Dash board display light not working properly

PIERRE.

MEMBER
2004 JEEP GRAND CHEROKEE
4.7L
V8
4WD
AUTOMATIC
150,000 MILES

Hi,

When I switch the headlight on ( only first position) the radio and dashboard display does not light. The sound of the radio work correctly. I will switch headlamp on second position every light (dashboard and radio) works correctly.

7 Replies

KEN L

MASTER CERTIFIED MECHANIC
48,505 POSTS

Hello,

It sounds like the headlight switch is out. To be sure here is a guide to check for power and the headlight wiring diagrams so you can see how it works and to see which wires to check for power:

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

Can you please shoot a quick video with your phone so we can see what's going on? that would be great. You can upload it here with your response. Check out the diagrams (below). Please let us know what you find.

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Saturday, July 27th, 2019 AT 12:56 PM

PIERRE.

MEMBER
4 POSTS

Hi,

As I switch headlamp on mileage display and radio display disappear, but radio continue to sound correctly.

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Sunday, July 28th, 2019 AT 9:44 AM

KEN L

MASTER CERTIFIED MECHANIC
48,505 POSTS

Thanks for the video. lets check fuse # 3 and 7 in the fuse panel under the hood. here is a guide to help test for power and the fuse locations as well:

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

Check out the diagrams (below). Please let us know what you find.

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Sunday, July 28th, 2019 AT 12:19 PM

PIERRE.

MEMBER
4 POSTS

Hi Ken and thank you for your answer.
I check both fuse as indicate, they are good and nothing change.
Note that radio and mileage display shuts off only when I switch on low beam.( First position) on high beam (second position) they light correctly.

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