I replaced my alternator and now i think i might have a short somewhere or something because it wont maintain a charge now i have tested the alternator and it is good battery is good gone over all the wires and they appear to be good the only other things i have done is change the battery terminal connectors and spark plugs and fusible link for alternator and alternator relay i cant for the life of me figure this out is there anyone that can help me

SOURCE: 1984 ford f 150 not charging

Ok lets see
The charge ligth or sistem is operating properly ligth, or not
1) check for pwer, in the Alternator positive terminal, shoul be power all time ingnition Off or On dont matter
2) Check for ingnition controled power in the another wires that going to the other connector in the alternator, beside the + batery

If do you find power in both test you should take the alternator to the autoparts store to be cheked, but if any of those test fail, check you wiring harness, the

SOURCE: 1988 chevy suburban charging system

First check alt At The Back of Alt Big Red Wire Were hooks to Post (stud) Do you have voltage ?? How Much??
What Voltage do you have at same Place with Engine Running ??
Now At wires Were they plug into Alt ,Top. Wires in White Plastic Clip, Do You Have Powe With Key On ?? How Much Voltage??
Jump across the 2 in the clip (with Engine Running)ONLY TEMPORARY!! Do You Have Voltage at Battery ?? How Much??
If Over 13volts With Clip On (Jumped) You Need A Internal Voltage Regulator ..
Is Batt Light On on Dash ??? Theres A Lot Of Testing You Can Do !!! And I will Need More Infomation to Keep Going ... These are just some Possible Problems No Way In Depth ...
Could Be a Number of things Or May be Just as Simple As a Blown Fuse, Dirty Batt Cables ETC etc etc I Hope It Puts You On The Right track !!!!!!!!!!

SOURCE: 86 Tercel 2wd wagon won't charge it's battery

clean battery terminals ,bring battery to be tested after charging, after reinstalling battery run car and test alternator output it should be a minimum of 13-14volts if it is under 13 replace alternator , use a voltmeter set on 12 volt 10 amp dc to check the wire to check is located on the back of the alternator covered with a rubber grommet of course hold negative wirw on volt meter to ground and touch red wire to big terminal on back of alternator while car is running should have 14 volts or at least 13 volts

SOURCE: replaced alternator and battery is good but not charging

I found the problem YEAH. It was the fuse that is in the side of the fuse box under the hood, Its where the battery wire from the alternator connects thru a fuse to go to the battery, Its one hundred and something volt fuse. It took care of the problem instantly.... Thank you all for your replies...

Ronny Bennett Sr.

• 6988 Answers
• Posted on Nov 14, 2009

SOURCE: will not charge

What year is this mark vll?On the back of the alternator look for 12 volts on the large connector out put,with the engine off.If there is not 12 volts at that connector,run a new wire,as big ,or larger than the one on it,and go to the positive side of the battery,this will fix it.If there is 12 volts there,check it with the engine running,and see if 13.65 to 14.25 volts is thereat the large connector on the back of the alternator.Check the voltage regulator,see if there is 12 volts on one wire,with key off,and 12 volts on another one,only with key on,if there is,then replace the voltage regulator,it is a defect.