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Oil temp gauge install on 79 Vette

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Old 09-12-2017, 05:02 PM   #1
Vince J
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Default Oil temp gauge install on 79 Vette

Has anyone successfully install the factory 80-82 Oil Temp gauge on a 78 or 79 Vette? I want to replace the factory clock with an oil temp gauge.
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Old 09-13-2017, 03:02 PM   #2
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Yes...

You have to tape back the end of the pcb to keep it from hitting anything. When you remove your clock you'll find that the pcb has one ear that powers it up. So you must keep this out of the way when you do the install.

The cars with the oil temp gauge had a different pcb... We've got the correct boards out for a quote right now, but you can still use your old one.
This is one of the gerber file pictures that we sent out showing you the difference.


All you need is the gauge, the sender, the wire connector and three wires added. One for power, ground and ohms from the sender to the dash unit.

You install the wires to the new gauge in this fashion.



You can find the parts at these links.
Connector https://willcoxcorvette.com/corvette...onnector-80-82
Gauge with sender https://willcoxcorvette.com/corvette...re-gauge-81-82
Terminals for the connector https://willcoxcorvette.com/corvette...imp-on-locking

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Old 09-13-2017, 04:14 PM   #3
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Thank you! That's exactly what I needed to know! I already had my Willcox shopping cart with the items you listed.
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Old 09-13-2017, 04:16 PM   #4
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How long to the new PCB boards are made. I already have a new one ready to go in, but would rather put the new style in.
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Old 09-13-2017, 05:45 PM   #5
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There is currently no eta on the new boards... It could be six months. We are in the early stages of making this. I'd just run the old one. You can just remove the tab at the connector to keep this wire from getting power too, that would be the safest way.
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Old 09-13-2017, 07:19 PM   #6
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Ok Great. Thanks for the quick response.
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Old 10-12-2017, 01:10 PM   #7
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I have a test harness for the center gauge cluster. Which wires' should be connected to the power and ground and which wires control the lights and individual gauges?
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Old 10-12-2017, 11:25 PM   #8
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I have had an 81-82 oil temp gauge in the cluster where the clock was for 32 years since 1985 when I did the conversion. The gauge pod has not been out since then so I cannot remember what exactly I did to make it work which it has perfectly since 1985 but I do remember that I had to jump a wire to the neighboring gauge as a power source, a ground wire, and the sending wire from the sender which I located directly above the oil filter. Other than those changes, I reinstalled the oil pressure sending unit at the back of the intake behind the distributor. Has worked perfectly since 1985.....so I would assume what I did was done correctly....

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Old 10-13-2017, 12:54 AM   #9
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Quote:
Originally Posted by Vince J View Post
I have a test harness for the center gauge cluster. Which wires' should be connected to the power and ground and which wires control the lights and individual gauges?
I'm not sure I understand... If you are running the oil temp gauge it wires separately as shown above. If you are just wanting to know which wires in the connector run what????

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Old 10-13-2017, 01:03 AM   #10
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Yes, I am aware that the oil temp gauge has separate wires'. I have a test plug with wires so i can bench test the gauges and lights on the rest of the console. This diagram will help. Thank you.
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Old 10-15-2017, 11:02 AM   #11
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Installed all new gauges' from Willcox Corvette. Question on the fuel gauge. When I installed it I put the ceramic resistor back in. When I hooked it up it went way past full. I believe my tank is full but something doesn't seem right. Any thoughts?
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Old 10-15-2017, 06:08 PM   #12
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If you purchased a new gauge remove the resistor. Repro gauges have the reisitor buoilt into them. This installation instructions are in fine print but they tell you this. If you go to my tech site there is a blown up version that makes reading easier
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Old 10-15-2017, 06:10 PM   #13
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The reproduction gauges have the resistance built into them so you don't use the resistor the instructions are fine print but it tells you in the instructions to remove the resistor.

there's a larger version of the instructions on my text site that makes it easier to read
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Old 10-15-2017, 08:13 PM   #14
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Thank you. There were no instructions in the box. But there were in the other gauge boxes.
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Old 10-15-2017, 08:41 PM   #15
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Ok, So I just checked and removed the resistor and installed without it and burned the printed circuit board. So I have to order another one. Just so we are on the same page, I ordered all five gauges new. The Oil Temp gauge did not have the plastic piece to replace the resistor as well. Does that need a resistor or not? And if not both the Oil temp and fuel gauges did not come with the plastic piece to replace the resistor.
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Old 10-30-2017, 11:00 PM   #16
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I've replaced the factory clock on my 79 Vette with the later Oil temp gauge. I have the wiring all done. My question is where on the engine does the sending unit go?
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Old 10-31-2017, 01:44 AM   #17
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It goes into the block right above the oil filter (though you may find your oil pressure sender occupying this spot).


Last edited by StDomingos; 10-31-2017 at 01:56 AM.
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