Engine/Transmission (1998.5 - 2002) Pryometer failing??

[jmos4]

Hi,



I have a 99 with an Autometer Pryometer, this morning it went to 0 while doing 40mph and stayed there for a few miles then came back to life



Do these go bad or do I have a loose connections?



not sure this is common but where it the first place to look engine or gauge?



thanks,

Jim

 

[NGuzik]

I would start at the gauge. I did a lot of research before I bought my gauges earlier this year and found people had problems with autometer gauges failing. How long has it been in the truck? If it were me I would swap out the gauge and see if that works... Good luck, nick

 

[BigPapa]

Mine did the same thing and I found that the previous owner that had installed the gauges had run the wires where the eyes on the wires from the thermocouple made contact occasionally. Pulled the gauge out, moved and insulated the eyes on the wires, and everything's been fine since. Autometer Sport Comp's.

 

[Mikey-KE7LBB]

I would bet a loose wire or bad contact. The gauge reads 0 when it's not hooked up.



A dead short would have it reading max temp... But I could be wrong!

 

[BigPapa]

Mine read "0" most of the time but would occasionally move up just a little. It was definitely shorted.

 

[Bill Stockard]

To check a thermocouple, disconnect the two leads going to the gauge at the thermocouple. Using a Digital Volt-Ohm Meter (DVOM), set the scale to millivolts and test across the two leads from the thermocouple for voltage when the thermocouple is warm (engine idling at normal temperature). If there is no voltage present, the thermocouple has more than likely failed. If there is voltage, then there may be a problem with the wire connections or the gauge. Thermocouples produce a small electrical charge depending on the heat present at the probe and the gauge measures that voltage.



Bill