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#1 |
Registered User
Join Date: Jan 2015
Location: Ventura, CA
Posts: 818
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temp gauge
How can I test my temp gauge to see if it is working? I don't know if its the gauge or sending unit, but it never moves.
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..................... ____ .........________//__{\_____ ,,,,,,,/__(O)___//___/__(O)_/ 1970 C20 -_--_--_- ______ _--_--_- /___|__\____ -_--_-_ |_(0)|__|_(0)] 1972 K5 |
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#2 |
Registered User
Join Date: Feb 2014
Location: Palmerston North New Zealand
Posts: 58
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Re: temp gauge
With the key on pull the temp gauge wire off the sender and earth it out on the engine check if the gauge is full over to the hot side on the needle if so the gauge is ok if the needle on the gauge is stuck on cold the gauge could be stuffed as long there's no break in the wiring
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"I ain't got no time for side tracks!" 69 R/T Charger 72 C10 Chevrolet 85 302 Jaguar 99 955 Daytona 10 1050 Speed Triple |
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#3 | |
Registered User
Join Date: Jan 2015
Location: Ventura, CA
Posts: 818
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Re: temp gauge
Quote:
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..................... ____ .........________//__{\_____ ,,,,,,,/__(O)___//___/__(O)_/ 1970 C20 -_--_--_- ______ _--_--_- /___|__\____ -_--_-_ |_(0)|__|_(0)] 1972 K5 |
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#4 |
Registered User
Join Date: Feb 2014
Location: Palmerston North New Zealand
Posts: 58
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Re: temp gauge
No worries hope you can sort it out, nice to see you like 2 wheels as well
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"I ain't got no time for side tracks!" 69 R/T Charger 72 C10 Chevrolet 85 302 Jaguar 99 955 Daytona 10 1050 Speed Triple |
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#5 |
Registered User
Join Date: Jul 2015
Location: Dallas, TX
Posts: 167
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Re: temp gauge
May I add one question? It seems wasteful to start an entire new thread for this one question...
Can anyone advise on what wires should be connected to the temp gauage? The green one coming from the sender on the block, but what else? Is there anything else that should be plugged in to the back of the temp gauge? |
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#6 |
Registered User
Join Date: Jan 2015
Location: Ventura, CA
Posts: 818
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Re: temp gauge
Should just be the green wire.
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..................... ____ .........________//__{\_____ ,,,,,,,/__(O)___//___/__(O)_/ 1970 C20 -_--_--_- ______ _--_--_- /___|__\____ -_--_-_ |_(0)|__|_(0)] 1972 K5 |
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#7 |
Registered User
Join Date: Jul 2015
Location: Dallas, TX
Posts: 167
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Re: temp gauge
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#8 |
Registered User
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Location: New River Arizona
Posts: 1,180
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Re: temp gauge
It is a ground wire there is no power at the sender. You can ground it and the gauge will move up.
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#9 |
Registered User
Join Date: Jul 2015
Location: Dallas, TX
Posts: 167
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Re: temp gauge
Sorry, I'm asking about the gauge. If a ground wire goes to it, I assume a power wire must as well. But my gauge has no wires going to it other than the green sender wire.
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#10 | |
Registered User
![]() Join Date: Apr 2012
Location: Stillwater, Oklahoma
Posts: 874
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Re: temp gauge
Quote:
Yes, the gauge itself is wired to the printed circuit. The green wire (gauge terminal) goes to the sender and the other gauge terminal is to 12v.
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1971 C/10 SWB, 15x8 Rallys, 4.5" X 7" static drop, C-notched, 350/350, 3.73 Posi. .........A 383 and Gear Vendors are on my bucket list. 1972 GMC 4X4 K1500 Survivor - Sold No matter what problems life throws at you, your time on Earth can be incredibly fulfilling and rewarding.....if you just lower your expectations. -Phil Dunphy Last edited by Sklptrljay; 07-21-2015 at 07:11 PM. |
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#11 |
Msgt USAF Ret
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Location: Kalamazoo, Michigan
Posts: 8,714
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Re: temp gauge
Here's a dash gauge wiring layout. The purple lines feed the fuel gauge and the temp gauge from terminal 3 on the cluster plug. The wire from the temp sender runs from the sender to the no.6 terminal on the cluster plug. The green line feeds the gauge. There are no wires to the gauges.
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VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative. |
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#12 |
Registered User
Join Date: Jul 2015
Location: Dallas, TX
Posts: 167
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Re: temp gauge
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#13 | |
Msgt USAF Ret
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Location: Kalamazoo, Michigan
Posts: 8,714
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Re: temp gauge
Quote:
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VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative. |
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#14 |
Registered User
Join Date: Jul 2015
Location: Dallas, TX
Posts: 167
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Re: temp gauge
But the sending unit wire doesn't connect to anything? Does it connect to the gauge through the circuit board via pin #6?
