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Re: Checking alternator in truck?
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Posted by Bob M on May 11, 2004 at 19:06:19 from (66.67.11.95):
In Reply to: Checking alternator in truck? posted by BlueLite on May 11, 2004 at 18:46:28:
First off if you have an alternator don't, don't, **DON'T** remove the battery with the engine running!! Even if your truck doesn't have electrical problems now, guarantee it will after you attempt this! Regarding your charging problems, as you note the idiot light is next to worthless. About all it tells you is the alternator is spinning (ie. the belt's not broke), and the alternator is developing a voltage very slightly above battery voltage. What you need is an accurate voltmeter placed across the battery. If the alternator is good the voltmeter will show 14.0 - 14.5 volts or so with the engine running. Anything less means the alternators has problems. Don't have a voltmeter? Easiest solution is to remove the alternator and take it to Advance Auto, NAPA, etc. They'll test it for you for free. Hope this helps...
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