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 > General Truck Forums > Electrical

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 11-05-2014, 03:36 PM   #1
TBONE1964
Cluster King
 
TBONE1964's Avatar
 
Join Date: Nov 2012
Location: Junction City, OR
Posts: 4,394
Temp gauge pegged full hot? Here is the fix

It has been covered before but I thought I would cover it again. It has come to my attention with some of my cluster builds that the temp gauge is pegging full hot once installed.

For this reason, I have changed my method of testing gauges for cluster builds.

If you test a temp gauge out of the cluster, you have to ground the lower center terminal on the gauge. Once the gauge is installed in the tin and then into the cluster, the gauge relies on grounding through the tin. From the factory, they used a one way push on retainer that had two purposes. It held the gauge in place for assembly and also it acted as a ground from the gauge to the tin.

Once the cluster is installed in the dash and the connector pluged in, it is possible that the gauge will peg full hot because the lower center terminal is not grounded.

The simple fix is to make a short ground strap and install it as shown in the photo I have attached. It can be made of 14 gauge wire with eyelets on both ends or a short braided ground strap. With either option the eyelet size is a #6.

Please let me know if you have any questions on this. I understand it has been discussed and covered in the past but wanted to update this.

All of my future cluster builds will include this ground wire to prevent any issues after cluster installation.

Take care,
Tom
Attached Images
 
TBONE1964 is offline   Reply With Quote
Old 11-06-2014, 11:15 PM   #2
jtinpdx
Registered User
 
Join Date: Aug 2014
Location: Portland, OR
Posts: 106
Re: Temp gauge pegged full hot? Here is the fix

Quote:
Originally Posted by TBONE1964 View Post
It has been covered before but I thought I would cover it again. It has come to my attention with some of my cluster builds that the temp gauge is pegging full hot once installed.

For this reason, I have changed my method of testing gauges for cluster builds.

If you test a temp gauge out of the cluster, you have to ground the lower center terminal on the gauge. Once the gauge is installed in the tin and then into the cluster, the gauge relies on grounding through the tin. From the factory, they used a one way push on retainer that had two purposes. It held the gauge in place for assembly and also it acted as a ground from the gauge to the tin.

Once the cluster is installed in the dash and the connector pluged in, it is possible that the gauge will peg full hot because the lower center terminal is not grounded.

The simple fix is to make a short ground strap and install it as shown in the photo I have attached. It can be made of 14 gauge wire with eyelets on both ends or a short braided ground strap. With either option the eyelet size is a #6.

Please let me know if you have any questions on this. I understand it has been discussed and covered in the past but wanted to update this.

All of my future cluster builds will include this ground wire to prevent any issues after cluster installation.

Take care,
Tom
Thanks for all of your contributions, Tom! Awesome to have you on here.

-Jeff
jtinpdx is offline   Reply With Quote
Old 11-07-2014, 02:00 AM   #3
VetteVet
Msgt USAF Ret
 
VetteVet's Avatar
 
Join Date: Jan 2005
Location: Kalamazoo, Michigan
Posts: 7,504
Re: Temp gauge pegged full hot? Here is the fix

Here's a picture to confirm your post Tom. I will add that the wire from the sending unit will also cause the gauge to go hot if it gets shorted to ground. Thanks Tom for your pics and advice. Great job.


Name:  temp guge.jpg
Views: 806
Size:  36.0 KB



Name:  temp gauge.jpg 2.jpg
Views: 627
Size:  79.6 KB
__________________
VetteVet

metallic green 67 stepside
74 corvette convertible
1965 Harley sportster
1995 Harley wide glide

Growing old is hell, but it beats the alternative.
VetteVet is offline   Reply With Quote
Old 11-07-2014, 10:28 AM   #4
Daddy'O
Survivor of Menopause
 
Daddy'O's Avatar
 
Join Date: Jan 2012
Location: Whitesboro, Texas
Posts: 921
Re: Temp gauge pegged full hot? Here is the fix

Good job Tom and VetteVet -

This very problem almost whipped my butt a couple of years ago.
__________________
Cheers - Wayne

Our Shop Build - http://67-72chevytrucks.com/vboard/s...d.php?t=620966
'55 Wagon Build - http://67-72chevytrucks.com/vboard/s...d.php?t=689157
1971 Cheyenne Super Ochre/White LWB 350 Auto - my son's truck "Nancy"
1972 GMC K2500 Custom 4X4 Olive LWB 400 SB 4-speed -"Greenie" - Restoration to begin after the '55
Nothing sucks more than that moment during an argument when you realize you're wrong.
Daddy'O is offline   Reply With Quote
Old 11-07-2014, 12:53 PM   #5
TBONE1964
Cluster King
 
TBONE1964's Avatar
 
Join Date: Nov 2012
Location: Junction City, OR
Posts: 4,394
Re: Temp gauge pegged full hot? Here is the fix

Quote:
Originally Posted by jtinpdx View Post
Thanks for all of your contributions, Tom! Awesome to have you on here.

