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JD 425 no start


 
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Don-Wi
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Joined: 12 Aug 2002
Posts: 8483
Location: Hilbert, Wi

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PostPosted: Tue Jul 31, 2012 6:04 pm    Post subject: JD 425 no start Reply to specific post Reply with quote

We finally got enough rain to have to cut the lawn, but the lawn mower won't start.

Here's what I've got:

The engine will turn over if I jump it at the starter.

When I turn the key on the dash lights up, but nothing when I turn it to the start position.

There are 2 lights on the circuit board under the dash. The green light comes on when the seat switch is pressed, but the red one never comes on. I know it normally does.

I don't hear the fuel pump kick in when i turn the key like normal

I swapped the fuses on that board and it made no difference. I pull one and the headlights don't work, I pull the other and the dash lights go out.

Point me in the right direction here guys...

Donovan from Wisconsin
 
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504
Tractor Expert


Joined: 14 Jun 2005
Posts: 2950


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PostPosted: Tue Jul 31, 2012 7:41 pm    Post subject: Re: JD 425 no start Reply to specific post Reply with quote

This is just a guess, on the 455 and 445 there is a
fuse hanging in the harness by itself not on the
board. That is the one that runs the fuel pump.
That will be on the right side above the circuity
board. ( mine did not even show up on the wiring
diagram)
 
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cjk
Regular


Joined: 09 Jul 2001
Posts: 141
Location: SE Wisconsin

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PostPosted: Thu Aug 02, 2012 4:28 am    Post subject: Re: JD 425 no start Reply to specific post Reply with quote

Here is what the manual says about the red LED.

The PTO red LED (C) indicates that there is power to the PTO relay
(D) coil through either of the following circuits:
Key switch on, operator on seat, park brake disengaged, and PTO
turned off (PTO pre- operation circuit).
Key switch on, operator on seat, PTO turned on, park brake
disengaged, and ignition relay engaged (PTO operation circuit).
When diagnosing a problem using the LEDs, and the LEDs are off,
check that part of the circuit before the control/fuse module LEDs
(neutral start or PTO pre- operation circuit). When the LEDs are on,
check that part of the circuit after the control/fuse module LEDs.
Tests for voltage or ground will be at the control connector (I) or
the power connector (J) of the control/ fuse module and not on the
printed circuit board paths.
The ignition relay (B), PTO relay (D), start relay (E), fuse terminals
(H), key switch (K), ignition LED (A), and PTO LED (C) are mounted
on a printed circuit board. The components are solid state and are
not serviced separately except for the 15 amp fuses.
 
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Don-Wi
Tractor Guru


Joined: 12 Aug 2002
Posts: 8483
Location: Hilbert, Wi

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PostPosted: Fri Aug 03, 2012 3:56 am    Post subject: Re: JD 425 no start Reply to specific post Reply with quote

All right, you got me thinking. The tractor starts now, one out the kids pulled out the pto switch. It'll start but now it won't stay running for more than a few seconds our maybe a few minutes. It'll die like you turned it off, and most times it'll start right back up. Other times it won't.

Donovan from wisconsin
 
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