Kubota BX2660 – electrical power loss

JeepinMaxx

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BX2660, LA243 FEL, RCK54P-23BX MMM, BX2751 QH Subframe, BX2750D 50" Blower
Mar 27, 2018
296
8
18
Columbia, CT
Kubota BX2660 – power loss on headlights, dash lights, digital tachometer, lift pump and gauges. Glow plugs, 12 volt accessory port , and hazard lights still work – all the fuses on the panel tested good including the 50 amp main fuse, battery is full voltage and cranks up in seconds despite no lift pump -any suggestions?
 

85Hokie

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BX-25D ,PTB. Under Armor, '90&'92-B7100HST's, '06 BX1850 FEL
Jul 13, 2013
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Bedford - VA
mice? wiring chafed?
 

Dave_eng

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M7040, Nuffield 465
Oct 6, 2012
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Kubota BX2660 – power loss on headlights, dash lights, digital tachometer, lift pump and gauges. Glow plugs, 12 volt accessory port , and hazard lights still work – all the fuses on the panel tested good including the 50 amp main fuse, battery is full voltage and cranks up in seconds despite no lift pump -any suggestions?
What is battery voltage when the engine is running?

I want to see if the alternator is charging.

The alternator has a three wire plug in terminal where one of the three wires is a signal to the tach so it can display engine rpm.

Dave
 

JeepinMaxx

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BX2660, LA243 FEL, RCK54P-23BX MMM, BX2751 QH Subframe, BX2750D 50" Blower
Mar 27, 2018
296
8
18
Columbia, CT
Thanks for the feedback - voltage running is 12.7 volts. Can't see any damaged wires. Ran it for a couple hours doing leaves on thanksgiving no problem - just no gauges, tach/hour meter, lights (glow plugs worked fine)
 

GreensvilleJay

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BX23-S,57 A-C D-14,58 A-C D-14, 57 A-C D-14,tiller,cults,Millcreek 25G spreader,
Apr 2, 2019
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I downloaded the WSM from KB...
From what doesn't work, I suspect an open ground. Grounds are black wires.
Dash, headlights, fuel pump, etc. should all have a black wire connected 'somewhere' to chassis ground.
Inspect the wiring harnesses and see WHERE the black wires go....maybe a 'butt connector' came off ??
I'd have to see the tractor to help more.
 

JeepinMaxx

Member
Lifetime Member

Equipment
BX2660, LA243 FEL, RCK54P-23BX MMM, BX2751 QH Subframe, BX2750D 50" Blower
Mar 27, 2018
296
8
18
Columbia, CT
I downloaded the WSM from KB...
From what doesn't work, I suspect an open ground. Grounds are black wires.
Dash, headlights, fuel pump, etc. should all have a black wire connected 'somewhere' to chassis ground.
Inspect the wiring harnesses and see WHERE the black wires go....maybe a 'butt connector' came off ??
I'd have to see the tractor to help more.
Thanks - a bad ground makes sense. I'll at it tomorrow
 

Mark_BX25D

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Bx25D
Jul 19, 2020
1,611
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Virginia
12.7 running is not good. That's probably not your immediate problem, but running voltage should be 13.8-ish.
 

Boatman

Active member

Equipment
Kubota L2800, Kubota BX1870
Nov 26, 2016
167
54
28
Mill Spring, NC, US
I had a very similar issue with my BX1870 a couple years ago. Turns out the wires going to the fuel pump were pinched by the MMM gearbox.