-Jeff
Hi Jeff, Thank you as well. I am glad your temp gauge issues are resolved and everything is working. It is my pleasure to help those that would be reluctant to do it themselves.

Take care,
Tom
TBONE1964 is offline   Reply With Quote
Old 11-07-2014, 12:57 PM   #6
TBONE1964
Cluster King
 
TBONE1964's Avatar
 
Join Date: Nov 2012
Location: Junction City, OR
Posts: 4,394
Re: Temp gauge pegged full hot? Here is the fix

Quote:
Originally Posted by VetteVet View Post
Here's a picture to confirm your post Tom. I will add that the wire from the sending unit will also cause the gauge to go hot if it gets shorted to ground. Thanks Tom for your pics and advice. Great job.


Attachment 1320848



Attachment 1320847
As always Vette, your advise is a great addition to anyone who has electrical problems. Thanks you for your added information on this as it will help others with temp gauge issues.

Take care,
Tom
TBONE1964 is offline   Reply With Quote
Old 11-07-2014, 01:01 PM   #7
TBONE1964
Cluster King
 
TBONE1964's Avatar
 
Join Date: Nov 2012
Location: Junction City, OR
Posts: 4,394
Re: Temp gauge pegged full hot? Here is the fix

Quote:
Originally Posted by Daddy'O View Post
Good job Tom and VetteVet -

This very problem almost whipped my butt a couple of years ago.
Hi Wayne,

As funny as it may seem (or not funny) you may want to add ground straps on the clusters I built for you. Just to be on the safe side. It seems to be about 50/50 as if the temp gauge will work correctly with out it.

I am also trying to locate the correct push on retainers that the factory used. It would look much better than the ground strap but in a pinch the strap works well and does its job.

Hope all is well in TX and thank you for your contributions to this issue.

Take care,
Tom
TBONE1964 is offline   Reply With Quote
Old 11-07-2014, 01:39 PM   #8
Daddy'O
Survivor of Menopause
 
Daddy'O's Avatar
 
Join Date: Jan 2012
Location: Whitesboro, Texas
Posts: 921
Re: Temp gauge pegged full hot? Here is the fix

Hey Tom –

I had no luck finding the retainers either. I was lucky to have had a couple of trashed out clusters when I repaired the “restored” clusters I bought from another member a couple of years ago. I’m hoping to install one of the clusters I got from you into Nancy before Thanksgiving. I’ll take your advice and install the jumper to be on the safe side.

All is well here in Texas – Hoping all is well up in the great North West!
__________________
Cheers - Wayne

Our Shop Build - http://67-72chevytrucks.com/vboard/s...d.php?t=620966
'55 Wagon Build - http://67-72chevytrucks.com/vboard/s...d.php?t=689157
1971 Cheyenne Super Ochre/White LWB 350 Auto - my son's truck "Nancy"
1972 GMC K2500 Custom 4X4 Olive LWB 400 SB 4-speed -"Greenie" - Restoration to begin after the '55
Nothing sucks more than that moment during an argument when you realize you're wrong.
Daddy'O is offline   Reply With Quote
Old 05-08-2015, 10:50 AM   #9
elf w/capital T
Registered User
 
Join Date: Feb 2011
Location: North Carolina
Posts: 919
Re: Temp gauge pegged full hot? Here is the fix

Tom, you sir are awesome, had my project running at idle and temp gauge was pegged, I knew I had the tin grounded but doing the little jumper is way better than the little retainer clip/washer. Plus. I got the battery gauge, your workk is great! Thanks!
elf w/capital T is offline   Reply With Quote
Old 05-08-2015, 11:17 AM   #10
shawno72
C/10 junkie
 
shawno72's Avatar
 
Join Date: Nov 2010
Location: Stockton Ca
Posts: 9,146
Re: Temp gauge pegged full hot? Here is the fix

Great info as always. Thank you!
__________________
Shawn

70 LWB C10 current driver/project
http://67-72chevytrucks.com/vboard/s...d.php?t=663051
68 SWB C10 Work in progress.....SOLD
http://67-72chevytrucks.com/vboard/s...d.php?t=559520
72 LWB C10 Sold
71 LWB C10 Sold
68 LWB C10 CST Sold


http://youtu.be/kbB0QrBIs9k

My mom always had the best advice. It was just a tad late. After a fall that involved blood, she'd say....."Careful!"
shawno72 is offline   Reply With Quote
Old 02-23-2017, 07:47 PM   #11
dirish
Senior Member
 
dirish's Avatar
 
Join Date: Dec 2012
Location: Heart of Tennessee
Posts: 839
Re: Temp gauge pegged full hot? Here is the fix

