Why would the battery light on a 1996 Ford Taurus flash at about 3500 RPMs and stay on above that?

The Voltage regulator in your alternator is bad, you need a new alternator. The alternator in a 1996 Ford Taurus contains a VR built into the alternator and usually can not be replaced without overhauling the alternator.

Answer

This is fairly Common It is a problem with the Alternator but the alternator may not be bad. The battery light is just signaling that the cars power(12v) is unusually low. Try adjusting the belt it is probably slipping at the higher rpm's. It may seem tight and not slip at low rpms. Best and cheapest option replace the belt. If that doesnt work have the alternator looked at it may not turn freely enough to operate properly at higher rpms. Finally replace alternator.

Answer

Try having the alternator tested, I've seen alternators that would work at low rpm, and cut out at higher rpm's.

Answer

I was having problem with a speed sensor on my 96 Taurus. The enguine was reving to high because tranny wasn't shifting to second gear. At times my alternator light would flash. The belt was loose. The belt finally became wound out and came off the pulleys. I'm here to find out how to adjust the 'belt tensioner'.

Answer

I had the same problem with my 1994 Taurus. I have a little bit of experience working on cars, kind of a backyard mechanic. Anyway, I removed my alternator and disassembled it and found the rectifier had shorted out. It's really simple to replace and the part is available at most auto part stores and is not expensive at all. In fact, I performed this back in June 2000 and still going today( April 2005). Try this repair or just remove your alternator and take to any Auto Zone for diagnostics and just swap for a rebuilt/new one. Good luck.

First answer by ID0000000000. Last edit by Mediarocker543. Contributor trust: 58 [recommend contributor]. Question popularity: 98 [recommend question]