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  1. #1
    Silver Member jonnyc1999's Avatar
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    Nov 2010
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    172
    Location
    King William, VA
    Tractor
    Bobcat CT122

    Default CT122 electrical gremlin

    Hey guys, I'm hoping you can help me before I have to pay someone to come out and look at my tractor. The other day, I started my CT122 up and piddled around with it for roughly 30 minutes. I shut it down to do something, and 10 minutes later came back to the tractor to start it. Nothing happenned! Well, to be more precise, nothing that I WANTED to happen. The dashboard lights were barely visible but flickered and made a crackling sound, and turning the key didn't engage the starter at all. I assumed it was a faulty ignition switch so replaced it, which didn't help anything. I tested the battery at 12.1 volts.

    I'm not well versed in anything electrical, so any help you guys could give would be GREATLY appreciated! I would hate to call a technician out for something stupid. My dad thinks it sounds like some sort of relay issue, but I don't know what a relay looks like or how to test one! Thanks in advance for your help.

  2. #2
    Super Member MossflowerWoods's Avatar
    Join Date
    Aug 2011
    Posts
    5,485
    Location
    Ladysmith, VA
    Tractor
    Kioti DK50SE HST w/FEL, John Deere LX266 & STX38 Mowers. Stihl MS290 20" bar, & FS190

    Default

    Check for loose/corrodded terminal on batttery.
    Former Submariner & Army SGT
    2011 Kioti DK50SE HST, KL-401 FEL w/72" bucket, tooth bar, & Ratchet Rake, 2 rear remotes, canopy, WR Long RBG72 Grapple, Woods BB72X cutter & TSG-50 stump grinder, TSC PHD, & more to come. Mowers 2003 JD LX266 42" deck mower, & old JD STX-38 (12.5 hp).

    Managing 51 Acres of Virginia hills with ponds & streams, mature market timber, riding trails, horse pasture, long gravel drive, veggie garden, & yard.

  3. #3
    Silver Member jonnyc1999's Avatar
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    Nov 2010
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    172
    Location
    King William, VA
    Tractor
    Bobcat CT122

    Default Re: CT122 electrical gremlin

    I looked at the battery terminals, and the ground on the negative side looked a little rusty.... however, I ran a jumper cable from the ground to the engine block and didn't fix anything. It was pouring rain, then snow, when I was last looking at it, so I'm going to clean the ground tonight and retry.

  4. #4
    Veteran Member SSdoxie's Avatar
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    Jun 2010
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    1,911
    Location
    Cumberland Plateau, TN
    Tractor
    Bobcat CT225

    Default Re: CT122 electrical gremlin

    Check both ends of both battery cable connections, especially the ground to frame connection.
    Dennis

    CT225 w/7TL QA FEL, 60"tooth dirt bucket, 68" smooth bucket, Pallet Forks, Bale Spear. Hydrualic top llin, QH, 48 RC, 60" tiller, Angle blade, Landscape rake, Carry-all, Post hole auger.

  5. #5
    Super Star Member k0ua's Avatar
    Join Date
    Jun 2009
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    12,810
    Location
    Branson, Mo.
    Tractor
    Kioti DK35se Hydrostat

    Default Re: CT122 electrical gremlin

    The majority of these type of problems are due to defective (corroded on the inside) positive and negative cables. They look fine on the outside but are full of the greenish white powder of corrosion on the inside of the cable and hence are a high resistance connection. Another common failure mode is a defective battery with a high resistance connection inside. It may show 12 volts but when you try to pull much current from it, it exhibits a severe voltage drop. You can measure that by having 2 persons to do this check. One person operates the tractor and tries to start it, and the other person measures the voltage directly on top of the battery posts, NOT on the connector clamps, but directly on top of the battery posts. If the voltage drops much below 12 when the instrumentation and lights come on or below 10.5 when fully cranking, then you have a battery problem. If the voltage stays up, but the tractor does not crank, and the instrumentation/lights are erratic, then the problem is further down the line. Simply move the voltmeter leads further down the line to find the voltage drop.

