Charging system question

Discussion in 'Technical' started by MarulMav, Aug 9, 2006.

  1. MarulMav

    MarulMav Member

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    The following items have been placed on my Mav in the past couple weeks: 80 amp alternator, high torque mini starter, rebuilt duraspark, electric fan. Problem: the only item not changed was my year old battery. Had to jump start the Mav, ran great till I turned it off. Turned the key again, this time solenoid didn't even click. Sounds like my battery is not putt'in out enough juice for the starter? Put battery on a charger, reads fully charged; over 13.5 on the meter. Put a test light on the battery goes from bright to dim. Is a 506 cold cranking battery to weak?:confused: The mini starter works/sounded great the couple times I did hear it.
     
  2. greasemonkey

    greasemonkey Burnin corn

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    check the wire from the solenoid to the starter with a volt meter in the start position and see if it has voltage.
     
  3. MarulMav

    MarulMav Member

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    Ran out and checked it. Set the meter at 20v and shows a current of 1.22:huh:



     
  4. 71gold

    71gold Frank Cooper Supporting Member

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    "HERES' YOUR SIGN"
     
    Last edited: Aug 10, 2006
  5. MarulMav

    MarulMav Member

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    ??????????????????:confused: ?????????????????????



     
  6. MarulMav

    MarulMav Member

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    Can you elaborate? I take it theres not supposed to be any juice from there? By the way it's also a new solenoid and voltage regulator.



     
  7. MarulMav

    MarulMav Member

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    Any suggestions? Anyone?
     
  8. don graham

    don graham MCG State Rep

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    dosen't sound like the battery to me. should at least turn over if it is charged. probably should have changed one item at a time and made sure it worked each time. maybe i'm missing something but if you put the meter on 20v it dosen't read current. has to be on amps??:)
     
  9. blugene

    blugene Senior member Supporting Member

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    Wouldn't that be a cable?
    Check all connections, esp ground to block. How do the batt cables look? Have the ends been replaced and loose? More details...:drink:
     
  10. Fordmaster169

    Fordmaster169 Member

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    I have had many occasions that a battery has plenty of voltage but no amps.(plate shorted inside battery) Put the meter on the battery while it is in the car and try to start it. If the voltage drops below about 10 volts the battery is probably junk and needs to be replaced. Check the voltage at the battery while running, Make shure that all and I mean all connections are clean and tight. It should not be very hard to locate the problem, just takes time.

    Don
     
  11. MarulMav

    MarulMav Member

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    Blu-The only cable replaced was the solenoid to starter with factory installed ends. The others were in great condition so were not removed. Gotta go to work today but will be out in the garage again tomorrow.



     
  12. ATOMonkey

    ATOMonkey Adam

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    A battery is composed of several lead plates + and several lead dioxide plates - immersed in sulferic acid. When you complete the circuit between the lead plates and the lead dioxide plates, a chemical reaction occurs and the result is electricity and the lead transforming to lead sulfate. When you add electricity to the battery, the lead sulfate turns into lead and sulferic acid again. Over time this reaction will cease to occur in some parts of the plate, but will continue in other parts. This will still give you 12V, but the number of available electrons will be reduced, so even a small load can completely drain the battery of all available electrons. After a while, the lead material will be degraded to a point where the reaction no longer occurs.
     
  13. MarulMav

    MarulMav Member

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    Would this be the reason my test light goes dim when I hook it up to the battery?

     
  14. mean_maverick

    mean_maverick Senior Member

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    Sounds Like You Might Need To Invest In A New, Quality Battery. Optima Is A Good Place To Start.... I Like Mine :D
     
  15. Mavaholic

    Mavaholic Growing older but not up!

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    First thing I would do is take your battery to almost any parts store and have it load tested. Then go to Radio Shack and buy a digital Voltmeter (around $20). Very handy thing to have. Measure battery voltage with everything off. Should be a little over 12 volts. Start your car, If it wont start, jump it. At a healthy idle (700-800 rpm) you should now read around 13.8 volts across the battery, If so, your charging system is working. IF not, you have charging problems.
     

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