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Weird Electrical Issues T660

Discussion in 'Kenworth Forum' started by sixshooterz, Oct 29, 2017.

Page 2 of 2
  1. Nov 14, 2017 #11
    x1Heavy

    x1Heavy Road Train Member

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    Mar 5, 2016
    White County, Arkansas
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    Letting it cool while draining truck 1V a hour?

    Yeesh, that's like a form of ... suicide. Either way don't you think maybe to replace that Regulator?

    Im having a hard time dealing with the voltage regulator concept because in my mind you are taking me back to one of my old cars and those made in the 60's that had that. Alternators took over that task making the VR unnecessary.

    The problem is complicated by the need of a computer all over that truck to maintain at least 9 something volts to stay booted. Otherwise they go off line.
     
    x1Heavy, Nov 14, 2017
    x1Heavy, Nov 14, 2017
    #11
    sixshooterz Thanks this.
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  3. Nov 15, 2017 #12
    sixshooterz

    sixshooterz Bobtail Member

    13
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    Jun 14, 2011
    Newnan, GA
    0
    Update Nov 15th

    Replaced the alternator this past Saturday and the issue persisted. Replaced all the batteries on Sunday and everything ran fine til this evening when the voltage started dropping again.

    Only thing I neglected to mention in my original post was that the previous owner had a power inverter installed. It was installed well, with a fuse in the battery box before coming thru the floorboard. Tonight I disconnected that.

    Next on the docket is the 2 relays in the fuse block under the steering wheel and possibly the low voltage disconnect.

    Is it I need any way possible that there’s a bad pigtail wire that goes between the trailer and truck? The previous owner had a spare in the side box so I’m wondering if that’s why? Everything looks good, no frayed sheathing or anything.

    Thanks again all!
     
    sixshooterz, Nov 15, 2017
    sixshooterz, Nov 15, 2017
    #12
    x1Heavy Thanks this.
  4. Nov 15, 2017 #13
    x1Heavy

    x1Heavy Road Train Member

    34,017
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    Mar 5, 2016
    White County, Arkansas
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    I am not a expert by any means on the pigtail. Things have changed since the ABS etc has gone into trailers. In that pigtail should be a massive ground of sorts back to the tractor. IF that trailer wanted to be a parasite it might drain the tractor.

    But.... eh... thinks carefully... let's consider you have not said a word about having a trailer on or not. I would presume you are complaining just about the tractor. It would have been easy to overlook that trailer as a electrical parasite in some way.
     
    x1Heavy, Nov 15, 2017
    x1Heavy, Nov 15, 2017
    #13
    sixshooterz Thanks this.
  5. Nov 15, 2017 #14
    sixshooterz

    sixshooterz Bobtail Member

    13
    3
    Jun 14, 2011
    Newnan, GA
    0
    It happens reagardless of if a trailer is hooked up or not, was just thinking if there were a short or something in there it could drain the batteries and possibly not blow a fuse.
     
    sixshooterz, Nov 15, 2017
    sixshooterz, Nov 15, 2017
    #14
    x1Heavy Thanks this.
  6. Nov 21, 2017 #16
    sixshooterz

    sixshooterz Bobtail Member

    13
    3
    Jun 14, 2011
    Newnan, GA
    0
    So! After the new alternator and 4 brand new batteries, I was left stranded on the side of the road. Called a mobile repair guy to come charge my batteries so I could at least get home. He pulled off the battery cover and within 60 seconds said "something isn't right. Turns out that the batteries were working in pairs and only one pair was connected to the alternator. The other was powering the ecm. Somehow, while MHC Kenworth did their walk thru on this truck, the fact that all four batteries weren't connected slipped past their "expert" technicians. Problem solved!

    Side note, if you're ever broken down or I 85 in Georgia between ATL and SC, call Evans Mobile Truck Repair.
    (770) 820-4748
     
    sixshooterz, Nov 21, 2017
    sixshooterz, Nov 21, 2017
    #16
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  7. Nov 21, 2017 #16
    Call_Me_The_Breeze

    Call_Me_The_Breeze Medium Load Member

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    Dec 30, 2015
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    Sometimes it just takes a fresh (and trained) pair of eyes to look at it. Glad you got it figured out.

    I once had a 45k mile, 2 year old PornStar with incorrect fuel transfer line connections. Right tank ran dry with the left tank full. Had been to the dealer numerous times. Wanna guess who figured THAT one out?
     
    Last edited: Nov 21, 2017
    Call_Me_The_Breeze, Nov 21, 2017
    Call_Me_The_Breeze, Nov 21, 2017
    #16
    sixshooterz Thanks this.
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