Jul 2009
Posts: 3,264
Likes: 3
From: Vero Beach FL
Rip, It looks like it might be the relay there is no power getting to the switches from the it. I tested these circuits with a test light. The relay has three terminals tested as follows.
1) From the fuse panel to the relay the power is good.
2) From 30 amp fuse from the horn relay the power to the relay is good.
3) The Terminal at the relay to the switches has no power.
any thoughts?
1) From the fuse panel to the relay the power is good.
2) From 30 amp fuse from the horn relay the power to the relay is good.
3) The Terminal at the relay to the switches has no power.
any thoughts?
Safety Car
Joined: Oct 2007
Posts: 3,729
Likes: 267
From: Austin Texas
Corvette of the Year Winner 2017
2016 C3 of Year Finalist
follow the wires from known good power to known problem area.
you should be able to hear/feel the relay click or turn on, and be able to measure 12dc coming out of the relay. I believe when you turn the igintion key on.
(you did turn the key on right ? )
you should be able to hear/feel the relay click or turn on, and be able to measure 12dc coming out of the relay. I believe when you turn the igintion key on.
(you did turn the key on right ? )
Thread Starter
Melting Slicks
Joined: Jul 2009
Posts: 3,264
Likes: 3
From: Vero Beach FL
I wonder if I can open the relay and clean the contact points?
Thread Starter
Melting Slicks
Joined: Jul 2009
Posts: 3,264
Likes: 3
From: Vero Beach FL
Thread Starter
Melting Slicks
Joined: Jul 2009
Posts: 3,264
Likes: 3
From: Vero Beach FL
Mystery solved.... after looking closer at the relay I discovered that it is (was) the incorrect relay. Scary part is the connectors from the harness to the terminals hooked right up. I opened it up and the insides just crumbled. Ordering the correct relay. 
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