temp gage help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**truckdude239** · 01-07-2009, 10:38 AM

okay my roommates dad has a 97 s-10 with 4.3 vortex. anyway his temp gage does not work hasn't worked in about a year problem started after ti blew the water pump gasket and over heated. we tried a new sending unit did not fix the problem. tested the gage by grounding the wire and it peged red hot doing this. emp gage just sits on cold any ideas where to look next?

BarryB · 01-07-2009, 02:56 PM

Are you sure you replaced the correct sending unit? Not saying I know for sure, but I have worked on several that had more than one temp sending unit.

**truckdude239** · 01-07-2009, 10:07 PM

replaced the one in the side of the driver side head. grounded the wire going to that unit and Gage pegged red hot

gchemist · 01-07-2009, 10:40 PM

96 and 97 engines have the sensor near the thermostat. 98 and new have it in head.
http://www.autozone.com/shopping/rep...00c152800bfd33

**truckdude239** · 01-08-2009, 08:07 AM

shop key says it is in the head and i dont see one around the t-stat

corn · 01-08-2009, 09:00 PM

Ive heard that there are two also. One for the gage & one for the computer. I have a 96 that took out the pump at one time & my gage reads cold all the time even after a different cluster.

BarryB · 01-08-2009, 10:04 PM

I did some work on a guage cluster yesterday. Fuel guage wasn't workng, after further investigation, I found it had a bad connection on the circuit board. Fixed that and it worked.

navybear70 · 01-17-2009, 10:27 PM

My temp gauge go's way up, but the truck doesn't seem to be running that hot.

Damien · 01-20-2009, 02:44 PM

Was thread tape used on the sender? If so, that could be causing the new sender not to have a path to ground.

redsean · 01-22-2009, 06:29 PM

I have a very simular prob. in my 93 (with 95 motor) my temp gauge stoped working i replaced the temp gauge by the tstat did not change. here is the stange part if i pulll the fuse the temp gauge works and all other gauges die.?????

sorry if i hijacked your thread...

Damien · 01-23-2009, 06:37 PM

Quote:

Originally Posted by redsean

I have a very simular prob. in my 93 (with 95 motor) my temp gauge stoped working i replaced the temp gauge by the tstat did not change. here is the stange part if i pulll the fuse the temp gauge works and all other gauges die.?????

sorry if i hijacked your thread...

The sender by the tstat is the coolant temp sender for the fuel injection. It has two wires going to it. The temp sender for the gauge is in the side of the head.
When you pull the fuse you are opening the circuit, and will have infinite resistance. The gauge should go to hot. I would check the wire on the driver side head to make sure it is connected and not broken. You could check resistance in your sender with a DVOM. The reading should not be infinite, maybe a couple hundred ohms?? Ground to base, red to terminal.

redsean · 01-24-2009, 01:51 PM

thanks man. much help

**truckdude239** · 01-31-2009, 08:04 AM

i sensor had tread sealant on it from when we bough t it

Damien · 02-02-2009, 12:44 PM

Quote:

Originally Posted by truckdude239

i sensor had tread sealant on it from when we bough t it

Thats OK. Sometimes people will tape the treads with too much tape and there won't be a good ground.

01-07-2009, 10:38 AM	#1
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,217	temp gage help okay my roommates dad has a 97 s-10 with 4.3 vortex. anyway his temp gage does not work hasn't worked in about a year problem started after ti blew the water pump gasket and over heated. we tried a new sending unit did not fix the problem. tested the gage by grounding the wire and it peged red hot doing this. emp gage just sits on cold any ideas where to look next? __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

01-07-2009, 02:56 PM	#2
BarryB Senior Member Join Date: Jul 2006 Location: Blountville, Tn. Posts: 3,904	Re: temp gage help Are you sure you replaced the correct sending unit? Not saying I know for sure, but I have worked on several that had more than one temp sending unit. __________________ We could learn a lot from crayons... Some are sharp; some are pretty;and some are dull. Some have weird names; and all are different colours;but they all have to live in the same box. You may be only one person in the world, But you may also be the world to one person. * Some mistakes are too much fun to only make once. Two rules in life. 1. Never sweat the small stuff! 2. Everything is small stuff!

01-07-2009, 10:07 PM	#3
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,217	Re: temp gage help replaced the one in the side of the driver side head. grounded the wire going to that unit and Gage pegged red hot __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

01-07-2009, 10:40 PM	#4
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Re: temp gage help 96 and 97 engines have the sensor near the thermostat. 98 and new have it in head. http://www.autozone.com/shopping/rep...00c152800bfd33 __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

01-08-2009, 08:07 AM	#5
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,217	Re: temp gage help shop key says it is in the head and i dont see one around the t-stat __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

01-08-2009, 09:00 PM	#6
corn Registered User Join Date: Dec 2003 Location: here Posts: 5,789	Re: temp gage help Ive heard that there are two also. One for the gage & one for the computer. I have a 96 that took out the pump at one time & my gage reads cold all the time even after a different cluster.

01-08-2009, 10:04 PM	#7
BarryB Senior Member Join Date: Jul 2006 Location: Blountville, Tn. Posts: 3,904	Re: temp gage help I did some work on a guage cluster yesterday. Fuel guage wasn't workng, after further investigation, I found it had a bad connection on the circuit board. Fixed that and it worked. __________________ We could learn a lot from crayons... Some are sharp; some are pretty;and some are dull. Some have weird names; and all are different colours;but they all have to live in the same box. You may be only one person in the world, But you may also be the world to one person. * Some mistakes are too much fun to only make once. Two rules in life. 1. Never sweat the small stuff! 2. Everything is small stuff!

01-17-2009, 10:27 PM	#8
navybear70 hometown heroes! Join Date: Jan 2003 Location: Ewa Beach, HI Posts: 487	Re: temp gage help My temp gauge go's way up, but the truck doesn't seem to be running that hot. __________________ 2009 Silverado 2wd, 121k as of 04APR13. I love my truck 29 days out of the month. The payment is due on the 30th... Do your duty in all things. You cannot do more, you should never wish to do less. -Robert E. Lee "Never give up ground you've already taken." -Unknown

01-20-2009, 02:44 PM	#9
Damien Registered User Join Date: Mar 2007 Location: Farmington, MN Posts: 928	Re: temp gage help Was thread tape used on the sender? If so, that could be causing the new sender not to have a path to ground. __________________ I can still count my vehicles on two... wait three hands. Last edited by Damien; 01-20-2009 at 02:45 PM. Reason: spelling

01-22-2009, 06:29 PM	#10
redsean Registered User Join Date: Nov 2008 Location: florence ky Posts: 51	Re: temp gage help I have a very simular prob. in my 93 (with 95 motor) my temp gauge stoped working i replaced the temp gauge by the tstat did not change. here is the stange part if i pulll the fuse the temp gauge works and all other gauges die.????? sorry if i hijacked your thread... Last edited by redsean; 01-22-2009 at 06:30 PM.

01-24-2009, 01:51 PM	#12
redsean Registered User Join Date: Nov 2008 Location: florence ky Posts: 51	Re: temp gage help thanks man. much help

01-31-2009, 08:04 AM	#13
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,217	Re: temp gage help i sensor had tread sealant on it from when we bough t it __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube



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