What are the 2 sensor on the thermostat housing?

[CLi87]

Well, that's off. What does the gauge read on a cold engine? What is the resistance of the sender when cold/warm? I couldn't find a resistance value chart for the sender, but other option is to put the tan wire on another gauge after disconnecting the sender from that gauge (fuel, oil, trim), and see if the needle ends up in the same part of the gauge. The gauges are the same, they just use a different overlay depending on what they're measuring.

I'm thinking it must the sensor, I got a new one I can put in just waiting for PB blaster to loosen it up a bit, it's stuck on there tight. I switched the gauge out with the new gauge and it's also reading high so it must be the resistance reading is wrong from the sensor.

 

[Bondo]

I'm thinking it must the sensor, I got a new one I can put in just waiting for PB blaster to loosen it up a bit, it's stuck on there tight. I switched the gauge out with the new gauge and it's also reading high so it must be the resistance reading is wrong from the sensor.

Ayuh,.... Crazy thought,...... Is the T-stat housin' Solidly Grounded,..??..??

ohm it to the battery, 'n see,.....

 

[nola mike]

Ayuh,.... Crazy thought,...... Is the T-stat housin' Solidly Grounded,..??..??

ohm it to the battery, 'n see,.....

Poor ground should read low (higher resistance), though who knows, it's a known issue and poor grounds do funny things

 

[Scott Danforth]

Well I spoke too soon, my temp gauge works but it's reading about 60-70 degrees high, it was working fine previously, gauge go bad suddenly?

since it works on resistance. you could have some corrosion between the connectors that are affecting your gauge reading