Temp and gas gauge spike when ignition is first turned on

[Evan Frucht]

I just replaced my instrument cluster with another replacement that was in much nicer condition.

I noticed yesterday when I turned on the ignition the temp and gas needles spike all the way to the end for about 10 seconds and then fall back down to where I think they should be. (This didn't happen with the old cluster, but that one also had slightly lower temp and gas readings)

This might only happen when its warm.

Doesn't worry me too much but...

Just wanted to make sure, is this totally normal?

or a sign if a short, bad connection or component?

 

[MoparLeo]

Here is an article you may like:
https://www.allpar.com/history/mopar/electrical2.html

 

[twecomm]

Think you have a defective 5 Volt mechanical regulator since the 3 gauges you mention spike like that. Not sure where it is physically located in your car. Anyways, find what you need here.. https://www.rt-eng.com These are the best way to solve Mopar gauge voltage regulator problems. Don't run the car like that as frying all 3 of those gauges is possible !!

 

[R/T Boy 67]

Sounds like the voltage limiter. I would fix this a.s.a.p., as cooked gauges could result.

 

[Bob Sawyer]

What they said...voltage limiter.

 

[khryslerkid]

What they said...voltage limiter.

Should look something like this...

You could steal the one off your other cluster.

 

[Evan Frucht]

Ok well it just stopped doing that. And it was only when it was warm. I'll look into it. Thanks