02-08-19, 02:17 PM
Ruled a few of my possibilities out:
Break between kill switch and ignition coils
Starter cut-out relay (and diodes) are further back on frame than coils, break inside the main harness that cuts the coils off without also severing the starter relay further back is highly unlikely.
Break in wire from ignition to diode box
Fault in diode box
I tried starting the engine in gear with the clutch held in this morning, engine span, but didn't fire, which would require the ground returning from the clutch lever to the starter cut-out relay via the same wire used to ground the wire from SS- via the ignition switch, if I've understood the diagram properly.
Fault in crank sensor
Wiring to crank sensor looks good, and resistance is in spec. I'm assuming this is a hardy component and not prone to developing intermittent faults.
Leaving me with:
- Break in any ECU wires (power, grounds and crank sensor really)
- Break in wire from SS- to ignition
- Fault in immobiliser/alarm
- Fault in ECU
Break between kill switch and ignition coils
Starter cut-out relay (and diodes) are further back on frame than coils, break inside the main harness that cuts the coils off without also severing the starter relay further back is highly unlikely.
Break in wire from ignition to diode box
Fault in diode box
I tried starting the engine in gear with the clutch held in this morning, engine span, but didn't fire, which would require the ground returning from the clutch lever to the starter cut-out relay via the same wire used to ground the wire from SS- via the ignition switch, if I've understood the diagram properly.
Fault in crank sensor
Wiring to crank sensor looks good, and resistance is in spec. I'm assuming this is a hardy component and not prone to developing intermittent faults.
Leaving me with:
- Break in any ECU wires (power, grounds and crank sensor really)
- Break in wire from SS- to ignition
- Fault in immobiliser/alarm
- Fault in ECU