I have a 1992 F-150 with a 5.0 302 in it. Last week she started going haywire. My battery wasn't holding a charge, my spedometer was bouncing up and down and my mileage read was coming in and out. I had the diagnostics test done from Auto-Zone that tested your battery, alternator, and starter. They said that my alternator had low power output but everything else was fine. My dad (he's a mechanic) said I had to replace my voltage connectors on my alternator. We did that and she acted fine for about a week. Battery was holding a charge, no problems at all. A couple days ago, my battery light popped on and the battery is not holding a charge AT ALL. I constantly have to charge it. Any ideas on what the new issue could be?
change the alternator and make sure the belt is good and tight ! your voltage regulator is inside the alternator and it,s acting up !
Batteries do not hold a charge forever. If there is a power drain somewhere in the vehicle, like when you start the engine or run the headlights or the radio, you have to recharge the battery to keep it topped off. Your alternator should be doing this automatically as you drive. I have no idea what you're talking about Voltage Connectors in your alternator, but if your alternator is not keeping up with the demand of the electrical equipment that is installed in your vehicle, it will continue to draw down the charge in your battery until it goes dead. Have your alternator tested under load, and if it shows low voltage again, it's time to replace your alternator.
