Question about 1996 Ford Windstar
If the alternator isn't putting out as it should be the first thing
that needs to be checked is the battery because it really has an
influence as to how the alternator charges. Since you have a new/good
battery...hopefully the cables where they attach to the battery are
corrosion free...and the alternator has been replaced several times and
tested the problem shouldn't be with those 2 components.
The next place to look is the AIR pump belt because it drives the alternator belt. It has a tendency to loosen up and when it does the alternator doesn't turn as fast because of the belt slipping on the AIR pump pulley. To verify this with the engine off place your thumb on the fan blade of the alternator and try to push/turn it. It shouldn't move at all and if it moves easily then you have probably found your problem. There is 1 bolt in behind the AIR pump that you will need to access from below and loosen otherwise the pump will not move when you turn the tensioning bolt as well as 2 in front.
There is another possibility and that is that the idle speed is too slow to allow the alternator to charge properly with everything on. If you raise the idle speed up by pressing your foot on the accelerator and your voltage returns to the 14 volt range then try checking the adjustment of the minimum air/idle screw, throttle position sensor/TPS and the air gap for the idle speed control/ISC motor and maybe you can get the charging voltage to a normal range that way.
Posted on Jun 23, 2008
a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Sep 29, 2012 | 2000 Dodge Grand Caravan
Feb 03, 2011 | 2002 Chevrolet Blazer
Dec 31, 2010 | 2001 Ford Taurus
May 22, 2010 | 2004 Ford Mustang
May 20, 2010 | 2006 Jeep Commander
Sep 10, 2009 | 2004 Honda CR-V
Jul 06, 2009 | 2007 BMW 525xi Sedan
Jan 13, 2009 | 2004 Hummer H2
Dec 07, 2008 | 1999 Land Rover Discovery
125 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: