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.
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?
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.
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.
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.
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