Temp circut check?
Le Mans Master
Joined: Jan 2006
Posts: 9,192
Likes: 27
From: Boca Raton Florida
Disconnect the wire from the sender and ground it, the gauge should go full hot. That verifies the gauge and its wireing.
If the gauge does not move, then you willneed to dig into the dash panel.
If the gauge does not move, then you willneed to dig into the dash panel.
Thread Starter
Melting Slicks
Joined: Mar 2003
Posts: 2,512
Likes: 49
From: Franklin IN
Thank you sir! Do you know what the range of volts or amps is on this circut?
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,114
From: Crossville TN
The sender is a resistance unit. The colder it is, the more resistance. I can only assume that the meter is a voltage measuring device, but I don't know the specs on it. Maybe you could measure the resistance of the sender while it is still in the block...measure it cold and measure again hot. If you get a significant difference, the sender is probably good. They would probably fail in a "short" or "open" manner.
Le Mans Master
Joined: Jan 2006
Posts: 9,192
Likes: 27
From: Boca Raton Florida
The gauge is basically a voltmeter, in the circuit it reads the voltage at the sender. The sender is a variable resistor, cold is some 90 ohms I think, would have to dig a bit, brains can't hold all this info forever
Thread Starter
Melting Slicks
Joined: Mar 2003
Posts: 2,512
Likes: 49
From: Franklin IN
Thanks for the responses guys. That is pretty much as I thought. Maybe we can get someone that knows the ohm range of the of the circuit to step in. In addition to checking the sender I'd like to check the calibration of the Gage. If I knew the high and the low I could check both ends of the range by using a simple resistor or by presetting a pot with my multimeter. I may bite the bullet and buy a new sender from Letric Limited and ask them the range of it.
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,114
From: Crossville TN
The only way to calibrate the temp gauge accurately is to test the gauge and sender together. 12v. battery, gauge, sender and a pot of boiling water (212F, unless at altitude). If off, you would need to put a resistor in the circuit to compensate.
