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Climate control my blinkers my brake lights all went out at the same time

Tiny
JAMORCO
  • MEMBER
  • 1991 CADILLAC BROUGHAM
  • 5.7L
  • 5 CYL
  • 2WD
  • 75,000 MILES
It is a headache. Any idea on what might cause this issue? I’ve checked the fuse box and the blinker fuse was the only fuse blown. I am stumped!
Monday, November 18th, 2019 AT 8:17 PM

11 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,381 POSTS
Hello,

Can you see if you have power at the stop-hazzard fuse? here is a guide to help please test with the key one:

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

Here is the fuse location ins the diagrams below. Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.
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Wednesday, November 20th, 2019 AT 11:21 AM
Tiny
JAMORCO
  • MEMBER
  • 6 POSTS
Yes sir it’s has power I tested it and it lit up green, so next I replaced the fuse and still nothing.
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Thursday, November 21st, 2019 AT 3:18 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,381 POSTS
Okay, it sounds like you lost the ground somewhere. here is a guide and the wiring diagrams for the climate control and blinker and brake light systems:

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

Check out the diagrams (below). Please let us know what happens.
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Friday, November 22nd, 2019 AT 9:41 AM
Tiny
JAMORCO
  • MEMBER
  • 6 POSTS
I take that back I miss understood the light tester, so it’s lighting up green meaning it’s grounded and it’s not getting power any solution for this?
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Friday, November 29th, 2019 AT 9:27 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,381 POSTS
Where are you not getting power?
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Sunday, December 1st, 2019 AT 1:28 PM
Tiny
JAMORCO
  • MEMBER
  • 6 POSTS
The stop hazard fuse.
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Sunday, December 1st, 2019 AT 2:28 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,381 POSTS
Okay that is powered by fusible links down at the starter. Can you inspect the links by pulling on them to see if there are still connected please? Let us know.
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Monday, December 2nd, 2019 AT 10:17 AM
Tiny
JAMORCO
  • MEMBER
  • 6 POSTS
So I figured it out it! The guys who installed my motor ran a wire from my alternator to my fuse box, but now it runs like a champ.
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Sunday, January 12th, 2020 AT 1:12 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,381 POSTS
Glad you could get it fixed, that kind of problem can be tough. Please use 2CarPros anytime we are here to help.
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Monday, January 13th, 2020 AT 11:44 AM
Tiny
JAMORCO
  • MEMBER
  • 6 POSTS
My dash is lighting up but no numbers are showing and my temperature control isn’t getting any power so I can’t turn my A/C or heat on! What do you thinks the cause?
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Monday, January 13th, 2020 AT 11:50 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,381 POSTS
Use the wiring diagrams form above to check for power and ground if okay replace the HVAC controller.
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Wednesday, January 15th, 2020 AT 11:01 AM

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