Low voltage problem

[adam05ford]

So lately I have been driving the bronco to work in the morning and it is still dark outside. When I am driving down the road with the lights on I notice all of my dash lights as well as my head lights randomly getting bright then dim. There is not real pattern to it so I don't know if it is when I hit a bump or what, it just is dim for a few seconds then bright for a few. My amp gauge has never really worked so that doesn't help me diagnose my problem. I am still running the stock alternator. Does this sound like an alternator problem or maybe a regulator or something? I haven't really had any dead battery problems but I'm not sure how quick it would drain it.

Thanks,
Adam

 

[Heus33]

First thing I'd do would be to clean all your grounds - alt, battery cable, battery terminals, etc. Start with good clean grounds, reassess the situation, then go from there.

 

[oleguy74]

x2 and when that is done,check voltage with engine off.then start ande check.engine off a good batt should read 12-12.5 volts.running should read 13.5-14 volts.

 

[jax34]

My headlights went off the other night as well my dash lights, my problem was the connector to my hi/dimmer switch in the floor, might want to look at that as well

 

[Steve83]

Start with all the heavy cable connections: