How do you replace the (105 amp) alternator in a 2003 Aztek 3.4L? I determined that it's the alternator as I have a new battery that delivers 12.5 VDC with the engine off. The alternator produces 14.8 volts while the engine is running and will intermittently kick out so I am back to the 12.5 VDC from the battery. I believe it to be the regulator. Anyway, it looks pretty straight forward but I thought I'd post this while waiting for my fingers to thaw out (wife has garage all piled with crap for an upcoming move...).
No big deal to change it,you should have it done in 2 hours.
SOURCE: Alternator or Voltage regulator
if you can carefully put a metal wrench on the rotating pulley of the alternator and felt a magnetism attracting the metal wrench, then your alternator is charging. if there is no magnetism, then the alternator is not charging...
another test is to measure the voltage on the small wires that went in to the alternator that says "F" for field, it should measure battery voltage...that is the voltage from the regulator..that means your regulator is working...but the altrntor is not..
without that battery voltage, then the regulator is he culprit...
pls be carefull...
hope i was able to solve ur problem..
pls rate me.. tnx, drcool..
SOURCE: TCS ABS lights on & alternator not fully charging
Alt shoud be putting out 14 to 15.2 volts.
SOURCE: 2006 Chevy Silverado alternator intermittent charging
Perfectly normal.
Starting with the 2005 model year, light duty full size pickups and
utilities are equipped with a new Regulated Voltage Control (RVC)
system. This system reduces the targeted output of the generator to
12.6-13.1 volts when in "Fuel Economy Mode" to improve fuel economy.
The generator may exit "Fuel Economy Mode" if additional voltage is
required. This will cause the voltmeter to fluctuate between 12 and 14
volts as opposed to non-regulated systems that usually maintain a more
consistent reading of 14 volts. This fluctuation with the RVC system is
normal system operation and NO repairs should be attempted.
SOURCE: 2001 CHEVY SILVERADO 2500HD BATTERY LIGHT FLASHES
2001 chevy silverado 2500hd battery light flashes intermittently. no problem with battery or alterntor. both tested ok. no problems with starting or running. voltage gauge reads just above 14. no problems with anything except battery light flashes. what could be the problem?
SOURCE: 1985 Ford Bronco.....alternator will not charge
MY NA ME IS MAGICBROOM58, HAVE YOU TRIED .. I THINK IT'S ON THE FIRE WALL PASS. SIDE (CILINOID) TAKE THE RBBER OFF THE POS. AND TURN YOUR EGNITION OVER TO THE ON POS. GO BACK UNDER YOUR HOOD AND TAKE A RUBBER HANDLED WRECH?SCREW DRIVER AND CONNECT THE 2 POINTS IF IT TURNS OVER U FOUND YOUR PRBLEM
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