Battery Light

[funkadelic1022]

When I accelerate my battery light sometimes comes on. Is this a bad battery or a bad alternator? 99 Taurus here. I changed the battery in May '04 when it refused to start. Cleared up the problem then. Light has been showing up on and off for months now.

[denisb]

If it's RPM related, I'm tempted to say alternator. Although you would think it would charge better at high RPMs if it was starting to go south.

That is weird.

Denis

[funkadelic1022]

I spend a lot of time driving in the country between work and family. A lot of that time I am driving at speeds around 60 mph. When I speed up to pass someone or when I come across a long flat stretch and hit the gas the light will show up. It doesn't stay on for long though and it goes off as soon as I let off the gas. The light almost blinks when I do that.

[0365gt]

I have a '97 SHO and was having the same problem with the battery light coming on when I hit high RPM's. It always went off when the car shifted gears, until a couple weeks ago. I accelerated sort of hard and the battery light came on, and stayed on. When I was on my way to the shop to get it checked out, the car died. Turned out to be the alternator. Had it replaced and that fixed the problem. So I would have that checked out before you end up on the side of the road like I did.

By the way, if you do have to replace the alternator, find somebody other than Ford to do it, they'll charge you an arm and a leg.