Four wheel drive

2004 CHEVROLET TAHOE
228,000 MILES • V8 • 4WD • AUTOMATIC
Avatar
TARYNPARKS
  • MEMBER
  • 2 POSTS
My I have replaced the four wheel drive switch interrupter on the dash. I have check the two fuses and still no lights on my four wheel drive switch and it does not work. Could this mean that I need to replace the transfer case?
Nov 19, 2018 at 10:20 PM
Advertisement
Avatar
STEVE W.
  • ✓Experienced Mechanic
  • 15,239 POSTS
No, the case itself does not control the lights, they are controlled by the encoder motor on the case as well as the transfer case control module. Both are common failure items. The fastest way to determine which is the problem is actually to use a good scan tool to see what the various parts are doing as you move the selector switch. It will show you which mode the case it is in as you move the switch, or show you that is is not switching as you move the switch. As those parts can be very expensive and need to be programmed to work, you do not want to just guess and replace them hoping you find the correct one the first time.
Nov 20, 2018 at 1:28 AM
Avatar
TARYNPARKS
  • MEMBER
  • 2 POSTS
Thank you.
Nov 20, 2018 at 2:03 AM
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.