Isspro EGT stopped working

[joe308]

I've had my isspro egt gauge installed for several years now with no problems but it recently stopped working. It does not home or move when the key is turned on like it used to. I can't find the paperwork but I believe it's a model r3807 with the white face to match my 03 stock gauges. Using a test light grounded to the *frame I can find voltage on three of the four back terminals when the ign key is on (grey green and white) the fourth yellow one does not read any voltage. The backlight also works fine. Does this mean the gauge is bad or do I need to troubleshoot further? Thanks!

 

[EDankievitch]

Check your connections on the pyromometer I had the same issue turned out to be a bad connection where the manifold sensor meets the extension wires.

 

[joe308]

Thanks for the tip. I spoke to Isspro last month before I pulled it apart and they said if needle doesn't move at all when *the key is turned on and there is voltage at the terminals then its ptobably the box or the gauge. I'm going to give them a call on Monday.

 

[Shadrach]

I have used Isspro gauges in my last 3 trucks, total of 18 gauges and have found them to be very helpful if I had any issues. I have met their head engineer when he was up here in Canada drag racing and have toured their facility when I was in Portland. Great people to deal with.
David