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Chris, Shop Foreman
Category: Jeep
Satisfied Customers: 3137
Experience:  Jeep Certified Master Tech
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None of the 3 brake lights are working. Tail lights, turn

Customer Question

None of the 3 brake lights are working. Tail lights, turn signals, and backup lights are fine. Just no brake lights. All bulbs are ok, fuse #23 is ok, and i replaced the brakelight switch.
JA: Have you checked the bulbs? Have you checked the connection?
Customer: Yes I have checked the bulbs, and yes i have checked the connection.
JA: What is the model/year of your Jeep?
Customer: 1999 Grand Cherokee Laredo
JA: Are you fixing your Grand Cherokee yourself? What have you tried so far?
Customer: Yes I am trying to fix it myself. I have replaced the brake switch, checked the fuse, and checked all bulbs.
JA: Anything else you want the mechanic to know before I connect you?
Customer: No
Submitted: 2 months ago.
Category: Jeep
Expert:  Jerry replied 2 months ago.

Hello and welcome. My name is ***** ***** you for visiting the site, I am reviewing your question and will reply shortly, thanks.

Expert:  Jerry replied 2 months ago.

Do you have voltage at terminal #6 at the brake light switch?

Also at terminal #5 when the pedal is pressed?

Customer: replied 2 months ago.
Unfortunately I am at work and cannot check it right now. Will i be able to re-open this conversation with you after i can check it?
Expert:  Jerry replied 2 months ago.

I almost forgot to post the diagram of the connector.

Customer: replied 2 months ago.
Can I re-open this conversation tonight after I can check it?
Expert:  Jerry replied 2 months ago.

Yes, you can always log back on and continue whenever you like, thanks. I should be on into the night, God willling.

Customer: replied 2 months ago.
I have 12.39 at terminal 6 and also at terminal 5 but only when pedal is pressed.
Expert:  Jerry replied 2 months ago.

Good job. If you can have someone step on the brake and see if there is voltage at the rear light module(s) white/tan wire(s) when the brake is on, thanks.

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