Temp Gauge problem again - The 1947 - Present Chevrolet & GMC Truck Message Board Network

MattyBs71 · 06-26-2008, 08:27 PM

Hi all,

Background info:
I just picked up some gauges, not sure if they all work. Anyway I converted from idiot lights to gauges by moving the wires in the instrument cluster as GMCPaul instructed on his web page of tips. I picked up a new sending unit for gauges. I also picked up a new Printed Circut board to replace the one on the gauges I got as it had a burned spot.

Here is the problem, the temp gauge has been steadily moving up towards hot and has never gone back down to to cold. Yesterday was the first day I drove the truck since I did the upgrade. I get in the truck this AM and the temp is still at the same position it was last night. Also when I installed the gauge it wasn't reading cold it was up a bit on the temp and has just moved up more and never back to cold.

What's wrong?

Another quick question. Does the Fuel gauge go to empty when the truck is off and key out? Because mine is reading full all the time, even when the truck is off.

70LonghornCST · 06-26-2008, 08:40 PM

There are small, flat resistors that are needed on the back of those gauges; are they present? If not, I have a couple I could send you no charge.

MattyBs71 · 06-27-2008, 09:57 PM

Quote:

Originally Posted by 70LonghornCST

There are small, flat resistors that are needed on the back of those gauges; are they present? If not, I have a couple I could send you no charge.

Yes the resistors are there.

acl · 06-28-2008, 09:01 AM

don't want to change topic but what do this resistors look like. can't get temp gauge to work as well

72BLUZ · 06-28-2008, 10:18 AM

Quote:

Originally Posted by acl

don't want to change topic but what do this resistors look like. can't get temp gauge to work as well

a little flat piece of ceramic with copper center and 2 holes to connect to the gauge

FXJETS · 06-30-2008, 11:49 PM

Check the sending wire. Ground the wire and check the needle swing. then open the connection and the needle shoud swing in the oppisite direction. if not the gauge is bad, or the resister is bad.

Longhorn Man · 06-30-2008, 11:59 PM

to add to that, you need the ignition switch to be on.
Plus, this will test the whole system, except the sending unit. The wire, fuse, PCB, guage, resistor... etc.

MattyBs71 · 07-01-2008, 10:50 AM

I figured it out, a bad fuse that runs to the cluster on the fuse panel under the dash, this fuse fixed my fuel gauge and temp gauge problems!

06-26-2008, 08:27 PM	#1
MattyBs71 Registered User Join Date: Apr 2008 Location: Buckley, Washington Posts: 333	Temp Gauge problem again Hi all, Background info: I just picked up some gauges, not sure if they all work. Anyway I converted from idiot lights to gauges by moving the wires in the instrument cluster as GMCPaul instructed on his web page of tips. I picked up a new sending unit for gauges. I also picked up a new Printed Circut board to replace the one on the gauges I got as it had a burned spot. Here is the problem, the temp gauge has been steadily moving up towards hot and has never gone back down to to cold. Yesterday was the first day I drove the truck since I did the upgrade. I get in the truck this AM and the temp is still at the same position it was last night. Also when I installed the gauge it wasn't reading cold it was up a bit on the temp and has just moved up more and never back to cold. What's wrong? Another quick question. Does the Fuel gauge go to empty when the truck is off and key out? Because mine is reading full all the time, even when the truck is off.

06-26-2008, 08:40 PM	#2
70LonghornCST Moderator Join Date: Jun 2008 Location: Modesto, CA Posts: 5,775	Re: Temp Gauge problem again There are small, flat resistors that are needed on the back of those gauges; are they present? If not, I have a couple I could send you no charge. __________________ 2018 Chevy Crew Cab 2006 Impala SS 1965 Plymouth Sport Fury 1970 Chevy Longhorn Bucket Seats Shoulder Belts Front Tow Hooks Factory Air Factory Speedwarning, Tach & Vaccum Factory Tilt CST Package AM/FM Radio Bumper Guards Richard 70 Longhorn CST Build Adding an AM/FM Decal Last edited by 70LonghornCST; 06-26-2008 at 08:42 PM.

06-28-2008, 09:01 AM	#4
acl Registered User Join Date: May 2007 Location: Emporia, kansas Posts: 300	Re: Temp Gauge problem again don't want to change topic but what do this resistors look like. can't get temp gauge to work as well

06-30-2008, 11:49 PM	#6
FXJETS Registered User Join Date: May 2007 Location: Vista, CA Posts: 5	Re: Temp Gauge problem again Check the sending wire. Ground the wire and check the needle swing. then open the connection and the needle shoud swing in the oppisite direction. if not the gauge is bad, or the resister is bad.

06-30-2008, 11:59 PM	#7
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Re: Temp Gauge problem again to add to that, you need the ignition switch to be on. Plus, this will test the whole system, except the sending unit. The wire, fuse, PCB, guage, resistor... etc.

07-01-2008, 10:50 AM	#8
MattyBs71 Registered User Join Date: Apr 2008 Location: Buckley, Washington Posts: 333	Re: Temp Gauge problem again I figured it out, a bad fuse that runs to the cluster on the fuse panel under the dash, this fuse fixed my fuel gauge and temp gauge problems!



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