Overdrive off light

2003 TOYOTA TUNDRA
206,000 MILES • 4.7L • V8 • 4WD • AUTOMATIC
Avatar
2003_ARDNUT
  • MEMBER
  • 2 POSTS
When putting my truck in reverse the OD off light comes on. I’ve ensured I am not pressing the button as I shift. I put it in drive a press the button and all is fine. The button works as it should otherwise.
Feb 18, 2020 at 11:51 AM
Advertisement
Avatar
JACOBANDNICKOLAS
  • CAR REPAIR CONTRIBUTOR
  • 110,193 POSTS
Hi,

It sounds like an issue in the switch wiring. I have a diagnostic chart. It is somewhat involved for testing specific leads. However, I have a feeling it is related to the wiring. Something must be shorting to power when the switch is in the reverse position.

If you look at the attached pics, it shows the schematic and the procedure. Again, it's a little involved. However, here are a few links you may find helpful:


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

https://www.2carpros.com/articles/how-to-use-a-voltmeter

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

_____________________

Let me know if this helps.

Take care,
Joe
Images (Click to enlarge)
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Professional Diagram for 2CarPros Members
Click here to log in and view diagram.
Feb 18, 2020 at 5:18 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
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.