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AC/Heater digital display black

Tiny
J.STE
  • MEMBER
  • 1991 CHEVROLET CHEYENNE
  • 4.3L
  • V6
  • 2WD
  • AUTOMATIC
  • 12,000 MILES
Started the car for the summer, battery was dead so I had to jump start the car.
Car starts, all electronics work exept for the display for AC/Heater. The fan will not start.
Checked fuses in the fuse box, they are all good.
I read something about the fusible links under the hood, does anyone have pictures on these cables?
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Saturday, April 11th, 2020 AT 3:41 AM

7 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

I attached diagrams of the connector for the control. You need to verify power to the connector in the terminal marked battery power.

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

If you have power, the control head is bad. If you do not, then it is either wiring or a link.

https://www.2carpros.com/articles/how-to-check-wiring

I attached the locations of the fusible links.

Roy
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Saturday, April 11th, 2020 AT 4:51 AM
Tiny
J.STE
  • MEMBER
  • 4 POSTS
Okay, so where is the control located? Is that the display, so I remove the dash and check the back of the display?
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Saturday, April 11th, 2020 AT 8:05 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Correct. Remove the bezel around the control head and then there should be a couple of screws to remove.

Roy
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Saturday, April 11th, 2020 AT 8:08 AM
Tiny
J.STE
  • MEMBER
  • 4 POSTS
Okay, thanks!
Is there a good tool to check if I have power?
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Saturday, April 11th, 2020 AT 9:01 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
A test light is good to use. You can get it at any parts store.

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

Roy
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Saturday, April 11th, 2020 AT 9:33 AM
Tiny
J.STE
  • MEMBER
  • 4 POSTS
Can I check the fusible links with the light pen? If so, how?
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Saturday, April 11th, 2020 AT 11:48 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You test for power on either side. The stud should show power and the wire at the end of the fuse wire should have power as well.

Roy
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Saturday, April 11th, 2020 AT 11:51 AM

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