2001 S10 ClubCab Is there a Relay or Fuse that supplies Instrument lighting when the lights are on you have found no blown fuse for illumination and you tested wiring by jumper and panel did light?

Answer 1

The Hard WayI guess I'll have to do it the hard way and carefully remove the outer wrapping of the wire harness and physically trace the wiring to all points to look for a disconnected wire or a bad component.

I know the fuse is good and the wiring from the fuse to the dash is good because it all lit up when I jumpered from constant 12V to the Cluster side of the fuse socket.

I will try simply putting a jumper in place of the fuse and see if the cluster lights when the headlights are turned on. If that doesn't work, then I'll have to trace the actual wiring by hand.

There might be the possibility that wuith a good fuse, the socket for the fuse may be too loose to make a good connection. Or there is an unknown relay or module that needs to be replaced that I haven't figured out what or where those would be.

Another thing you can try is check your light switch and make sure you get current flow though it when you turn on the lights.