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In Reply to: John Deere f510 mower problem posted by Rod on Tuesday, August 04, 2009:
Seat sw most probable cause,check that sw tight in mount,connector & sw contacts clean and tight,sw plunger being hit by seat & plunger of sw being fully depressed by seat,after checking above if still having cutout problem,remove connector from seat sw,connect an ohmmeter or powered test light to sw,the most commonly used circuit is with sw plunger depressed you shouldn't get a meter reading(blank readout or infinity)or a light from test light,release plunger,should get 0 ohms on meter/light from test light,operate plunger several times by hand to confirm operation,sw may be worn internally,contacts bad/going bad or dirt in sw causing same to stick,if sw operation in doubt,replace sw.Try disconnecting seat sw connector,start tractor,see if you still have cutout problem,if you do,install a jumper in connector & try again,if tractor still cuts out,if cut out cured with/without jumper replace seat sw,if not problem in either other safety sw's or wiring harness.Check owners manual for a wiring diag.
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