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Message: <blockquote data-quote="markplow" data-source="post: 39390" data-attributes="member: 4184">I have found lots of similar posts on here to my problem, but have not been able to resolve the issue. I have seen reference to a thread called "LX665 Won't Start", but can't seem to find this exact thread for some reason.Here are the details. - LX565 ~1994 - Intermittently will not crank when key is turned to start position. Relays click , but starter does not engage. - Switch to service mode and it starts every time. If started in service mode and then switched to run mode with the engine running, the engine dies. Is this normal? -Audible clicking, seat belt light going out on dash and several multimeter checks suggest that the seat/seat belt interlocks are working. - Interesting observation... When I sit in the seat and put the seat belt on, the "fasten seat belt" icon on the dash goes out. When I turn the key to the start position though, the "fasten seat belt" icon illuminates. It acts like when it is in the start position the seat/seat belt interlock is "dropping out".When the "fasten seat belt" icon illuminates it also locks the control pedals (i.e. key on, engine not running, = pedals move freely. Turn key to start position and hold (assuming engine does not start), and the pedals lock)It's like the logic fails for some reason in start mode, but not in key-on mode. Could there be a big voltage drop somewhere causing this.....??? - We have replaced the start interlock relay and this made no difference. Actually my dad replaced all the relays in the engince compartment panel just to be sure and it made no difference. - We jumped across the starter switch (just to make sure there was not some crazy voltage drop acrossed it) and got the same results. -To me I can't see how it is any of the following that is the problem -Starter - starts fine in service mode -Ignition Switch - Same result when jumpering across it -Seat Switch - audible clicking of relay when this switch contacts -Seat Belt Switch - audible clicking of relay when connected + icon goes out on dash - Interlock Relay - audible clicking, plus already replacedI saw a post saying a similar problem turned out to be the "service/run" switch. I'm digging into that now (don't have one to just change it out). To me the issue is being caused by the operator presence interlock circuit "opening" when you turn the key to the start position. I don't understand the circuit enough to see what the connection could be between these two activities.Of course I could always go with the standard "replace the EIC" fix, but my experience tells this is often not the real issue... plus it is expensive.For reference, I worked for NH in the past and got to work with the group that evaluated what was wrong with all the EIC's that were sent back. The VAST majority of the EIC's had no problems with them. In my hands-on experience (working with customer and test machines at NH) I have never found an issue that actually turned out to be this EIC (not to say that it never happens....).Any thoughts on where to go with this? Thanks in advance for any help you can provide. Mark</blockquote>

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