The Ford Barn

Texas Tom · 04-23-2015, 05:16 PM

My ampmeter was working just fine, and now it refuses to 'excite' to positive when I start the engine and rev it up. The needle stays slightly negative no matter what I do.

I assumed the ampmeter went bad on me, so I installed another new one. No change. So I installed yet-another new one. No change.

My car has a 12-volt system. As far as I know there's nothing wrong with the alternator. Also, the electrical connection to the alternator is tight, as are the connections to the back of the ampmeter.

It certainly seems that the ampmeter itself is OK and that its faulty performance is being caused by something in the electrical system.

I have no clue what to do next. I welcome any advice you may have to offer.

Thanks.

04-23-2015, 05:16 PM	#1
Texas Tom Senior Member Join Date: May 2010 Location: Texas Posts: 137	Ampmeter will not 'excite' My ampmeter was working just fine, and now it refuses to 'excite' to positive when I start the engine and rev it up. The needle stays slightly negative no matter what I do. I assumed the ampmeter went bad on me, so I installed another new one. No change. So I installed yet-another new one. No change. My car has a 12-volt system. As far as I know there's nothing wrong with the alternator. Also, the electrical connection to the alternator is tight, as are the connections to the back of the ampmeter. It certainly seems that the ampmeter itself is OK and that its faulty performance is being caused by something in the electrical system. I have no clue what to do next. I welcome any advice you may have to offer. Thanks.