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73-87chevytrucks.com
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73-87 Chevy _ GMC Trucks
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1985 GMC Sierra Classic and both power windows don't work!
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Topic: 1985 GMC Sierra Classic and both power windows don't work! (Read 15204 times)
cbwallace30
Newbie
Posts: 6
Newbie
1985 GMC Sierra Classic and both power windows don't work!
«
on:
June 24, 2013, 12:33:30 PM »
Hi,
I bought my 1985 GMC Sierra Classic used. Both power windows do not work. When I press the switch on the driver's door I don't hear anything like a motor, engage. I have already replaced the switch and checked my fuses. The guy that I bought it from told me there is "module" further down in the door that needs to be replaced. I am newbie and I thought the module he was referring to WAS the switch. Since both power windows don't work, I'm thinking that this is an electrical problem that's prohibiting electrical current getting to the appropriate device.
Do I need to take the door off? What do I need to look for? My power locks work fine. Please be as detailed as possible because I'm a newbie when it comes to things like this.
Thanks, Craig
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cbwallace30
Newbie
Posts: 6
Newbie
Re: 1985 GMC Sierra Classic and both power windows don't work!
«
Reply #1 on:
June 25, 2013, 11:56:28 AM »
This thread has been viewed 17 times. Anybody?
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rich weyand
Senior Member
Posts: 1391
Re: 1985 GMC Sierra Classic and both power windows don't work!
«
Reply #2 on:
June 25, 2013, 12:16:10 PM »
Electrical problems are almost always connectors or grounds. Here's the diagram:
http://www.73-87chevytrucks.com/techinfo/wiring_diagrams/powerwindows.gif
Pull the drivers door panel. Check for power (with a voltmeter on "volts dc" to ground) on the PINK wire at the window switch; you should get battery voltage, 13.2 volts). Then check for ground (with a voltmeter on "ohms" to ground) on the BLK wire at the window switch; you should get low ohms (0-5). That's first thing.
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Rich
"Working Girl": 1978 K-10 RCSB 350/TH350/NP203 +2/+3 Tuff Country lift
ehjorten
Senior Member
Posts: 1203
Re: 1985 GMC Sierra Classic and both power windows don't work!
«
Reply #3 on:
June 25, 2013, 01:48:31 PM »
There is a relay under the dash for the power windows. You might want to investigate that.
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-Erik-
1991 V3500 - Gen V TBI 454, 4L80E, NP205, 14 bolt FF, D60, 8" Lift on 35s
1977 K20 Silverado - 350, THM350, NP203, 14 bolt FF, D44, Stock Lift on 31s
1969 Chevelle Malibu Sport Coupe - EFI350, THM350
1968 Chevrolet Step-side Pickup - 300HP L6
cbwallace30
Newbie
Posts: 6
Newbie
Re: 1985 GMC Sierra Classic and both power windows don't work!
«
Reply #4 on:
June 25, 2013, 05:33:53 PM »
I saw the power window fuse and I replaced it. Is a relay something else? Can you tell me what it looks like?
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rich weyand
Senior Member
Posts: 1391
Re: 1985 GMC Sierra Classic and both power windows don't work!
«
Reply #5 on:
June 25, 2013, 05:53:28 PM »
Google this, lots of good stuff: 1985 chevy truck power window relay
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Rich
"Working Girl": 1978 K-10 RCSB 350/TH350/NP203 +2/+3 Tuff Country lift
cbwallace30
Newbie
Posts: 6
Newbie
Re: 1985 GMC Sierra Classic and both power windows don't work!
«
Reply #6 on:
June 25, 2013, 09:26:11 PM »
Okay. Thank you
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Irish_Alley
Tim
Global Moderator
Senior Member
Posts: 13319
Family is not an important thing. It's everything.
Re: 1985 GMC Sierra Classic and both power windows don't work!
«
Reply #7 on:
June 25, 2013, 11:02:49 PM »
are you getting power to the switch?
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If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley
When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes
cbwallace30
Newbie
Posts: 6
Newbie
Re: 1985 GMC Sierra Classic and both power windows don't work!
«
Reply #8 on:
June 25, 2013, 11:57:40 PM »
No. No power to the switch. The passenger side won't roll down either. I don't even here the motor kicking in.
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Irish_Alley
Tim
Global Moderator
Senior Member
Posts: 13319
Family is not an important thing. It's everything.
Re: 1985 GMC Sierra Classic and both power windows don't work!
«
Reply #9 on:
June 26, 2013, 12:38:13 AM »
not sure but i dont think there is a relay for the window just for the locks. and the diagram posted above doesnt show one for the windows so that kind of backs this up. so check your wires follow them from the switch to the dash make sure you have power at the dash also. check for broken wires. was your window fuses blown?
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If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley
When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes
Irish_Alley
Tim
Global Moderator
Senior Member
Posts: 13319
Family is not an important thing. It's everything.
Re: 1985 GMC Sierra Classic and both power windows don't work!
«
Reply #10 on:
June 26, 2013, 12:42:58 AM »
http://forum.73-87chevytrucks.com/smforum/index.php?topic=20550.0
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If you can’t tell yourself the truth, who can you tell it to?~Irish_Alley
When you have eliminated the impossible, whatever remains, however improbable, must be the truth ~Sherlock Holmes
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1985 GMC Sierra Classic and both power windows don't work!