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Charging is not charging right. I have had the alt. rebuilt twice and a new alt put on. Two weeks ago I put a new heavy duty battery on it. Every time I have it worked on it will put out 14 or more volts for about two weeks then it starts dropping to as low as 11.8 volts. When it drops below 12.3 the shifting indicator lights will flash and the temp gauge stops working and the anti theft system problem will show. After I turn it off and let it set for a few minutes and restart the volts will return back to 13.5 or better. Turning on the headlights on seems to have a major affect. Please help!!
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Take it to Auto Zone or O`riellys and they will test it for you at no charge.They can check your charging and starting system also.Hope this helps.Good luck.
That's fine this happens i have gotten from 30 minutes to a week out of rebuilt alternators up to 10 years 2 months ago you should have warranty on it contact supplier.
You are on the right track with a heavy duty battery. You have a diesel engine. It has a high compression. If you replace your starter with a heavy duty one, that should clear up your problem.
you have a dirty earth some were maybe on the engine to body or battery to body look for all the earth straps and take them off to scrub them clean with a wire brush then smear them with petroleum jelly do both battery leads as well every earth must be very clean it wont hert to smear some petroleum jelly in the alternator plug it keeps the road dirt out of it and it all helps at the end of the day,,,
i guess you are saying your alt. is not charging....did you check all fuses....and if a rebuilt alt from advance or auto zone they have bad rep for alt and starters
the alt variation is normal. When under load or not under load, the amps will fluctuate. If anything else, the voltage regulator is faulty. Or, there is a faulty relay somwhere
Yes that little thing on the alt is the regulator. It tells the alt when to charge and when not to and yes its pcm controlled. You can bypass the pcm but I would not reccomend it. I would say alt is probably bad...Cause that pcm wire dosnt usually cause any issues. Youu can have the alt tested at autozone. They can test it in the car or out although out of the car is a much more thurough test. I would again say al is bad....rebuilt stuff is usually rebuilt with good parts from old units meaning most all the parts are used...
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