battery light on and off in the pkwy!!??

fongo · 08-02-2005, 05:16 PM

Hi everyone.
I'm sure the heat wave is affecting everyone some way or another.
Today, on the parkway I suddenly got the red battery light while I was crusing down the highway. It started going on and then off. In addition, the voltmeter in the instrument gauges shot up al the way. I made sure the brake light was off. So far everything under the hood looks normal and the car runs good w/ no overheating. Any ideas as to what's happening? Thanks.
fongo

Ieatcamaros · 08-02-2005, 05:30 PM

I'd put a voltmeter on the battery and see for sure if your alternator is charging.

mpj76 · 08-03-2005, 08:52 AM

Usually the light turns on when the alternator isn't charging, however, the fact that the volt meter shot way up could be an indication that your voltage regulator is going out. On many systems its located on the back of the alternator. I used to have an external regulator that went out on me. When that happened it blew out the bulb on my cop light.

racerboy88 · 08-07-2005, 11:18 AM

that was the first sign that my alternator was going. If you need to replace it get a 130 amp model from powermaster. Bigger than stock and reasonably priced. That is my next project this summer when I have time.

08-02-2005, 05:16 PM	#1
fongo Registered Member Join Date: Jan 1999 Location: Farmingdale, NY Posts: 139	battery light on and off in the pkwy!!?? Hi everyone. I'm sure the heat wave is affecting everyone some way or another. Today, on the parkway I suddenly got the red battery light while I was crusing down the highway. It started going on and then off. In addition, the voltmeter in the instrument gauges shot up al the way. I made sure the brake light was off. So far everything under the hood looks normal and the car runs good w/ no overheating. Any ideas as to what's happening? Thanks. fongo __________________ 1993 GT, MAC Fenderwell Cold Air Induction; Accel dist.,Splitfire plugs, BBK: 1 5/8 unequal length shorties, hi flow H-pipe w/ cats; Flowmasters 2 chamber American Thunder catback system, Motorsports 3-core radiator, 180º thermostat, BBK adj. clutch quad...the rest is bone stock!..but more mods to come!!

08-02-2005, 05:30 PM	#2
Ieatcamaros Domestic Rice really sucks! Join Date: Apr 2002 Location: KY Posts: 973	Re: battery light on and off in the pkwy!!?? I'd put a voltmeter on the battery and see for sure if your alternator is charging. __________________ The sig says it all.

08-03-2005, 08:52 AM	#3
mpj76 Registered Member Join Date: Sep 2002 Posts: 158	Re: battery light on and off in the pkwy!!?? Usually the light turns on when the alternator isn't charging, however, the fact that the volt meter shot way up could be an indication that your voltage regulator is going out. On many systems its located on the back of the alternator. I used to have an external regulator that went out on me. When that happened it blew out the bulb on my cop light. __________________ 91 Coupe: FMS 1 5/8 unqual shorty's, BBK off road X-pipe, Super Duty T5, Pro 5.0 short shifter, 2.73 rear, G3 alt, MSD coil, dist, no smog pump, oil cooler, 195K miles, 14 deg timing, 23 mpg city/29 mpg highway @ 65 mph.

08-07-2005, 11:18 AM	#4
racerboy88 Registered Member Join Date: Sep 2003 Location: British Columbia Posts: 123	Re: battery light on and off in the pkwy!!?? that was the first sign that my alternator was going. If you need to replace it get a 130 amp model from powermaster. Bigger than stock and reasonably priced. That is my next project this summer when I have time. __________________ 1990 5.0 LX H/B H-pipe w/ flowmasters, Koni shocks and BBK springs.