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Re: Battery Posted by Ari [Email]  (#2847) [Profile/Gallery]
(more from Ari) on Tue, 10 Jan 2006 10:07:21
In Reply to: Battery, Kevin, Tue, 10 Jan 2006 08:13:45 Members do not see ads below this line. - Help Keep This Site Online - Signup |
When the engine is running, the alternator should be supplying all of the electrical power required by the car, and re-charging the battery. When driving along, (1) the Battery light should be out, and (2) the voltage should be 13.0 volts or more. The voltage may drop a little below 13.0 (high 12's ) with an electrical load at idle. But with engine rpm much up over idle, it should be at least 13.0
If you aren't seeing those voltage when driving along, suspect the alternator. More specifically, the voltage regualtor, which is mounted on the back of the alternator. Alternators do die, but rarely as compared to the VR.
One important thing to check - does the BAT light work? Turn the key to ON but don't start the car. The BAT light should come on. If it doesn't then it needs to be fixed. The BAT light circuit is necessary to get the alternator to work. The bulb may be burned out (unlikely but possible), most likely the wire from the bulb to the alternator - a thin yellow or green wire - may have rotted through in the engine compartment.
Questions-
Does the BAT light work?
When the engine is running, what is the voltage on the EDU? If you have a voltmeter, what is the voltage on the battery posts? Does it increase when the engine is rev'ed?
It never hurts to remove the battery clamps, and polish up the inside of the clamps and outside of the posts.
posted by 192.249....
, Tue, 10 Jan 2006 10:07:21 <-- Viewing This Message
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