If so, that's what I've been missing. I was looking for the sender wire to be connecting to the post. Last edited by centuryhouse; 07-22-2015 at 09:54 AM. |
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#15 |
Registered User
Join Date: Nov 2014
Location: Austin
Posts: 749
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Re: temp gauge
Yes, per the wire diagram (post #11) the sending wire connects to the cluster wire connector (pin #6) then to the gauge via the printed circuit "board". Make sure the printed circuit trace is not broken (either or both sending and power).
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#16 |
Registered User
Join Date: Jul 2015
Location: Dallas, TX
Posts: 167
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Re: temp gauge
Good info, thanks! All looks good, and I just did the test that was mentioned of touching the sending unit wire to the block - when I did it pegged the Temp gauge needle, so I now know the connections are all good.
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#17 |
Registered User
Join Date: Nov 2007
Location: Los Angeles, CA
Posts: 84
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Re: temp gauge
SO, when I touch my properly grounded test light to the #3 purple feed pin on the connector, the test light should go on.... right? And if so; in what ignition key position ---> ignition on? ... accessory on?... both?.. with engine running on or off?
Both my temp gauge (new) & gas (original) don't work & appear to be "dead" & I've been messing with this for toooo long.... ![]()
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1970 CST long bed Fleetside |
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#18 |
Registered User
Join Date: Nov 2014
Location: Austin
Posts: 749
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Re: temp gauge
Yes, it seems that #3 would have power with the key in the run position only. But, I would need to check my factory wire diagram which is not handy at the moment. If you don't get 12v at the wire pigtail contact, then this would explain a non function temp and fuel gauge as they both get power from terminal #3.
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#19 |
Msgt USAF Ret
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Location: Kalamazoo, Michigan
Posts: 8,714
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Re: temp gauge
The pink ignition wire from the key switch runs to a junction with three other wires as shown in the first diagram. It is the 5th wire from the top. These diagrams are for the charging light cluster but the pink wire are the same. On the cluster plug for the charging light the pink wire runs to terminal 7.
It runs to the fuse panel to power the cluster pnl fuse. [ATTACH] From the fuse panel it runs to the cluster plug to terminal 3 and becomes hot when the key is turned on.
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VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative. |
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#20 |
Senior Member
![]() Join Date: Aug 2008
Location: Cedar Park, Texas
Posts: 7,496
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Re: temp gauge
I went through all of the trials and tribulations of trying to get my temp gauge working a while back. Turns out that none of the over the counter parts store sending units have the right resistance. I bought one of these and now it works like a champ.
http://www.ebay.com/itm/NEW-gauge-te...638874&vxp=mtr |
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#21 | |
Registered User
Join Date: Jul 2015
Location: Dallas, TX
Posts: 167
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Re: temp gauge
Quote:
That isn't the connector type my temp sender has. What does the other end of this (the wire end that connects to this sender) look like? |
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#22 |
Senior Member
![]() Join Date: Aug 2008
Location: Cedar Park, Texas
Posts: 7,496
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Re: temp gauge
The wiring connector is a spade connector. It slides on at a 90 degree andle instead of straight on lie you are probably used to seeing.
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#23 |
Registered User
Join Date: Jul 2015
Location: Dallas, TX
Posts: 167
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Re: temp gauge
Excellent, thanks. I've been having problems finding an appropriate replacement (with the smaller 3/8" threading) that has a straight tab type like mine. It sounds like I could use this type and just replace the wire end with a 'spade' type connector.
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#24 |
Registered User
Join Date: Nov 2007
Location: Los Angeles, CA
Posts: 84
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Re: temp gauge
Thank you for your help!
I checked the plug terminal (disconnected from the panel) with my test light & do NOT get power at the #3 pin. But I DO get power at the cluster pin, when the headlight switch is pulled on. I'm having difficulty following the schematics: I'm not seeing the "junction" you mentioned where the pink wire & two others run to. Also a bit confused with pink wire vs purple wire. I have a '70 C10 CST. The #3 wire in my terminal is pink(ish.) All the wires coming from the ignition switch are bundled/taped together and lead up, over & down to the top of my fuse box, appearing to run down behind it. The pink wire coming out of the connector on the firewall side of the fuse box runs to the starter. If The pink wire powers the cluster lights (as it should) but is not powering the #3 pin, where should I look to find the break? Also: I don't know if this is related (doubtful?) but my altimeter reads backwards --> When the headlights are on without the engine running the needles leans right to "C." When I start the engine running, the needle leans left to "D" then after eventually returns to the center line. Here are some shots of what I'm dealing with: ![]() ![]() ![]()
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1970 CST long bed Fleetside |
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#25 |
Registered User
Join Date: Jul 2015
Location: Riverside, Ca.
Posts: 88
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Re: temp gauge
I'm in need of a little help on the subject too. My gauge only rises to the second line of the cold zone and fluctuates down and back up to the same point. I've tested my gauge by grounding it and it goes to hot. I've got a reading of 333 ohms after a it is warm and the gauge is still just off the first cold line. According to a resistance/temp chart it was right around 175-180 degrees. Any help would be appreciated.
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