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09-14-2006, 10:12 PM | #1 |
Junior Member
Join Date: Nov 2005
Location: Saint Francisville, Louisiana
Posts: 157
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Temperature gauge shows hot, truck not
I was ride around yesterday evening and looked down at the temperature gauge and it was pegged out as far as it could go to the hot side. Truck was running fine and showed no signs of overheating. I got home and shut the truck off and it stayed all the way over pass hot. I killed all the electrical current (main battery switch) and it never moved. Still that way this evening when I checked it and truck hadn't been run. All other gauges are working fine. Does anyone know what might have cause this and the fix? Thanks Randy
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1972 GMC K2500, stepside, stock 350, 4 speed. Former F/D truck with 32,000 miles, no rust. 1973 Jeep CJ 5, 304, 33's with side pipes 2008 GMC 2500HD, CC, SWB, D/A, SLT |
09-14-2006, 10:17 PM | #2 |
Gone Fishing
Join Date: Aug 2005
Location: Fort Worth, Texas 76135
Posts: 12,361
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Re: Temperature gauge shows hot, truck not
Check the wire going to your temp sender. It has probably feel against the exhaust or something
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68 Chevy Short Fleetside LSX Swap Under Way 3.73 posi 2.5/4 drop Frame of resto has been started 2022 Hyundai Tucson Limited 2019 Chevy Traverse Redline Edition Wifes Ride Build Thread http://67-72chevytrucks.com/vboard/s...=1#post3483616 |
09-14-2006, 10:38 PM | #3 |
Senior Member
Join Date: Jan 2005
Location: Loveland Co.
Posts: 3,098
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Re: Temperature gauge shows hot, truck not
If it's all the way pegged hot that means it's grounded out, follow the wire, you'll probably find the problem fairly easily.
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Chris 74 Custom Deluxe SWB 350/350/3.73’s 99 2wd Silverado RCSB 5.3/4L60/3.90’s http://www.classictrucks.com/feature...short_bed.html |
09-14-2006, 10:51 PM | #4 |
Junior Member
Join Date: Nov 2005
Location: Saint Francisville, Louisiana
Posts: 157
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Re: Temperature gauge shows hot, truck not
Thanks guys. I will check it out tomorrow. It had me worried that the gauge might be messing up but now it sounds like a possible easy fix.
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1972 GMC K2500, stepside, stock 350, 4 speed. Former F/D truck with 32,000 miles, no rust. 1973 Jeep CJ 5, 304, 33's with side pipes 2008 GMC 2500HD, CC, SWB, D/A, SLT |
09-15-2006, 02:22 AM | #5 | ||
Registered User
Join Date: Sep 2003
Location: Oroville, CA ( northern California)
Posts: 466
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Re: Temperature gauge shows hot, truck not
mine did that. wire had fused to manifold. rewired and never happened again.
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09-15-2006, 09:51 AM | #6 | |||
Union Electrician
Join Date: Feb 2005
Location: Louisville, Ky.
Posts: 3,354
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Re: Temperature gauge shows hot, truck not
Every now and then the resistor on the gauge goes bad and produces the same outcome.If the sending unit wire is not shorted out anywhere, the you should look at replacing the resistor.
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69 Custom-10 SWB FLEETSIDE 350/350 TH Dropped 3.5/5.5" Help support the board->HERE Board vendors -> Vendors list Zip:40272 Big Sandy Survivor... Quote:
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11-07-2006, 06:10 PM | #7 |
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Join Date: Apr 2003
Location: NB
Posts: 3,367
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Re: Temperature gauge shows hot, truck not
That there is good to know.
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1968 Chevy C10 307 3ott fleetside 1967 Chevy C/10 V8, 3spd, fleetside lwb.Sold 1967 Chev C/10 step, 383, M21. SOLD |
11-07-2006, 06:15 PM | #8 |
Questionable
Join Date: Mar 2005
Location: Atlanta
Posts: 13,373
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Re: Temperature gauge shows hot, truck not
It's possible the sending unit could be toast too, right?
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11-07-2006, 11:03 PM | #9 |
Outlandish Trends - FL
Join Date: Jul 2005
Location: Orlando
Posts: 1,396
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Re: Temperature gauge shows hot, truck not
I'd say the wire is grounding out also. I had that happen to me. When my sending unit went bad my temp gauge stayed cold and didn't move at all.
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11-07-2006, 11:29 PM | #10 |
Spanked once
Join Date: Oct 2006
Location: Intheshop, Indiana
Posts: 969
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Re: Temperature gauge shows hot, truck not
I have the same problem and mine is not shorted, where is the resistor you speak of?
Richard |
11-08-2006, 07:49 AM | #11 | |||
Union Electrician
Join Date: Feb 2005
Location: Louisville, Ky.
Posts: 3,354
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Re: Temperature gauge shows hot, truck not
on the back of the temp gauge. There will be a piece of wire mesh or porcelian between two of the studs, that is the resistor
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69 Custom-10 SWB FLEETSIDE 350/350 TH Dropped 3.5/5.5" Help support the board->HERE Board vendors -> Vendors list Zip:40272 Big Sandy Survivor... Quote:
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11-09-2006, 08:48 AM | #12 |
Registered User
Join Date: Apr 2003
Location: NB
Posts: 3,367
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Re: Temperature gauge shows hot, truck not
Well I fixed mine. When switching over to 7 gauge dash I put the temp wire on the "now dead" oil (blue) line. oops.
Works good now thanks.
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1968 Chevy C10 307 3ott fleetside 1967 Chevy C/10 V8, 3spd, fleetside lwb.Sold 1967 Chev C/10 step, 383, M21. SOLD |
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