Is hot lamp suppose to light when key on?
Bulb is good.

 

As far as I know, all the warning lights are supposed to come on for a second or two to show you the bulb is working. If the light doesn't go out after a couple seconds, then I'd be worried.

 

That's what we were fixing. Had to replace the seat belt bulb, turn the SES bulb to make contact, but the temp bulb does not illuminate. The bulb is good. The temp gauge works too.

 

All this to track down why one little bulb won't illuminate...[/align][/align]But I like all my gauges and system information to work [/align][/align]The bulb is suppose to illuminate at bulb test. The trouble shooting doesn't give many options.[/align]1. check bulb and connection[/align]2. replace instrument cluster. [/align][/align]http://i80.photobucket.com/albums/j1...eschematic.gif[/align][/align]This from GMP/98-WC-1[/align]

 

I performed the test for the gauge:
Only I used a 47ohm resistor to connect terminal C to ground and it Passed.
The gauge rose to HOT and the light lit.
Don't know why it doesn't come on at bulb test but it dose function properly.