start your truck ,use a volt meter to see what the charge is (should be
14.8) if not... you probably pinched a wire that runs down along the
transmission or blew a fuse. Another way to test to see if the alternator is
coming on is get a 2 wire plug from the wreckers like yours splice the 2
together and run 12 volts to it.. see if it charges then. Others may have
easier methods ... I'm just trying to help with what has worked for me..I am
no means a mechanic..
For a altenator to produce output it has to have field voltage applied
to it. Without it there will be zero output. It is removed when you
shut truck off to prevent battery drain because the field current draw
would kill battery in less than 24 hrs. Check for 12 volt fiel power
being applied when you turn ignition on to run position. It will be in
the small connector that plugs into it.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.