Check Guages Light

[Toughspot]

Good morning guys,

 

Recently my "check guages" light has been coming on and the dash DC Volt meter would spike all the way over to the high side.  When I stop the vehicle to check the voltage with my VOM the error goes away.

 

What do you guys think this probably might be?

[Mopar1973Man]

Check the green wire. If the green field wire is shorted to ground the alternator will runaway wildly. 

[Toughspot]

Which green wire would this be?  Where would I find this?  Under the hood?

[Mopar1973Man]

There are only the green and blue wires on the back of the alternator. 

 

Green is a variable ground for the alternator field. 

Blue is +12V when the key is turned on. 

 

[Toughspot]

Thanks.  Will check when I get home.