Temperature Gauge Sending Unit
Thread Starter
Instructor
Joined: Nov 2002
Posts: 105
Likes: 7
From: Nicholasville KY
Temperature Gauge Sending Unit
I have a 69 350 and initially the temp gauge was maybe 120 fully hot. I grounded the gauge wire and it swung way past 250 almost pointing down. When I left it open (off the unit) it went under 100. A shop replaced the sending unit and said a "sender for a fan" had been installed. Now the gauge shows 230 to almost 250. Can this be corrected with a resistor? Or what would be the correct sender and source?
Burning Brakes
Joined: Dec 2021
Posts: 805
Likes: 260
I have a 69 350 and initially the temp gauge was maybe 120 fully hot. I grounded the gauge wire and it swung way past 250 almost pointing down. When I left it open (off the unit) it went under 100. A shop replaced the sending unit and said a "sender for a fan" had been installed. Now the gauge shows 230 to almost 250. Can this be corrected with a resistor? Or what would be the correct sender and source?
Race Director
Joined: Nov 2006
Posts: 13,068
Likes: 7,678
From: Sunshine Coast, Queensland, Australia
2025 C3 of the Year Finalist - Modified
2024 C3 of the Year Finalist- Modified
2022 C3 of the Year Finalist - Modified
Cruise-In VIII Veteran
Not certain a thermostat is the answer here.
First, get an I R temp sensor gun. Shoot the thermostat housing. What temp is it? If it agrees with your guage you have big issues.
If not, yes it can be corrected.
First, get an I R temp sensor gun. Shoot the thermostat housing. What temp is it? If it agrees with your guage you have big issues.
If not, yes it can be corrected.