I know it's an old post but I spent all day putting a brand new cluster in and the temp pegged out hot. Knowing it wasnt. I searched a few minutes to find this post, took me about 10 minutes to fix my cluster! thank you very much!!
dirish is offline   Reply With Quote
Old 02-23-2017, 08:51 PM   #12
TBONE1964
Cluster King
 
TBONE1964's Avatar
 
Join Date: Nov 2012
Location: Junction City, OR
Posts: 4,394
Re: Temp gauge pegged full hot? Here is the fix

Quote:
Originally Posted by dirish View Post
I know it's an old post but I spent all day putting a brand new cluster in and the temp pegged out hot. Knowing it wasnt. I searched a few minutes to find this post, took me about 10 minutes to fix my cluster! thank you very much!!
GREAT!!! Glad it helped you.

Take care,
Tom
TBONE1964 is offline   Reply With Quote
Old 02-23-2017, 09:05 PM   #13
dirish
Senior Member
 
dirish's Avatar
 
Join Date: Dec 2012
Location: Heart of Tennessee
Posts: 839
Re: Temp gauge pegged full hot? Here is the fix

Quote:
Originally Posted by TBONE1964 View Post
GREAT!!! Glad it helped you.

Take care,
Tom
Hey Tom, searching. .... can I do that with gas gauge.
It was fine till I changed clusters todY. Can I use bottom pin and ground like temp guage?
Thanks in advance!
dirish is offline   Reply With Quote
Old 02-24-2017, 02:10 AM   #14
TBONE1964
Cluster King
 
TBONE1964's Avatar
 
Join Date: Nov 2012
Location: Junction City, OR
Posts: 4,394
Re: Temp gauge pegged full hot? Here is the fix

Quote:
Originally Posted by dirish View Post
Hey Tom, searching. .... can I do that with gas gauge.
It was fine till I changed clusters todY. Can I use bottom pin and ground like temp guage?
Thanks in advance!
What exactly is the gauge doing now? How much gas is in the tank? Do you have a ohm/volt meter?

Let me know and I can walk you through finding the cause. How does everything else on the cluster work? Lights, temp gauges , turn signal indicators?

And yes you can ground from that center lug on the fuel gauge. Very rarely is ground an issue on the cluster if other things are working OK.

Double check the connector and circuit board where it plugs in. Make sure all of the brass contact are in the correct position and none of them are touching or folded over onto another. You can use super glue to put them back into position if needed.

Hope this helps,
Tom
TBONE1964 is offline   Reply With Quote
Old 02-24-2017, 04:58 AM   #15
dirish
Senior Member
 
dirish's Avatar
 
Join Date: Dec 2012
Location: Heart of Tennessee
Posts: 839
Re: Temp gauge pegged full hot? Here is the fix

I had to grouND temp. All else works good. I will heck my plug when I get home. Thank You!
dirish is offline   Reply With Quote
Old 02-25-2017, 02:55 AM   #16
a1vintage69
Senior Member
 
a1vintage69's Avatar
 
Join Date: Apr 2015
Location: Redding, Ca.
Posts: 1,112
Re: Temp gauge pegged full hot? Here is the fix

Quote:
Originally Posted by TBONE1964 View Post
GREAT!!! Glad it helped you.

Take care,
Tom
Hi Tom, This question is off subject but thought I would ask because I know a lot of guys will be interested. Do you restore the chrome on wood grain bezels or know anybody that does? Mine is faded down to the black in spots and all the nos bezels with wood grain are silver and not chrome. I would also be interested in a good original chrome wood grain bezel if you ever sell any. I just bought a speedminder/tach/vacum cluster from a member today and may want to restore it to good driver quality with my wood grain bezel for my Super. I would like to know what an average restore could cost just a ball park guess. any help will be much appreciated. thank you, Steve
a1vintage69 is offline   Reply With Quote
Old 02-25-2017, 11:12 AM   #17
TBONE1964
Cluster King
 
TBONE1964's Avatar
 
Join Date: Nov 2012
Location: Junction City, OR
Posts: 4,394
Re: Temp gauge pegged full hot? Here is the fix

Quote:
Originally Posted by a1vintage69 View Post
Hi Tom, This question is off subject but thought I would ask because I know a lot of guys will be interested. Do you restore the chrome on wood grain bezels or know anybody that does? Mine is faded down to the black in spots and all the nos bezels with wood grain are silver and not chrome. I would also be interested in a good original chrome wood grain bezel if you ever sell any. I just bought a speedminder/tach/vacum cluster from a member today and may want to restore it to good driver quality with my wood grain bezel for my Super. I would like to know what an average restore could cost just a ball park guess. any help will be much appreciated. thank you, Steve
Hi Steve,

I will send you a PM with details.

Take care,
Tom
TBONE1964 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 01:48 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 1997-2013 67-72chevytrucks.com