Chart C-4C Ignition System Check

- Chart C-4C Ignition system Check (Remote Coil).:

- Wiring Diagram for Chart C-4C Ignition System Check (Remote Coil).:

- Connector Pin ID.:

CHART C-4C IGNITION SYSTEM CHECK (REMOTE COIL)

CHART DESCRIPTION
1. Checks for proper output from the ignition system. The spark tester requires a minimum of 25,000 volts to fire. This check can be used in case of an ignition miss because the system may provide enough voltage to run the engine but not enough to fire a spark plug under heavy load.
1a. If spark occurs with EST connector disconnected, pick-up coil output is too low for EST operation.
2. A spark indicates that the problem is a faulty distributor cap or rotor.
3. Normally, there should be battery voltage at the "+" terminal. Low voltage would indicate an open or high resistance circuit from the distributor to coil or ignition switch.
4. Checks for a shorted module or grounded circuit from the ignition coil to the module. The distributor module should be turned off so normal voltage should be about 12 volts. If the module is turned "ON", the voltage would be low but above 1 volt. This could cause the ignition coil to fail from excessive heat. With an open ignition coil primary winding, a small mount of voltage will leak through the module from the "Bat." to the tach. terminal.
5. Checks for an open module or circuit to it, 12 volts applied to the module "P" terminal should turn the module "ON" and the voltage should drop to about 7-9 volts.
6. This should turn off the module and cause a spark. If no spark occurs, the fault is most likely in the ignition coil because most module problems would have been found before this point in the procedure. A module tester could determine which is at fault.