angelini197

Hi everyone! I have had my car in the shop twice this week for the same problem. My battery gauge moves up and down and my lights (interior/dash/headlights) flicker with the moving of the gauge. I replaced my alternator less than a year ago and when I took it to Ford they told me my battery had a short in it. After replacing my battery its still doing the same thing and when I took it back in they told me it was not doing it while they had it, but I have had it back for two days and it continues to do it. Any thoughts on what it could be?
Thanks so much!

Nuke

Check the condition and tightness of the battery cables and clean the connector to the alternator. If that doesn't help, then I suspect that it's the alternator (again). A battery by itself won't cause erratic voltages.

The alternators in these cars are known, weak components. If possible, find someone that sells good rebuilt units. They're not very hard to install.

JCON

Do these highs and lows come with bass notes? do you have subs or a sound system other than stock?

Lethaldosage423

Start your car.

disconnect the negative battery cable

does she still run?

thats the easiest way to check your alternator without using a volt meter.

Torch_Vert

This was a tried and true method back before cars were stuffed with sensitive electronics and gas cost 39 cents a gallon. These days, it's not really wise and can cause voltage surges that can damage components in the car including an otherwise functional alternator.

vallejosh

My 2006 mustang battery gauge go up and down when I stop at the light I replace the altenator and battery and the problem still there. Does anyone know what it could be?

Torch_Vert

Are there any other symptoms besides the gauge needle bouncing around?

vallejosh

Thats it when I turn it on in the morning it turn up fine but when I turn the lights on 5 to 10 m later the neadle drops and go up when I step on the gas