Isspro Pyro died....

[thrashingcows]

Last night while driving home after a movie with my family, the Pyro decided to stop working. I tried hooking and hooking the leads from the Thermocoupler last night, dug under the dash to see if the power and ground were still hooked up...everything looked fine.

So after i came in from the monsoon rains...of course...I dug around on-line and found a PDF file on how to test the early Isspro EV gauge system.

Here is a link for others....

http://www.isspro.com/TROUBLESHOOTIN...leshooting.pdf

Tested everything this morning, and it seemed that the thermocoupler was the culprit. So went down to BD diesel...yup they are 3 minutes from my house... Bought a new T-coupler, and when I got home I tested the new T-coupler and it gave me the exact same readings as my old one.

So the problem clearly was elsewhere. After a little digging and closer inspection I found one of the crimped spade terminals on the wiring off the amplifier had corrosion. Pulled the old spade terminal, cleaned up the wiring and installed and new connector...works like a charm now!!

And just in case someone is testing their T-coupler using the info in that PDF file. The resistance they say you should be getting off the cold T-coupler should be less then 1ohm. My used T-coupler, and the new one both read 3.0 to 3.5 Ohms.

Also the voltage from the amplifier, to the gauge...white and grey wires, should show .8V...mine was .34V and it works fine.

[RCCUMMINS89]

Good info... I've recently had the same issue with my Autometer gauge.... went through their trouble shooting stuff and even they said "pyrometer" or "harness".... in my case it turned out to be the gauge.

Point from my rambling... sometimes their trouble shooting stuff isn't correct.