My water temp guage in my 94 blazer reads 100 at all times and never moves up so its definetly broken. Is there a way to fix this without buying a new guage?

 

It sounds like the gauge. Just in case test the sender. Unplug the sender and ground that 1 wire while the key is "on". It should peg the gauge out if the gauge works. If it doesn't move then your gauge is fubr'd, or a wire connecting it.

 

I have a 1993 Jimmy 4.3l that had the same issue. For me the fix was the Coolant Temperature Sending unit (about $15 and fifteen minutes). My Chilton's indicates that the sensor is on the right (passenger) side of the engine above the starter for both the 1993 and 1994 V6s. The four cylinder is located on the bottom right side of the thermostat housing.

My old unit was badly corroded. You can test the gauge by buying a new unit, connecting the wire to it and put it into a hot container of water to see if the gauge tracks the change in temp.

If it is bad and you want to change it you will need to:

• Work on the engine when cold
• Empty the cooling system below the sensor location
• Buy or borrow a deep socket for your ratchet
• Make sure the auto supply gives you the correct part - in addition to the Coolant Temperature Sender/Switch there is also a Coolant Temperature Sensor which is used to provide input to the computer. You want the former.
• Use Teflon tape on the sender threads to prevent leaks(Chilton).

Pretty easy fix even for an amateur like me. Hope this helps.

Licklog

 

thanks