Its on the green wire. (28 A)

[Jamel]

I was going through my gauges. While I was tracing wires and checking sending units, I ran across a something I don't know what it is.
It is in line with the main power wire from the key switch to the water temp and oil pressure gauge.

[Jamel]

I figured it out it's a mechanical voltage regulator.
Does any on know of a good replacement.

[Eric VanBuren]

That is a called a suppressor by IH, just a fancy name for a resistor. It was added to later vehicles to protect the CVR. The CVR should not be exposed to more than 18v and when a 10 si alternator's voltage regulator looses connection to the #2 terminal or it fails in a certain manner it can produce over 20v. So it is there to protect the CVR and gauges. As long as a test light lights up when connected to the gauge side of it it is working and probably should not be removed.

Since you are apparently trying to get your gauges working a little caveat do not ground the sender wires as a test of the system. Lots of people will tell you to do so and it can fry your gauge, yes sometime you can get away with it but other times you fry the gauge. Use your test light to complete the circuit when testing the system or search for gauge calibration and my name for a number of threads where I've walked people through testing and repairing their gauges.

[Jamel]

Thank you for the info.
You are right about Burning up some gauges by putting 12 volt hot wires and ground wires to them.
I took a delicate aproch tested everything with a multimeter and power probe "fancy test light".
The previous owner cut and spliced almost all the wires under the dash. So it's been a real treat cleaning everything up and making it work. So needless to say I will be putting some miles on my multimeter continuity testing " beep that one I need"

[Eric VanBuren]

A volt meter is useless for testing the gauges and I wouldn't recommend the fancy power probe either just a plain, old fashioned, dirt cheap, incandescent test light is the best and right tool for testing the gauge system.