Dad has informed me that the temp gauge on his 97 has quit working , it still blows warm air on a cold day , so it's heating up , just not showing on the gauge.

How do i trouble shoot it? where is the temp sensor? and how do i test it and the rest of the circuit?

 

Drivers side of the head......waaaaaayyyyyy in the back. It's a one wire connector.

 

 

That's where i was afraid it is , how do i test it?

I happen to have my fluke meter with me this weekend, so i want to get it all checked.

 

Ground the wire and see if the gauge goes up.

 

10-4 on that one partner.

I got to thinking right after i posted that , i can park my truck beside the old mans and start testing stuff, and find the difference.