1973 corvette temp sending unit
Thread Starter
Pro
Joined: Nov 2016
Posts: 729
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From: Kelowna British Columbia
1973 corvette temp sending unit
Having trouble with sending unit. I read the forum and tested ok the gauge and wire by grounding.
When testing sender with ohmeter I start out at 800 ohms and soon after starting engine it goes down to 0 and ends up at -1.5 ohms? I take it this means the unit is shot? Wanted to check before ordering a new one. Understand that it should read 600 ohms at 100 degrees and 85 ohms at 220 degrees.
When testing sender with ohmeter I start out at 800 ohms and soon after starting engine it goes down to 0 and ends up at -1.5 ohms? I take it this means the unit is shot? Wanted to check before ordering a new one. Understand that it should read 600 ohms at 100 degrees and 85 ohms at 220 degrees.
Race Director
Joined: May 2006
Posts: 18,648
Likes: 2,557
read this link curtesy of Willcox Corvette, has the ohms readings
http://repairs.willcoxcorvette.com/w...help-guide.pdf
http://repairs.willcoxcorvette.com/w...help-guide.pdf
Former Vendor
Joined: Aug 2006
Posts: 76,656
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From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Having trouble with sending unit. I read the forum and tested ok the gauge and wire by grounding.
When testing sender with ohmeter I start out at 800 ohms and soon after starting engine it goes down to 0 and ends up at -1.5 ohms? I take it this means the unit is shot? Wanted to check before ordering a new one. Understand that it should read 600 ohms at 100 degrees and 85 ohms at 220 degrees.
When testing sender with ohmeter I start out at 800 ohms and soon after starting engine it goes down to 0 and ends up at -1.5 ohms? I take it this means the unit is shot? Wanted to check before ordering a new one. Understand that it should read 600 ohms at 100 degrees and 85 ohms at 220 degrees.
Also know that if you change the sending unit out it will more than likely not read correctly with your gauge. If it doesn't don't panic, I made an adjustable resistor for the back of the gauge so you can balance the two together. https://willcoxcorvette.com/corvette...resistor-68-76
Willcox
