Jim,
My controller is number 259233 so that may not be of any help to you. I'm afraid your way ahead of me on the trouble shooting. I hope some of our forum experts jump in here with some ideas.
Chet Geist
1981 FC33, Austin, Texas
Thanks Chet for the advice, so here goes with all I know about the 
gen:
The gen had been working fine but on the last trip home we tried 
starting the gen while driving and couldn't get it started. I jumped 
at throwing a new remote rocker switch in thinking the switch had 
stuck closed. The reason I thought this was that the cranking reset 
button in the gen compartment control box had tripped and when I 
pushed in back in, the gen tried starting without doing anything. 
weel, the new rocker switch didn't help. I removed the three wires at 
the long connection block that go to the remote switches, still no 
solution. I have 5 eleven pin relays in the control box, and saw one 
that had burned a hole through the side, and replaced it. I then 
visually checked for any other signs og bad wiring, nothing. The 
other four relays are all the same number, so I bought one and moved 
it around to each relay to find a bad one, nothing. So I think all 
five relays are good. With everything hooked up except the positive 
battery cable, when I connect it, engine turns over, but no start. 
After a short itme, the cranking reset button trips. While it is 
cranking, I have power to the fuel solenoid. So I tried a little 
ether in the air filter while cranking, nothing. So now I disconnect 
the wire on the S side of the starter solenoid, hook up the battery 
cable and have a 10A draw on the amp guage on the front of the 
control box. One of the 11 pin relays clicks, the round solenoid type 
switch on the bottom of the control box also clicks and all stays 
like that till the cranking reset button trips. Also, when everything 
is connected and I connect the battery, it doesn't matter if the 
toggle switch on the control box is in the start or stop position, 
it's the same. Not really sure where to turn, I'm not in an area 
where I know of a shop that might help. I have been referred to EC 
POower Systems in Boise as the nearest Kohler Rep. Eric there has 
been very helpful, he's the one that got me a copy of the schematic 
that I believe is correct, he got it from Kohler, but it is not all 
legible. It has helped some. I have controller A-259677 and the 
schematic I have has a Kohler part # 259678. When I run the sequence 
of connecting to battery, after the cranking button trips, the 
amperage draw is 0 and it will sit forever that way.I'm not that 
experienced to figure this out any more, but thought with the right 
schematic, I would have something to bring to someone local and try 
to get it going. Sorry for the lon message, maybe someone will read 
this and know exactly what is wrong!!! Thanks, Jim