I want to be be able to immobilize a vehicle. The use case is for theft prevention.
All along I have been thinking in terms of disabling the starter relay, as discussed here, Current from key to solenoid of starter motor relay , however a relatively high current carrying capacity is required which makes the control difficult.
What if I were to disable the fuel pump instead. Does anyone know what are the pros and cons of immobilizing the fuel pump versus the starter relay?