tai lights aren't working

1999 CADILLAC ESCALADE

LARNEYBUSH

MEMBER
1 POST

My tail lights will not come on when all the lights are on. The brake and the hazzard lights both work, but the rear park light will not come on. Checked all fuses and the are all good. What can be the problem then the fix?

Sep 22, 2011 at 3:41 AM

JACOBANDNICKOLAS

✓ASE Certified Mechanic
110,194 POSTS

Make sure the bulbs are good. They are a duel element bulb. One could work and the other be bad. After that, you need to check for power to the socket. If there is no power, you need to check wiring. Remember, the power to the lights goes through the headlight switch. It could be bad.

Read the guide below on how to use a test light, it will help

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

Attached below are the wiring diagrams for you rear lights

Images (Click to enlarge)

Professional Diagram for 2CarPros Members
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Sep 22, 2011 at 3:50 AM

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.