4WD light not working after TCA 19 actuator replacement?
JAMCAR
MEMBER
1988 GMC C1500
6 CYL
4WD
178,000 MILES
4WD light not working after TCA 19 actuator replacement. The vehicle listed above is a GMC K1500.
Wednesday, August 21st, 2024 AT 9:17 PM
1 Reply
KEN L
MASTER CERTIFIED MECHANIC
47,602 POSTS
I would check the fuses in the fuse panel under the dash, here is a guide to help check the fuse and if the fuse has power. Also here are the wiring diagrams for the system which is pretty straightforward so you can see how it works.