"phil" wrote in message
> Battery appears good, posts are clean and tight..IDEAS ?
Remco has good ideas, and if that doesn't get it...
The battery could still be defective in a couple ways. Besides the old
fashioned way of just getting weak, batteries since the late 70s have
increasingly shown a failure mode that I assume is broken internal
connections. It shows up as an apparently dead or very weak battery that
miraculously recovers. Whacking the battery posts with a hammer usually
makes it work again, but the battery is still defective and needs to be
replaced.
The alternator might be bad. The only way to check this (without special
equipment) is to measure the charging voltage - the voltage across the
battery when the engine is running. It should be somewhere between about 13
and 15 volts DC, toward the low end of the range in hot weather and toward
the high end in cold weather. Also, with a digital voltmeter, the AC voltage
across the battery should be under 0.1 VAC (a tenth of a volt.) If the AC
voltage is above 0.5 VAC (1/2 volt) the diodes in the alternator are bad.
Rarely, the ground connection to the block may be bad. Usually that
condition shows up as a bunch of weird electrical problems, but in a few
cars the battery ground is to the chassis instead of the block. A separate
wire then grounds the block to the chassis.
Anyway, if you don't have a digital voltmeter, this is a good time to buy
one or find a friend who will loan you one. Analog voltmeters will get you
as far as checking the voltages Remco describes, but verifying the
alternator really takes a digital voltmeter. Most inexpensive analog meters
will not let you measure AC when DC is present. (The ones that do have a
separate jack usually labeled "output" for that purpose.)
Mike
>> Stay informed about: 92 Accord LX 5spd Intermittent start..replaced starter and..