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John Deere STX 38 wiring question

34K views 19 replies 10 participants last post by  Restrorob  
#1 ·
I'm trying to correctly wire the starter solenoid, starter, and battery in this mower. The mower will start with a jump, but not on its own. The starter, solenoid, and battery are all new, so I am replacing the 2 positive wires and 1 ground wire. Does anyone have a diagram of what the solenoid should look like with all the wires hooked up to it? I have a wire from the battery to the rear of the solenoid, then a wire from the front of the solenoid to the starter. There is a wire from the ignition switch to the solenoid and a black wire that goes from the solenoid up front somewhere, but I can't find where it goes to. Any help would be greatly appreciated. Thanks.
 
#2 ·
You have checked the fuses right?

I don't have a schematic, but solenoids can be of several different configurations.
The wire from the ign. switch should supply 12V when in the CRANK position in all cases.

The other small wire on the solenoid can do a couple different things.
1. It might just be a ground to complete the circuit from the other small wire.
2. It could feed 12V to other accessories like fuel solenoid, coil etc) during cranking.
3 probably something else I didn't think of:)

First, just try jumping 12V directly th the terminal that the "crank wire" connect to. If the engine cranks, it means you aren't getting 12V from the ign. switch when cranking.
IF NOTHING HAPPENS, Ground the other small wire and repeat. Unless the engine cranks, don't jump for very long!
 
#3 ·
a black wire that goes from the solenoid up front somewhere, but I can't find where it goes to.
Deere Diagrams are hard to come by, They are tight with their info.....

The above wire does what bill stated as #1 and is most commonly tied into the safety switches (clutch/parking brake) switch. When one of the two are depressed it completes the ground circuit to activate the solenoid.

You could run a jumper lead and ground this wire/post and if you have power in start position to the other small post it should crank over.

And Bill.....I like #3 :laugh:
 
#4 ·
I've got the wiring diagrams for the STX mowers, if you'll look up the serial number I'll put it up on the site for you. If you have
a DSL or cable internet connection, I'll email you the whole service manual for the STX series mowers. The file is about 45 mb, that
is why you need a cable or DSL connection on account of the size of the file.
 
#5 ·
I've got the wiring diagrams for the STX mowers, if you'll look up the serial number I'll put it up on the site for you. If you have
a DSL or cable internet connection, I'll email you the whole service manual for the STX series mowers. The file is about 45 mb, that
is why you need a cable or DSL connection on account of the size of the file.
Sn m00stxc300272

please email me if you can to trimlawn@hotmail.com
 
#16 ·
I've got the wiring diagrams for the STX mowers, if you'll look up the serial number I'll put it up on the site for you. If you have
a DSL or cable internet connection, I'll email you the whole service manual for the STX series mowers. The file is about 45 mb, that
is why you need a cable or DSL connection on account of the size of the file.
Please send me a copy of the service manual my STX is MOOSTXB015366 send direct to my email: woodhog@windstream.net
 
#17 ·
I've got the wiring diagrams for the STX mowers, if you'll look up the serial number I'll put it up on the site for you. If you have
a DSL or cable internet connection, I'll email you the whole service manual for the STX series mowers. The file is about 45 mb, that
is why you need a cable or DSL connection on account of the size of the file.
thank you i need a diagram for a stx 38 with the serial # moostx4627985
 
#18 ·
Hmmm...... Haven't seen fly-4-fun around here in a long time....
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I believe this is the one your looking for;

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Good Luck
 
#20 ·
Hmmm..... I bought my manuals from fly-4-fun, I don't have a STX38 diagram that shows a safety switch system relay. Only a start relay that ties in with the safety switches ?

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