I wonder if there is anyone here who can answer a few questions on the Testarossa (91) wiring? What are the items that are powered when the ignition is turned on that apply to running the motor? This would include any inter-ralational components. John
Is this a US version TR? Do you mean with the key "on" and the engine not actually running? If your answers to the above questions are both "yes", the only engine components that receive +12V power with the key "on" and the engine not running are the ignition ECU and the coils/power modules. Everything else (injection ECUs, fuel pumps, various heaters, etc.) gets +12V power only if the key is "on" and the engine is actually running, or if the key is in Pos III (i.e., starter motor cranking). Can you clarify your quest?
