JD X340 no electrical power

cityboy

Member
My intermittent problem is now a show stopper. I've had this mower about 3 years. I've put about 200 hours of the 750 total hours on the machine. Runs decent overall, but once in a while I loose electrical power. Hour meter goes blank. No pattern that I noticed.

Mowed last week, ran great.
Today, turn the key, no hour meter.
Turn key to start, nothing.

Electric is not my strong suit, but I know enough to...
.. battery 02/19 mfg date. 12.43 volts
.. I found 3 fuses. All ohmed ok.
.. Key switch has 7 slots, only 3 of them have wires. Switch seems to ohm ok when turned to the start position.

Since there is zero power to the hour meter, I think there is a short somewhere.

Any help appreciated.
Thanks much.
 
"I think there is a short somewhere."

More likely a poor connection/intermittent "open", a "short" would blow a fuse.

Look at all electrical connector body "pins" for signs of looseness, corrosion, or heating, as well as connections at switch terminals, etc..

Look at the ground side, as well, for something loose or corroded, having the engine and chassis and the appropriate electrical parts all connected together on the "ground" side is just as important as having the "power" side connections in good condition.

It sure would help to have a factory service manual, or even a wiring diagram, but DEERE keeps a tight rein on their "intellectual property", making finding that info on-line for free unlikely.

GOOD LUCK!
 
had a very aimilar gremlin with this beast im worikng on now ,,it was the ignition switch..it tested intermitent on the bench,in a few of the switch positions,,replaced it and
grelins departed,,good luck john
 
Having it quit completely is actually a
blessing as now the problem can be found.
No start can be the safeies but since you
have no hour meter you have a supply or
ground issue. The connector at the key
switch is a known problem spot. I would
start testing at the battery. Place one
lead on each cable(not the posts) if you
have voltage great. Now move the ground
lead to a clean spot on the frame or bolt
head. If you loose 12V you need to ckean
the ground connection. If you have 12V
clamp the ground lead on the good ground
so you don't have to hold it. Pull the
plug off the switch and check for voltage
at the plug. If the spades on the switch
or plug are corroded I would suspect the
issue is there.
 

Would a bad starter/solenoid cause this issue?
Turning the key, been having a click/click/click on occasion when starting. Usually when cold.

Thanks again.
 
Check the connections behind the battery the battery gasses tend to corrode some of them have found this several times wire looks good but is corroded in two inside the insulation
 
Took the mower to the dealer.
A new engine wiring harness was the fix.
The red wire from the starter was missing the spring tab that makes contact w/the male spade.
Talking w/the service mgr, he stated this would have caused an intermittent starter issue as well.

Mowed yesterday with no issues.
Time will tell if this is a long term fix.
 

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