@Richard. I’ve swapped all engine components one by one as far as possible. Including the whole throttle housing with all components from the good car to the bad car. No results. With contact switch I mean turning the key at the steering wheel in on position. With alarm lights I mean when both turn signals starts blinking together. Perhaps hazard warning light is more correct. About the fuses see above to RogG
@All. Just back from a new test ride. 15 km. normal idling when coasting. Next 5 km. intermittently high idling. Disconnect speed sensor at front wheel from that moment on normal idling all the time without speed indication. Connect speed sensor again, next 10km. normal idling. Suddenly out of the blue high idling again. You can feel this high idling is back as the reaction from the engine specially when going downhill. Now all lights working normal again. 😳 Switch hazard lights still turns on the fuel pump. 😱
Thanks for confirmation Laurens. Will just comment on the fuel pump issue for the moment. Normally this is fed by the engine relay feeding to fuse 12 then via the inertia switch to fuel pump. The coil for this relay is fed directly from ignition switch with a ground signal directly from ECU to trigger relay and so energise pump. When this happens power is also supplied from relay to fuse 5 (ECU) and fuse 6 (immobiliser). The only possibility I can see for pump to run with ignition switch off is for a permanently live back feed through one or other fuse. I think we can discount the ECU which leaves immobiliser. When you have pump running with hazard switch on but ignition off, try removing fuse 6 ahd see if it stops.
How the hazard switch itself back feeds is still a mystery but one step at a time. One point I did notice on the pre-2014 wiring diagram, which I believe covers both your cars, is that diodes have been inserted in the left and right indicator circuit's between bomb tails and panel switch. Guessing this is to maintain isolation of each indicator side when hazards are off. The two diodes inserted in green/white and green/red cables should be seen close to panel connector concerned with switches, but did wonder if their shrink wrap covering has worn through allowing a short!
Richard
2018 Roadster 3.7 1966 Land Rover S2a 88 2024 Royal Enfield Guerrilla 450 1945 Guzzi Airone
