When installing a remote starter in a vehicle with a blade type ignition cylinder switch, what order of circuit activation must be followed to successfully start and run the vehicle?

The correct order of circuit activation when installing a remote starter in a vehicle with a blade type ignition cylinder switch is ACC, then IGN, then START, and then IGN. This sequence is necessary to properly engage the vehicle's ignition system.

Starting with the ACC (accessory) circuit allows the vehicle's electrical systems, like the radio and power windows, to activate without engaging the engine. This step is crucial because it prepares the vehicle's electrical components and allows for smooth transitions in the ignition process without risking any damage or overload.

Next, activating the IGN (ignition) circuit prepares the ignition system to start the engine. At this point, the necessary electrical systems that require power for the engine to function are engaged, such as the fuel pump and ignition coils.

Finally, the START circuit is activated to crank the engine, but it's essential to ensure that both the ACC and IGN circuits are already engaged. This order ensures that when the engine starts, all components are ready and that there is no delay or interruption in power, which could cause a hard start or electrical issues.

Understanding this sequence reflects an important consideration in vehicle electronics and reinforces the principles of how ignition systems operate, contributing to effective, safe installations of remote starters.