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this is an alternator issue... right? #981391 01/18/10 02:41 AM
Joined: Apr 2000
Posts: 4,282
ldivinag Offline OP
Roll Me Over
ok... car is my 90 4runner.

doesnt get driven that much anymore.

battery is a new 6 month old red top optima.

lately, i charge the battery on a 12 amp charger to get it ready to run.

but recent issue is that after a drive with stereo system going, like last nite, i cant even start the thing after getting gas.

only a jump start would get me going.

1. i know the recent reputation of optimas arent like they used to.

2. no wacky lights from dash saying bad charging. all lights do normal startup flashing.

3. using a simple cheapie device connected to cig lighter says charging is 13.5v and above during driving.

what am i missing?

leo d.

90 4runner, v6, auto, WCOR CitB kit,
marlin duals, arb rear, tt front
4.88, blah, blah, blah...

Pres. of TEAM IFS! and
GETTING OFF 4WD Club member
From the Off-Road World
Re: this is an alternator issue... right? [Re: ldivinag] #981392 01/18/10 03:37 AM
Joined: Aug 2003
Posts: 480
MAC Offline
Is the batt showing 12.7v after the charge?

Re: this is an alternator issue... right? [Re: ldivinag] #981393 01/18/10 03:40 AM
Joined: Aug 2003
Posts: 480
MAC Offline
You specifically mentioned the stereo. New? Did you try the same scenario of driving without the stereo on?
Is the stereo a 500 Kilowatt smile

Re: this is an alternator issue... right? [Re: ldivinag] #981394 01/18/10 04:14 AM
Joined: May 2006
Posts: 457
Davepet Offline
What is the voltage at the battery terminals while running? Both with & without the stereo?

Bad connections can cause this problem, so check where it matters.


Re: this is an alternator issue... right? [Re: ldivinag] #981395 01/18/10 06:43 AM
Joined: Nov 1999
Posts: 1,049
toyrunner Offline
Body Damage is Cool
Take a multi meter and check the battery cold. It should be over 12.0v
If it is lower, the battery is an issue.
As mentioned, check all connections.
After that, run the rig a bit and see what the actual battery voltage is. Running, it should be at least 13.7. Right after shutting it down it should read about the same. You can have a shop do an amp draw/load test on it also. That will tell ya what shape it in.

1985 SR5 4Runner
eLocked with Carter Lock
4.7:1 single case
Davez Offroad twin stick

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