Battery voltage issues.

[sleepy2lazy]

Hey guys, lately I have been having electrical issues with my car.
1995 GSX, apex'i turbo timer, boost gauge, blinky A/F gauge.

Today, all day basically, my turbo timer has been reading my battery voltage at 13.0 and dropping to around 12.5. When I return to my car and start it up again, my battery volts is around 12.0, and my brake light / battery light is still on. (The hand brake was down after i turned on my car.) After driving for awhile, it goes away. But when I get from spot A to B, and start my car up again, those lights are on again.

Anyone have any ideas what I can do to fix this.

[Shane55113]

well it seems to be within operating perameters, i dont understand what the problem is.

[blageo23]

Same thing happend to me. My I got a new alternator and it stoped. But sometime my Lights come on and I have not clue why. Your car is happy when you battery voltage is 13.8-14.8. Could be your battery also tho.

[tim]

How old is the battery? Go buy a hydrometer from the parts store for 1.99 and check each cell in the battery. Look for variance among cells.

Could really be the alt, battery or a poor connection. I would definitely check all connections at the battery and alt for corrosion and make sure they are tight.

The heat during the summer is hell on a battery and if it is older it could just be time for a new batt. You need to do a little more testing to narrow it down.

When running you should be reading atleast 14volts and when shut off a full batt will be 12.6 volts but can be higher since is was just being charged by the alt.

[sleepy2lazy]

Hmm..I had the battery replaced last year, one of my dads friends "fixed" my alternator. Last year, the battery voltage was doing the same thing too and my car died. I left the state returning to find my car working ok again.... I just hope its not gonna do the same thing this summer again, as the situation is pretty similar.

Thanks for the input guys.

[Kracka]

Sounds to me like your voltage regulator on the alternator; I would replace your alternator soon since its going out before it wrecks your battery too. Your voltage is too low, it should be in the ~13.5-14.0 range while the engine is running and no electrical things turned on.

[Tauni]

Two things that had my car doing this dumb crap: bad alternator and then bad fuse. Actually I had a wire in there so that was my problem, but sounds like what happened to mine for awhile so there's the best input I can give.