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I need a wiring schematic for a craftsman 15.5hp riding mower with a Kohler engine that doesn't have a regulator.

I replaced the stater but still have a problem. It keeps burning out the diode. The wires also came out of the plug and I'm not sure if they are in the right place. Also I have a white wire coming out of one of the two relays. 87 isn't hooked to anything.Please help.

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Craftsman , Lawn Mowers
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Manage My Life
Okay, I talked to a Kohler rep. about this. They said that the yellow wire from your stator will connect to the loose wire on relay terminal 87A, as well as the orange wire leading back to the headlights. I've never seen one run this way, but it makes sense. All the relay is doing is working as a safety device to help shut the engine down in case of an emergency. It just helps drag down the flywheel speed to make the engine shut down faster than it does already.
by Manage My Life
July 6th, 2011
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Manage My Life
The yellow wire from 87A should go to the green stator wire for the stator brake. But you do not have the yellow wire which means that stator does not have a stator brake. The 2 wires from your stator are DC voltage for charging/running the tractor and the yellow is for the headlight circuit. The bottom line is that if your stator does not have a green wire then the yellow wire from 87A does not connect to anything.

When I said "metered", I was referring to taking ohms readings across various points of the harness to fine out what goes where. There should be 2 relays on this tractor and the 87A of one goes back into the harness and ends up at terminal "L" of the ignition switch. 87A of the other (the one in question) should go to the engine harness and to the green wire of the stator. But you do not have a green wire. Which makes me question if you have the correct stator or not.

If you do not have the green wire on the stator, you should be able to leave the yellow wire from 87A connected to nothing (but taped up on the end) and the tractor should run as normal with no complications.
by Manage My Life
July 6th, 2011
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Manage My Life
What do you mean by "metered"? My question is does the yellow wire from 87a go to yellow or black wire from stator to act as the stator brake?
by Manage My Life
July 5th, 2011
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Manage My Life
I think the wire from 87A should be yellow. I show 2 relays and each has an 87A, one has a black wire off 87A and the other shows a yellow wire from 87A. A faded yellow wire is going to look white in many cases. The wire colors may not always match what we show on the schematic and in that case the each wire would have to be metered out to find out where it should go and what it does.
by Manage My Life
July 5th, 2011
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Manage My Life
I replaced stator on 15.5 hp kohler engine Craftsman riding lawn mower. Mine has 2 wires (yellow and black). Problem is wiring had burned into. While rewiring, I came out with a white wire that comes from 87a terminal on operator presence relay not hooked up at stator. So when I start engine it burns out diode in stator harness. Where should the white wire hook that comes from terminal 87a?
by Manage My Life
July 2nd, 2011
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Manage My Life
The white wire that is loose is the wire that would connect to the green wire on the stator is you had one. That's for the stator brake, but your stator does not have that so it shouldn't come into play. Just make sure that wire is not naked at the end.
by Manage My Life
June 27th, 2011
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Manage My Life
Black wire from diode goes to a connection that plugs into a red wire going to the key switch. My stator has only 2 wires, yellow and black. White wire that comes off of relay 87a terminal is loose on the other end (don't know where it connects).
by Manage My Life
June 24th, 2011
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Manage My Life
Okay. This schematic is from Kohler. they do not take into account anything about the tractor harness so what they show is a very basic system. But the colors they list for the alternator should be correct. Also, I attached the link for the repair manual for that engine. They have test procedures and repair procedures in the shop manual.
by Manage My Life
June 24th, 2011
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Manage My Life
I found a schematic that is a little better. The wire colors on the schematic will match the tractor wiring but not the engine wiring.
by Manage My Life
June 24th, 2011
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Manage My Life
I have the same issue with our schematics as well. What color and where are you connecting the black wire with the diodes? The wire with the diodes is for the charging system and should not run through the relays. From under the engine shroud you should have a black, a green, and a yellow wire. Is that green there? the green wire will connect up to one of the relays. I'm still looking for a schematic that has all the colors listed.
by Manage My Life
June 24th, 2011
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Manage My Life
Schematic in manual for craftman mower model-3917271021 Does not show wire colors or all connections
by Manage My Life
June 24th, 2011
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Manage My Life
on craftsman mower model# 917271021 the white wire comes from 87a on operator presence relay. The other end is not connected. This is 15.5 koler engine. when I connect black wire from stater diode starts getting hot and burns out. yellow wire is connected . The headlights work fine.This is why I need the wiring schematic and the question answered on where the white wire goes.
by Manage My Life
June 24th, 2011
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Manage My Life
the wire is coming out of 87a instead of 87
by Manage My Life
June 24th, 2011
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Manage My Life
model#917271021
by Manage My Life
June 24th, 2011
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Manage My Life
I will need the model number of the tractor in order to find a schematic for it. You can also go to the "manuals" section of our site and put in the model number to view the manual. The schematic is usually in the manual just before the parts pages.

Thank you for using Manage My Life!
by Manage My Life
June 24th, 2011
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Joseph Perez
When making some major repairs on your appliance, Manage My Life is here to help. While you are waiting for your expert answer, I know that only the expert can provide you with a wiring diagram. I did manage to find a link in where you can enter your appliance model number and a parts list diagram will pop up. I hope my link is useful.
by Joseph Perez Earned 1,551 community points in Craftsman
June 22nd, 2011
Answered in 7 minutes
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