The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 03-09-2016, 03:43 PM   #1
chris1htx
Registered User
 
Join Date: Jan 2013
Location: Houston, TX
Posts: 178
temp gauge

hello all,

my temperature gauge recently has been bouncing around erratically without cause. i thought the temperature wire sensor was loose and was causing it to bounce around but it wasn't. do you guys think its the gauge? or could it be something else causing it to bounce around.
chris1htx is offline   Reply With Quote
Old 03-09-2016, 03:52 PM   #2
chrismoore701
Registered User
 
chrismoore701's Avatar
 
Join Date: Dec 2004
Location: Highland, IN
Posts: 2,326
Re: temp gauge

Check to see if your wire meted against your exhaust
__________________
Chris
_______________________________
1979 Chevy Stepside SPORT
2018 Chevy Silverado, 39 years apart
My build 2008-2016. http://m.imgur.com/a/bURrE
chrismoore701 is offline   Reply With Quote
Old 03-09-2016, 04:17 PM   #3
chris1htx
Registered User
 
Join Date: Jan 2013
Location: Houston, TX
Posts: 178
Re: temp gauge

just checked, the wire seems to be intact
chris1htx is offline   Reply With Quote
Old 03-09-2016, 04:51 PM   #4
chrismoore701
Registered User
 
chrismoore701's Avatar
 
Join Date: Dec 2004
Location: Highland, IN
Posts: 2,326
Re: temp gauge

May need to pull your gauge out and check the grounding circuit
__________________
Chris
_______________________________
1979 Chevy Stepside SPORT
2018 Chevy Silverado, 39 years apart
My build 2008-2016. http://m.imgur.com/a/bURrE
chrismoore701 is offline   Reply With Quote
Old 03-09-2016, 08:15 PM   #5
Axle
Registered User
 
Axle's Avatar
 
Join Date: Jul 2011
Location: SW Ontario
Posts: 1,212
Re: temp gauge

Could be a bad sender.
Ground the sender wire and your guage should peg. If you want to really check it out, get about a 200 ohm resistor, ground one end, and attach the other end to the sender wire. Your guage should be steady around 200ish degrees (give or take, doesn't matter what it reads, but that should give you a scale reading) and go for a drive. If the needle stays put, your guage and wiring is just fine.

Alex.
Axle is offline   Reply With Quote
Old 03-13-2016, 02:08 PM   #6
chris1htx
Registered User
 
Join Date: Jan 2013
Location: Houston, TX
Posts: 178
Re: temp gauge

okay so i bought a new gauge because the old one turned out to be bad. installed the new one and thought it would start working correctly but it did not move at all. tried it again the next day thought maybe it just needed to settle in and it began moving, the needle moved to the hot side and stayed there. i would rev the engine a little bit and the needle would start going down but as soon as i stopped revving it would go back to hot. i took the temp wire off did the same thing and had the same results. any ideas on what it could be? the printed circuit seems to be okay, but should i change it?
chris1htx is offline   Reply With Quote
Old 03-13-2016, 04:21 PM   #7
barry1982
Registered User
 
Join Date: Oct 2015
Location: Waskatenau, Alberta
Posts: 259
Re: temp gauge

I too would test/replace the sending unit before messing with the printed circuit.
barry1982 is offline   Reply With Quote
Old 03-13-2016, 07:42 PM   #8
Axle
Registered User
 
Axle's Avatar
 
Join Date: Jul 2011
Location: SW Ontario
Posts: 1,212
Re: temp gauge

Why don't you test out like I outlined? But at this point, might as well just change the sender.
Axle is offline   Reply With Quote
Old 03-13-2016, 09:55 PM   #9
esbstuff
Registered User
 
Join Date: Jun 2011
Location: St Robert, Mo
Posts: 730
Re: temp gauge

Quote:
Originally Posted by Axle View Post
Why don't you test out like I outlined? But at this point, might as well just change the sender.
Try sender first...
esbstuff is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 02:22 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com