Richard, thanks for the relay info, though wonder if there might be any advantage to using a relay with a diode across the contacts to perhaps extend it`s lifespan...? Similar thinking might be applied to the starter motor relay...thinking the effects of back EMF from an inductive load..?
You raise an interesting issue with your post George. Clearly the relatively low current cube shaped starter relay, matching others on the car, should have diode protection for ECU and associated electronics. What of the piggy back starter solenoid though? This has two coils each much larger than the relay mentioned above with consequently greater back emf spikes but no diode protection. Video below explains the need for the two coils.
AI answer suggests that circuit design mitigates these spikes but how I wonder
Richard
2018 Roadster 3.7 1966 Land Rover S2a 88 2024 Royal Enfield Guerrilla 450 1945 Guzzi Airone
