Volt Meter Electrical Problems

[piperpilot123]

I have an electrical problem that is driving me nuts. When I start the engine there is a faint clicking sound and the volt meter needle continues the fluctuate between yellow and green and does not stop until I shut it down. Any one
have any idea what it could be, maybe the glow plug relay ???
Thanks for the help
1987 2 man M998
1999 H1 Hummer soft top
2003 H1 Hummer soft top

 

[Retiredwarhorses]

That's a normal function called after glow....only problem is it's only supposed to do that for about 1-2mins and then stop.
this is controlled by your EESS...I'm assuming the timer function that controls after glow has gone haywire.
most likely need a new EESS.

 

[Action]

+1. are you just shutting it off when it doesn't stop? Or how long have you let it run and it keeps moving? The headlights will dim and get bright also.

 

[Bulldogger]

Agreed, normal. Don't feel bad for asking though, I didn't know about it until I asked!

That said, it should only last a minute or so and stop. If yours is going much longer, then yes, something wrong.

Bulldogger

 

[desmodromic]

Thanks for passing along the knowledge in the replies. One of my HMMWVs does this regardless of what EESS box is installed, but stops after 2-3 minutes. Good to know the one acting "weird" is a actually the normal one. One gremlin down, 99 more to go.