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azbohunter's avatar
azbohunter
Explorer
May 02, 2021

charger side of Magnatek 7300

I have a suspicion that my charger is not putting out DC to recharge batteries in my rig. I have lights and 12 volt to accessories in trailer but batteries are dead. I am not sure how to test it even after reading several articles and watching YouTube videos. If the battery is not hooked up I get nothing coming out of the dc side of charger, I have 110 going in at the lugs on the charger, the fuses for reverse polarity and charger are both good. Is there a way with a multi tool to test output on the charger side?
Thinking about just replacing it with a Progressive Dynamics 4655 and being done with it.
  • BFL13's avatar
    BFL13
    Explorer II
    May 02, 2021
    110v does not go to any "lugs". Your 110v has a black and white wire. black goes to the bottom of one of the circuit breakers and the white goes to the neutral buss. Make sure that circuit breaker has not popped.

    You should see 13.8ish at the lugs on the DC panel across the blue pos and white neg output wires from the converter. Battery connected or not.

    Your 11.6 is battery voltage to the DC panel and you have no output from the converter, so if the RP fuses are ok that means no 110v in. check that circuit breaker
  • azbohunter's avatar
    azbohunter
    Explorer
    May 02, 2021
    and if I do that should I be getting around 13.5 to 14 volts on the output side?
    my batteries test at 11.6 volts (2 6 volt) and volt meter show 11.6 at terminals coming out charger.
  • 2oldman's avatar
    2oldman
    Explorer II
    May 02, 2021
    Hook an uncharged battery to it and take a voltage reading.

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