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Old 02-14-2010, 01:52 PM
consultIII consultIII is offline
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Re: Silverado Alternator not putting out proper volts - Already changed the alternato

check for voltage drops across alternator grd and insulated circuits.

With vehicle running turn on all electriacal loads; put voltmeter put red lead on alternator output terminal and black lead on positive battery post.

test ground circuit by putting red lead on alt case and black lead on battery neg post.

should read not more than .1 volts per connection or more than 0.3v total. If detect voltage drop higher than this you have bad connection or high resistance in the circuit.
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