Ask Experts Questions for FREE Help !
Ask
    diabolicalaj's Avatar
    diabolicalaj Posts: 4, Reputation: 1
    New Member
    		  
    #1

    Jul 24, 2011, 10:46 PM
    Battery light keeps coming on
    OK so we have a new battery a brand new altenator but yet when we drive around the battery light comes but nothing will be plugged in the cig lighter n then awhile later the ABS light then the airbags light... so if anyone knows what the problem could be let me know... I am getting tired of this problem.
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
    Uber Member
    		  
    #2

    Jul 25, 2011, 06:18 AM

    You likely installed a remanufactured alternator with a defective voltage regulator and/or worn brushes--exchange it for another. Regulated voltage should be 14 to 15 volts--easy enough to check.
    diabolicalaj's Avatar
    diabolicalaj Posts: 4, Reputation: 1
    New Member
    		  
    #3

    Jul 25, 2011, 06:53 PM
    This has been the 3rd one we been through n all voltage regulators have gone bad...
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
    Uber Member
    		  
    #4

    Jul 25, 2011, 07:24 PM

    Remove and fully charge the battery. Even new batteries should be charged, prior to installation. Alternators are battery maintainers, not chargers. You may be burning the alternators out, since the battery is so discharged.
    diabolicalaj's Avatar
    diabolicalaj Posts: 4, Reputation: 1
    New Member
    		  
    #5

    Jul 25, 2011, 11:26 PM
    Yea I've done that every time I change the alternator as well bt few people have also suggest that it culd be the power cable from the voltage regulator to the battery has fried, culd that be it as well??
    CaptainRich's Avatar
    CaptainRich Posts: 4,492, Reputation: 537
    Cars & Trucks Expert
    		  
    #6

    Jul 26, 2011, 03:31 AM

    High resistance (fried) in either the power or ground side can create charging issues.
    Both positive and negative cables need to be voltage-drop tested to insure their integrity. Simple resistance testing won't reveal if the circuit can break down under a load.
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
    Uber Member
    		  
    #7

    Jul 26, 2011, 06:09 AM

    Use abrasive cloth to clean the "B" connector on the alternator. Likewise, clean the other end of the cable going to the battery. Depending on the car, it may be where the cable attaches to the "mega" fuse on the end of the under hood fuse box. Afterwards, apply dielectric grease.
    diabolicalaj's Avatar
    diabolicalaj Posts: 4, Reputation: 1
    New Member
    		  
    #8

    Jul 26, 2011, 08:23 PM
    OK found the problem the wire that connects to the starter n the alternator from the battery was not secured tight enough bt thank you for your inputs...
Not your question? Ask your question View similar questions
 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

My car battery light coming on what's wrong? [ 1 Answers ]

I have a 07 astra sport 1.9cdti sri,the battery light has just started to come on a few seconds after starting engine can anyone please advice

What's wrong with the battery if its new and the battery light comes on [ 4 Answers ]

Just got a new battery fully charged and also got a new alternator but the battery light comes on after starting the car but it still runs... confused

Battery light comes on [ 1 Answers ]

The battery light comes on occasionally when driving; 7.3 liter diesel ford

Battery Light Comes on 10 min after start Brand New Battery [ 9 Answers ]

1999 chrysler lhs 116500 miles brand new battery and altenator... battery light comes on about 10 minutes after starting car and driving. Brand new battery checks out fine lights flicker on and off sometimes and radio sometimes goes out for a second... now car will not start but electricity works...

Engine light and battery light on sametime [ 3 Answers ]

I have an 06 fatboy and just changed the battery the engine light and battery light stays on any thought

View more questions Search