Courtesy lights all on all the time.

1997 GMC YUKON
190,000 MILES • 5.7L • V8 • 4WD • AUTOMATIC
Avatar
442RON
  • MEMBER
  • 1 POST
I had to install a new alternator and now all of interior courtesy lights (dome and foot well) are on all the time. I have checked all door switches and they seem to be clear and working. I have set the dash controls for "off" all the time and operate with doors. Makes no difference. The dash controls are NOT set to keep the lights on. At this point the only way that I can see to turn the lights off is to remove all of the bulbs. I am currently keeping a trickle charger on the truck to keep the new battery from discharging
Dec 1, 2015 at 8:57 AM
Advertisement
Avatar
HMAC300
  • ✓ASE Certified Mechanic
  • 48,601 POSTS
  • ASE Certified Mechanic
you can pull fuse 3 inside truck to stop lights form working, but you will need to get it scanned for codes as it may be the interior lamp control module screwed up. auto parts cannot diagnosis this with their scanner. you might check the ground on lh side of dash to see if that is loose or corroded.
Dec 1, 2015 at 10:25 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.