Power Windows, Door Locks and A/C Do Not Work.

Tiny
DRODRIGUEZ
  • MEMBER
  • 1991 GMC SIERRA
  • 180,000 MILES
1 - The power windows do not work at all. There is no sound what-so-ever coming when I try to operate the windows and doors. I replaced all the fuses in the fuse box underneath the steering wheel.

2 - The A/C does not blow. There is a hissing like sound as well a 'click' when I turn the A/C on but no air comes out.

In addition the speedometer and odometer do not work. I think all these problems are related so I put them all in one message.


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Wednesday, May 29th, 2013 AT 7:50 PM

18 Replies

Tiny
SATURNTECH9
  • EXPERT
Do you have a multi meter to do some testing?We will start with trouble shooting the blower fan inop.
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Wednesday, May 29th, 2013 AT 7:56 PM
Tiny
DRODRIGUEZ
  • MEMBER
Unfortunately I don't I can buy one tomorrow and reply to you when I have it.
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Wednesday, May 29th, 2013 AT 8:18 PM
Tiny
SATURNTECH9
  • EXPERT
Sounds great let m know when you have it.
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Wednesday, May 29th, 2013 AT 8:36 PM
Tiny
DRODRIGUEZ
  • MEMBER
Ok.I have a multimeter
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Thursday, May 30th, 2013 AT 2:12 PM
Tiny
SATURNTECH9
  • EXPERT
I can't find a wire diagram for your blower motor let's start with the windows instead. Find the pwr -wdo circuit breaker and see if there is battery voltage on both sides of it with the key in the run position? Then with key in the run position see if the pink wire to the drivers power window switch has battery voltage?
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Thursday, May 30th, 2013 AT 6:07 PM
Tiny
DRODRIGUEZ
  • MEMBER
Alright, let me find out where the pw circuit breaker is first and I'll let you know when I'm getting ready to test it.
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Thursday, May 30th, 2013 AT 6:16 PM
Tiny
SATURNTECH9
  • EXPERT
Sounds good.
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Thursday, May 30th, 2013 AT 6:22 PM
Tiny
DRODRIGUEZ
  • MEMBER
K I think I found it, it's located in the fuse block slot #24. Let me go volt them out.
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Thursday, May 30th, 2013 AT 6:29 PM
Tiny
SATURNTECH9
  • EXPERT
Keep m posted.
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Thursday, May 30th, 2013 AT 6:35 PM
Tiny
DRODRIGUEZ
  • MEMBER
Ok unless I'm doing it wrong (touching the right prong with the red cable and left prong with black cable of the multimeter) I'm not getting any voltage from the cuircit breaker. I also touched the pink wire on the drivers side pw switch with the red side of the multimeter and nothing. Am I doing it wrong?
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Thursday, May 30th, 2013 AT 7:03 PM
Tiny
SATURNTECH9
  • EXPERT
You have to ground the black lead and use the red lead to test for power.
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Thursday, May 30th, 2013 AT 7:06 PM
Tiny
DRODRIGUEZ
  • MEMBER
Ok yeah. So I was doing it right. And the multimeter is set to 1.5V battery so I got nothing
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Thursday, May 30th, 2013 AT 7:14 PM
Tiny
SATURNTECH9
  • EXPERT
Did you try it in 12 or 20 volt DC setting?Do you have power to any of the fuses in the fuse box?
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Thursday, May 30th, 2013 AT 7:22 PM
Tiny
DRODRIGUEZ
  • MEMBER
I did now and still no life
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Thursday, May 30th, 2013 AT 7:32 PM
Tiny
SATURNTECH9
  • EXPERT
Now your going to have to do some digging as to why there is no power to the circuit breaker? Does any other fuse have no power?
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Thursday, May 30th, 2013 AT 7:39 PM
Tiny
DRODRIGUEZ
  • MEMBER
That's the strange thing.I tested fuses for parts that are operating like the wipers and I still didn't get a read
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Thursday, May 30th, 2013 AT 7:44 PM
Tiny
SATURNTECH9
  • EXPERT
Take a reading at the battery and see what you get?
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Thursday, May 30th, 2013 AT 7:48 PM
Tiny
DRODRIGUEZ
  • MEMBER
No read on the battery.. Discovered that the fuse in the MM was blown. Changed it got a good read. Changed the setting on the MM and blew the fuse in the MM again. So to be continued I don't have another fuse. When I get another fuse tomorrow I'm going to retest everything I tested before on the same setting I had the mm when I got the good read cuz I hav no idea how long ago the fuse blew. Onc I do that. Ill let you know what I find.
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Thursday, May 30th, 2013 AT 8:02 PM

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