Battery and Brake Light? 15v running, 12v car off

Reply Subscribe

Thread Tools

Search this Thread

Apr 17, 2010 | 02:29 PM

Paul Walkin

Thread Starter

Evolving Member

iTrader: (6)

Joined: Apr 2010

Posts: 267

Likes: 1

From: NJ

Battery and Brake Light? 15v running, 12v car off

Both my battery and brake light are on on my dash. My battery reads 12.2-12.5 volts with car off. Sometimes as low as 10.5 cranking, 15.1-15.2 when running.

Any ideas?

Apr 17, 2010 | 02:32 PM

Kracka

Evolved Member

iTrader: (49)

Joined: Apr 2007

Posts: 8,970

Likes: 17

From: Prosper, TX

That's a little high while running. The voltage regulator in the alternator might be going bad.

Apr 17, 2010 | 02:34 PM

Paul Walkin

Thread Starter

Evolving Member

iTrader: (6)

Joined: Apr 2010

Posts: 267

Likes: 1

From: NJ

Also its a PC680 battery if that changes anything

Apr 17, 2010 | 04:03 PM

Kracka

Evolved Member

iTrader: (49)

Joined: Apr 2007

Posts: 8,970

Likes: 17

From: Prosper, TX

Quote:

Originally Posted by DRCperformance

Also its a PC680 battery if that changes anything

Not really except the mini-batteries do put more strain on the alternator and voltage regulator and in theory cause them to wear out sooner.

Apr 17, 2010 | 04:13 PM

Skylineracer

Evolved Member

iTrader: (21)

Joined: Jan 2006

Posts: 1,453

Likes: 0

From: Clifton New Jersey Lived: Daytona Beach, Florida Lived: Port Orange, Florida

Quote:

Originally Posted by Kracka

Not really except the mini-batteries do put more strain on the alternator and voltage regulator and in theory cause them to wear out sooner.

a lil off topic but why?

May 18, 2010 | 09:29 AM

Paul Walkin

Thread Starter

Evolving Member

iTrader: (6)

Joined: Apr 2010

Posts: 267

Likes: 1

From: NJ

I'd also like to know why?

I had the alternator rebuilt.. the Rectifier and Regular were shot, but the shop didn't think the smaller battery did it.

Reply Subscribe