Bench testing rally gauges

KudaKid said

So if you have a bad IVR, I guess you are changing the FUEL gauge. I have an issue with some of the gauges losing power and then coming back. Since I have my bezel out for re chroming I was looking to change the voltage regulator and now found out with the Rallye gauge setup it is par of the gauge. Just asking, what is the capacitors function other than the obvious ?

Click to expand...

The IVR powers the Fuel, Oil Pressure and Coolant Temperature gages.
It's not a true regulator. It rapidly switches on/off creating the equivalent of 5 Volts as far the instruments are concerned but there are some sublte differences compared with a constant on 5 Volts.
Anyway its an electrically noisy process. The capacitor makes it less so. We could see what Chrysler says if it also helps steady the power supply out. Redfish probably knows.