70 Power window Problem
Thread Starter
Racer
Joined: Dec 2006
Posts: 416
Likes: 40
From: Swansea IL
70 Power window Problem
My driver's side window will raise but not lower. It would lower intermittently but has now quite that all together.
I figure that it is either the switch, wiring, or a relay?
The service manual doesn't show a schematic for this circuit. In the door section is does have an illustration for what looks like the wiring harness, switch, and some sort of wiring connection at the front of the console.
The switch will be easy enough to check out. How about the relay? Also, is the switch and/or relay still availalble? Anybody know which manual the schematic is actually in?
Thanks for the help
Bob
I figure that it is either the switch, wiring, or a relay?
The service manual doesn't show a schematic for this circuit. In the door section is does have an illustration for what looks like the wiring harness, switch, and some sort of wiring connection at the front of the console.
The switch will be easy enough to check out. How about the relay? Also, is the switch and/or relay still availalble? Anybody know which manual the schematic is actually in?
Thanks for the help
Bob
Le Mans Master
Joined: Aug 2006
Posts: 7,417
Likes: 1,554
From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Hi Bob3700, in Haynes on page 12-32 theres a " Typical " power window schenatic. They call the relay a circuit breaker, in my 74 it was under the console.
My problem turned out to be a broken wire where the door opens.
Hope this helps, Pete.
My problem turned out to be a broken wire where the door opens.
Hope this helps, Pete.
TheCorvetteBen
Joined: Feb 2007
Posts: 4,987
Likes: 144
From: Van Alstyne, TX
[QUOTE=petes74ttop;1562416787]
My problem turned out to be a broken wire where the door opens.
QUOTE]
Same with mine. window went up and then wouldnt move down. actually wasnt that bad of a job to fix
My problem turned out to be a broken wire where the door opens.
QUOTE]
Same with mine. window went up and then wouldnt move down. actually wasnt that bad of a job to fix
Racer
Joined: Jan 2007
Posts: 385
Likes: 3
From: RTP NC
My driver's side window will raise but not lower. It would lower intermittently but has now quite that all together.
I figure that it is either the switch, wiring, or a relay?
The service manual doesn't show a schematic for this circuit. In the door section is does have an illustration for what looks like the wiring harness, switch, and some sort of wiring connection at the front of the console.
The switch will be easy enough to check out. How about the relay? Also, is the switch and/or relay still availalble? Anybody know which manual the schematic is actually in?
Thanks for the help
Bob
I figure that it is either the switch, wiring, or a relay?
The service manual doesn't show a schematic for this circuit. In the door section is does have an illustration for what looks like the wiring harness, switch, and some sort of wiring connection at the front of the console.
The switch will be easy enough to check out. How about the relay? Also, is the switch and/or relay still availalble? Anybody know which manual the schematic is actually in?
Thanks for the help
Bob
Bob,
I just had the exact same problem that you describe. Mine turned out to be the wiring as well. It is 14ga wire from the switches to the window motor. It is fairly easy to fix but, of course, you have to have the door panel off as well as the inside kick panels to get to the wiring that goes through the door conduit. I went to Home Depot and bought 3 ft of each color wire (I went ahead and did both doors). I made the splices in 2 places, one inside the car where it goes through the conduit and the other closer to the window motor. This allowed me to take out most of the older wire and especially the wire that was inside the conduit. For the splices, I bought the butt connectors (i think that is what they are called) and stripped both ends of the wire, placed it in the connector and crimped them with a crimping tool. I used some solder and covered that with heat shrink.... Hope this helps.
Thread Starter
Racer
Joined: Dec 2006
Posts: 416
Likes: 40
From: Swansea IL
Thanks for the help.
If it is 14 ga wire, they probably they don't use a relay as that is pretty hefty size wire and will carry the current for the motor.
I'll check the switch but will go after the wire.
Bob
If it is 14 ga wire, they probably they don't use a relay as that is pretty hefty size wire and will carry the current for the motor.
I'll check the switch but will go after the wire.
Bob
Racer
Joined: Jan 2007
Posts: 385
Likes: 3
From: RTP NC
My '76 has a Relay. It is under the shifter console, in front of the shifter, sorta under the radio. From what everybody here was telling me in the past, it probably would not be the Relay. I changed that since I had the inside of the car removed anyway but it didn't fix the problem. Seems like it was about $25 from Zip. My guess would be the wiring....
