That is a good way to check it assuming the circuit is in tact. On my truck where I do not have the 4wd indicator harness plugged into the CAD anymore (and the light worked before I unplugged it), the procedure above does not light the 4wd dash light. So I am only guessing that for his malfunctioning light, it will fail to display as well as the circuit gets it's ground from the CAD connection when engaged.

Try it, but if it fails to light using the check cluster method above, you may still have to check the light and harness wires individually.

Regarless,I doubt seriously it is the bulb/led, and am suspecting a bad contact on the CAD or wiring harness.

 

Ok thanx guys ill try somethin to see if i can get it back on. but what threw out that my thought on the bulb was as far as i have seen i dont have any other dash lights out(like gas light, check engine, low fuel or any of those) its really weird. Nhlbill if u want u can send that to me if u think that will help?

 

Yep dhvaughan it lights them all up but not the 4wd indicator light and swept all the gauges. I will check if its a fuse tomorrow but other than that im not sure what it could be and does anyone have any idea what could have caused it to go out like this?

 

ramman - bill's post about it not working if unplugged at cad seems on target. i didn't know that.
i still doubt that the bulb is blown.
i'd inspect/remove/clean the elec connector from the cad. (see first post above from ramman)
if that doesn't fix it, i'd remove the switch and troubleshoot it.

bavarskas - could your switch be shorted out to ground ? since it doesn't work when installed.