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Wipers, blower motor, temperature gauge not working

Tiny
PATRICK CASE
  • MEMBER
  • 1999 GMC SONOMA
  • 2.2L
  • 4 CYL
  • 2WD
  • MANUAL
  • 200,000 MILES
I am having electrical problems in my research I found out that the wipers, temperature gauge, and blower motor for the heater take power from the ignition switch. So I pulled the switch out and I jumped power between the switch and the blower motor, temperature gauge, an wipers all started to work. So I figured I had a bad ignition switch so I replaced the ignition switch and I am still not getting power to these things. The truck will turn over and start just fine but it seems like I am not getting power through the switch in run. Any help would be appreciated. Thanks
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Wednesday, November 7th, 2018 AT 7:23 AM

8 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
It sounds like you have an IGN B or IGN C fuse that is blow under the hood. Here is the ignition switch wiring diagrams (below) and a guided to help you run a test for power:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Check out the diagrams (below). Check for power at the red and red/white wires at the switch. Please let us know what happens.

Cheers, Ken
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Thursday, November 8th, 2018 AT 1:02 PM
Tiny
PATRICK CASE
  • MEMBER
  • 6 POSTS
I have checked for power at those to wires yesterday and there is power there.
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Thursday, November 8th, 2018 AT 1:23 PM
Tiny
PATRICK CASE
  • MEMBER
  • 6 POSTS
And I have checked all fuses under the hood they are all good.
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Thursday, November 8th, 2018 AT 1:30 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
With the key on do you have power at the white, brown and orange wires? (At the switch)
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Friday, November 9th, 2018 AT 11:09 AM
Tiny
PATRICK CASE
  • MEMBER
  • 6 POSTS
With the key on there is no power to the white brown or orange wires.
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Saturday, November 10th, 2018 AT 3:18 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
With the key off do you have power at the orange and red wires? If so the switch is bad and needs to be replaced. If not then check for power at fuses IGN C and IGN B.

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Please let us know what you find.
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Monday, November 12th, 2018 AT 9:42 AM
Tiny
PATRICK CASE
  • MEMBER
  • 6 POSTS
I just replaced the switch. And I am still having the same issues. I put a toggle switch in and bypassed power through the switch and everything is working.
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Monday, November 12th, 2018 AT 10:35 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
Do you have power at fuses IGN C and IGN B? Here is the locations.
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Tuesday, November 13th, 2018 AT 10:25 AM

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