Topic: rpm guage working on and off ?

[cronic 4x4]

Truck is a 1985 22re and today the rpm gauge starting working periodically also the charge light and handbrake light are now on and the auto AT temp this truck has a 5 speed swap and I have never seen this light come on and the swap was done 5 years ago. I did just hook up a radio could this be the issue that caused the problems. I drove the truck all day with the charge light on and it never died I have a yellowtop (2 years old) with new terminals also added when I put in the stereo the other day, so I dont think its a battery issue or connection issue at the battery.

[emsvitil]

Put a voltmeter on the battery when it's running and see what the voltage is.............

[jimbo74]

you probably jarred some connector, or pulled out a wire from somewhere when installing the radio

[cronic 4x4 [OP]]

It was the alternator gone after that was causing all the issues.

[SloCrawler]

mine does the same with the rpm guage, just bang on the dash and mine works again. haha

[cronic 4x4 [OP]]

Funny thing is the rpm gauge is still not working all the time again. I am also figuring it is a loose wire.

[CrazyYota]

Funny thing is the rpm gauge is still not working all the time again. I am also figuring it is a loose wire.

my 83 does the same thing? some days it works and some days it wont?

[rattlecanpaint]

Pull your cluster out and unplug and replug the connectors.  My first truck was an '83 and the tach didn't work when I bought it.  Had to pull the cluster to get to the headlight relays and when I put it back together, the tach worked.  It was still working when I rolled it and sold it.

[Jojogreen]

After installing my aftermarket stereo, periodically, the rpm gauge stopped working when I would turn the car on. I figured out all I had to do was turn the car off, then when i started it back up, it the gauge started to work again.