Not sure where to start to try to sort it all out. If I start the engine in service mode then switch it back to run the engine stops straight away. If I try to start in run mode I get the FOA and the glow plug light - which I thought should go off after about 10 seconds but doesn't. Also, it seems the oil pressure warning light isn't working - it lights up when the eic does it's power up but doesn't light up when the ignition is turned on. I changed the sender but still the same. Does the eic detect if the engine is running before activating the oil light? I disconnected the yellow oil pressure wire with the ignition on, but engine not running and also tried shorting it to ground but no oil light. I can use the machine in service mode but each time I get in I have to flick the switch back to run then to service. I'd like to at least have the engine warning light working just in case. I have the LS160 service manual and it talks about a diagnostics and setup mode for the eic. It says you can reset the hour meter. Is this diagnostics and setup mode the same for the LX565?
The oil pressure light is on a time delay and will not come on by just turning the key switch on. I do not know exactly what the eic is looking for before the oil light comes on but I know just turning the key on will not do it.
As long as you have an early LS160 service manual the diagnostics and setup are the same. The last LS160's used a different panel but I do not think the later one is shown in the service manual.
The wiring diagrams should also be the same.
The wiring diagram is where you need to start. Remove the headliner and right side panel by the service run switch and check if the wiring to the service/run switch is correct.
You have not said if the eic lights come on when you sit in the seat with the
KEY OFF and the service\run switch in the
RUN position.
To check if the seat switch and seat belt switch are operating you can unplug the seat harness at the back of the seat. You will find three terminals in the connector. With someone in the seat with the seat belt fastened you should have continuity between all three termanals of the seat harness.
Check the machine end of the connector you disconnected from the seat harness, and you should have power to one terminal at all times reguardless of operator present or key switch position.
Start with that and let us know what you find, then we will go to step 2.