Question about 2007 Hyundai Santa Fe Limited
Ford expedition 4wde not engaging. fixed a broken plastic coupler in vacuum line going to vacuum reservoir behind battery box and also had to replace 4wd vacuum engagement solenoid on firewall next to battery box.
Posted on Feb 13, 2014
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Posted on Jan 02, 2017
I don't know if your car has an integrated regulator or not; some house the regulator in a section of the alternator case, others mount it remote from it.
The regulator monitors the load and battery voltag,e primitively but effectively, and controls the current flowing through the field winding of the alternator to ground, changing the magnetic field intensity and consequently the voltage output of the alternator.
The 'hot' end of the field is internally connected to the + output, the 'cold' end is controlled by a transistor inside the regulator which, in turn, is controlled by circuitry monitoring the system voltage.
Some alternators can be tested by sticking a wire through a specified opening, actually shorting the controlled end of the field to ground briefly, while monitoring the voltage across the battery, doing this though for seconds only.
This essentially bypasses a suspected defective regulator; this causes the output voltage to rise instantly to its maximum of ~17 volts if the alternator is OK.
I don't recommend poking a wire at random into an available opening so having a service manual (Haynes-Chilton) would be nearly mandatory.
Posted on Oct 03, 2008
I am having the same issue I have replaced the alternator and then the battery terminals and now the battery and it still only holds a charge for about 5 hrs and the car will run but the battery starts to die and the engine starts to sputter after bout 25 minutes of constantly driving tho any ideas
Posted on May 27, 2013
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