    James K0UA
    James KUA

    Kioti DK35se hydrostat with 2 QA buckets, 48 inch. King Kutter Rotary Cutter. 750 lbs ballast box. Loaded tires, Construction Attachments SSQA Lightweight Pallet forks. EA 50 inch single lid "wicked" Grapple. Satisfied Everlast PA160 welder owner How to add a link to a post . Best way to search TBN


  6. #6
    Super Member MossflowerWoods's Avatar
    Join Date
    Aug 2011
    Posts
    5,485
    Location
    Ladysmith, VA
    Tractor
    Kioti DK50SE HST w/FEL, John Deere LX266 & STX38 Mowers. Stihl MS290 20" bar, & FS190

    Default

    Jon,

    K0ua and SSDoxie are spot on. I was gonna say check other end of ground cable, but I know James is spot on about corroded cables also.

    Hope BobKitty runs tonight!

    I'm firing mine up later today for bonfire prep...
    1st time in Months...

    David
    Former Submariner & Army SGT
    2011 Kioti DK50SE HST, KL-401 FEL w/72" bucket, tooth bar, & Ratchet Rake, 2 rear remotes, canopy, WR Long RBG72 Grapple, Woods BB72X cutter & TSG-50 stump grinder, TSC PHD, & more to come. Mowers 2003 JD LX266 42" deck mower, & old JD STX-38 (12.5 hp).

    Managing 51 Acres of Virginia hills with ponds & streams, mature market timber, riding trails, horse pasture, long gravel drive, veggie garden, & yard.

  7. #7
    Silver Member jonnyc1999's Avatar
    Join Date
    Nov 2010
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    172
    Location
    King William, VA
    Tractor
    Bobcat CT122

    Default Re: CT122 electrical gremlin

    Ok thanks guys, I'm at work right now, but this afternoon I'll definitely check it out!

    I'm not looking forward to paying a technician to drive an hour each way to diagnose this problem, so I'm gonna do as much footwork as I can beforehand!

  8. #8
    Veteran Member SSdoxie's Avatar
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    Jun 2010
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    1,911
    Location
    Cumberland Plateau, TN
    Tractor
    Bobcat CT225

    Default Re: CT122 electrical gremlin

    12.1v is low voltage for battery with no load on it. 12.5 = about 80% fully chraged battery. When you turn the key for the first 15 - 20 seconds the glow pulgs are energized, which pulls significant amps so a with low battery or internal failure in battery it may not have enough reserve capacity to power up the dash.
    Do all the checks above, especially the vlotage drop test with key on that James described. Recharge the battery and retest the voltage drop under load again. If it drops down in that 10.5v range again have your battery load tested.
    Dennis

    CT225 w/7TL QA FEL, 60"tooth dirt bucket, 68" smooth bucket, Pallet Forks, Bale Spear. Hydrualic top llin, QH, 48 RC, 60" tiller, Angle blade, Landscape rake, Carry-all, Post hole auger.

  9. #9
    Silver Member jonnyc1999's Avatar
    Join Date
    Nov 2010
    Posts
    172
    Location
    King William, VA
    Tractor
    Bobcat CT122

    Default Re: CT122 electrical gremlin

    I was thinking 12.1 was a little low too, but what threw me off was that I had been using the tractor for ~30 mins prior to shutting it off for a few minutes. I guess when I get it started I need to figure out if the alternator is actually charging!

  10. #10
    Silver Member jonnyc1999's Avatar
    Join Date
    Nov 2010
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    172
    Location
    King William, VA
    Tractor
    Bobcat CT122

    Default Re: CT122 electrical gremlin

    well, I ruled out the battery tonight. After charging it for a bit, it read 12.5 volts. I couldn't sit on the tractor and get multimeter readings at the same time but by turning the key to run, the battery still showed over 12 volts. With the key on run, the dash flickers and hisses, but won't do anything productive. The starter will not engage.
    I ran the battery down to autozone and the battery tested slightly discharged but good, at ~450cca. When I got home I sprayed the positive terminal down with battery terminal cleaner to get rid of the small amount of corrosion and called it a night. I still need to test the voltage from the other side of the positive terminal to determine if the positive cable is the issue.
    At this point, I'm still considering that the issue is a relay. I'm guessing these are all under the dash? Is there a way to test if a relay has gone bad? Thanks again guys for your help, I'm enjoying learning about electrical stuff even though this is pissing me off!

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