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-   4.7L PowerTech V8 Specific Topics (http://www.ramforumz.com/forumdisplay.php?f=205)
-   -   testing the alternator (http://www.ramforumz.com/showthread.php?t=134490)

mikosiko 02-23-2013 09:41 PM

testing the alternator
 
Where do you put the leads, where do you set your multimeter on and what reading should I get... I have good voltage on battery while driving, good voltage right after stopping, 14 volts while running at idle and 12 without engine running, but let it set for a bit and I have a draw somewhere and I just wanted to start with testing the alternator... Thanks

GTyankee 02-23-2013 10:34 PM

On older vehicles, i just start it up, then disconnect the negative battery cable, if it keeps running, i try the headlights for a little bit, if still runs the problem is not the alternator

http://www.youtube.com/watch?v=ZuumBVz6WOM

checking for parasitic draw

http://www.youtube.com/watch?v=KF1gijj03_0

mikosiko 02-24-2013 09:08 AM

Ok did the check the charging and it charges fine, now I am on to checking for parasitic draw... If there are any tips out there while I do it send them on in, Ill check back here in a bit...Thanks


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