Ice or water got in a connection some place I think? Fuses are good? Short or connection problem? What is best place to start trouble shooting?
Feb 28, 2019 at 3:08 PM
Taillights do not work when headlights are turned on
1999 TOYOTA TACOMA
SPARKY77
- MEMBER
- 1 POST
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STRAILER
- ✓ASE Certified Mechanic
- 54,837 POSTS
I would start with the tail light relay or combination switch. Here is a guide to help you get started with the tail light wiring diagrams so you can see how the system works:
https://www.2carpros.com/articles/how-to-check-wiring
and
https://www.2carpros.com/articles/no-tail-lights-exterior-running-lights-tail-lights-out
Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.
https://www.2carpros.com/articles/how-to-check-wiring
and
https://www.2carpros.com/articles/no-tail-lights-exterior-running-lights-tail-lights-out
Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.
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Professional Diagram for 2CarPros Members
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Click here to log in and view diagram.
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Click here to log in and view diagram.
Mar 2, 2019 at 12:19 PM
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.