How do I test my coolant temp sensor? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

TIMSPEED · 05-05-2003, 04:10 PM

I just replaced it like last year, and the guage isn't working again...how do I test it to see if it's the sensor or the wiring between the guage and sensor? It's the one in the drivers side head.

*rage'nrat638* · 05-05-2003, 08:00 PM

........a new one only cost about 5.00-10.00 dollars

**old Rusty C10** · 05-05-2003, 08:25 PM

remove the sensor from the motor and clean it well put it in an Oven stuffer roaster and place in the oven at 350 for two hours if it doesnt pop by then you know its shot

sorry had to say that LOL

**swervin ervin** · 05-05-2003, 08:39 PM

I don't think it has anything to do with 12 volts, as the sender doesn't use 12 volts to send a signal back to the gauge. I think you will need to check it with an ohmmeter, but I couldn't tell you what it should read if it's good.

You probably can hook the ohmmeter up to the sender when cold and take a reading. Then warm it up, either in the engine or a pan of water, and see if the reading changes. But if this is the correct way of checking it, I have no idea what the readings would be.

Just an uneducated guess.

05-05-2003, 04:10 PM	#1
TIMSPEED Join Date: Jan 2003 Location: Modesto, CA Posts: 1,321	How do I test my coolant temp sensor? I just replaced it like last year, and the guage isn't working again...how do I test it to see if it's the sensor or the wiring between the guage and sensor? It's the one in the drivers side head. __________________ I have a few cars... See Them Here

05-05-2003, 08:00 PM	#2
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	........a new one only cost about 5.00-10.00 dollars Last edited by rage'nrat638; 05-05-2003 at 09:53 PM.

05-05-2003, 08:25 PM	#3
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,297	remove the sensor from the motor and clean it well put it in an Oven stuffer roaster and place in the oven at 350 for two hours if it doesnt pop by then you know its shot sorry had to say that LOL __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

05-05-2003, 08:39 PM	#4
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	I don't think it has anything to do with 12 volts, as the sender doesn't use 12 volts to send a signal back to the gauge. I think you will need to check it with an ohmmeter, but I couldn't tell you what it should read if it's good. You probably can hook the ohmmeter up to the sender when cold and take a reading. Then warm it up, either in the engine or a pan of water, and see if the reading changes. But if this is the correct way of checking it, I have no idea what the readings would be. Just an uneducated guess. __________________ Mike 1985 Chevy C-10

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