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Old 02-11-2008, 08:58 AM   #8
danomano
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Join Date: Dec 2007
Location: Austin,Texas
Posts: 146
Re: Need a 87 suburban wiring diagram

Maybe figured this one out it seems the alternator turn on comes from the computer. If the computer is not working then that is why only battery voltage. When I bought the turn I remember checking for codes and it would only give me "12" some maybe to computer died.
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