3 Warning lights

[Rahnter]

So driving my car to work I had three warning lights come on: brake, battery and rear bulb lights.

I noticed some mild whining noises (best description I can think of) earlier this week. It would only do it at idle. I'm assuming it's the alternator, though I've yet to do any testing; One thing I did notice was that my windshield wipers were sluggish.

1990 Supra, 7M-GTE

Any suggestions are appreciated. Thanks.

 

[jdub]

Alternator

Sounds like you're draining the battery.

 

[SupraMario]

Alternator

Sounds like you're draining the battery.

Yep, or you could have a bad connection to the alternator.

 

[supradjza80]

easiest way to verify its the alternator is to check voltage at the battery when the car is running. It should be ~14 v. Turn on the headlamps/blower to full speed/ and defrost on to make sure the alternator can still keep up.