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Electrical Problems

Discussion in 'Truck & Equipment Repair' started by Khowie644, Sep 21, 2012.

  1. Khowie644

    Khowie644 Member
    from Maine
    Messages: 93

    So can't seem to figure out my 04's light dimming issue
    Has new this year, Dual-battery set up, Both batteries 1100CCA, 250A alt. 0/1 Wire upgrades on battery to chassis, chassis to engine, battery to engine, and cab to chassis.
    So problem is whenever I use anything that draws large amounts of power (Windows/plow/Defrost) my headlights, in cab roof light, and dash lights all dim.
    Thoughts on what the issue is?
     
  2. forbidden

    forbidden Senior Member
    Messages: 392

    Somewhere you may have a super high resistance on something. Start metering your ground returns. Seen a bad ground on a firewall of a Ranger cause all sorts of havoc on a electrical system. Are you at idle when the voltage drop is happening? Does it still happen at highway speed?
     
  3. forbidden

    forbidden Senior Member
    Messages: 392

  4. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,958

    Ck all them gnds. If you don't have get a wiring diag to make sure u have them all cked. Also don't trust those gnd straps they corrode fast
     
  5. MickiRig1

    MickiRig1 PlowSite Veteran
    Messages: 3,617

    Use the search function on the gray line above.
    Search : Charging, Low Power, Lights Dim, Duel Batteries -- etc. There is hours of reading there. It's an issue beat to death every year. When you say dim is it really dim or just dim a little? Any change from what you had before? Any high amp drain will drop the voltage a little and cause dimming. An alternator only puts out 1/3 of it's rated amps at idle.
     
  6. Khowie644

    Khowie644 Member
    from Maine
    Messages: 93

    Sorry, forgot to respond
    Checked all the wires I installed for resistance and came up with a 0 on every one.
    So I took the extra 18ft. of 2ga I had laying around and added some more grounds, seemed to clear up the issue.
    Guess you never can have to many grounds. :mechanic:
     
  7. MickiRig1

    MickiRig1 PlowSite Veteran
    Messages: 3,617

    You know to protect the connections with Dielectric grease right? I put it on everything but my toast.
     
  8. Khowie644

    Khowie644 Member
    from Maine
    Messages: 93

    I put it on everything, including my toast.
     
  9. dieselss

    dieselss PlowSite Fanatic
    Messages: 10,958

    Who needs toast lol