ignition switch

[Challenger RTA]

The two explanations below are for the start and run. They are pretty much the same but just a little different. Once you know one you know the other. Just a resistor in the circuit or not. Or the key in the on position for run or holding the key in the start position when testing.

 

[Challenger RTA]

When the key held in the start position (START) you should have battery voltage at the Brown wire at the coil. If not it is the wiring, bulkhead connector or at the molex connector. Turn the ign sw on check the BROWN wires on one sides. of the Molex connector. If you don't power the on both side no need to go any further. Back to the ing sw. If it's on one side it's the Molex.

Here again with the ing sw on.
If you have power at the molex move onto the engine compartment connector 22 Brown. If you don't have it there it's in between there and the molex.

If you have power in the engine compartment connector 22 and not at the coil brown wire. It's the connector or the wire to the coil, If there is power at he brown wire at he coil. It might be the coil. Disconnect the The brown wire from the coil to be sure about the coil.

The bulkhead connectors are known to be a problem.

 

[Challenger RTA]

When the key is in the on position (RUN) you should have battery voltage at the blue resistor wire. If not it is the wiring, bulkhead connector or at the molex connector. Turn the ign sw on check the DARK BLUE White trace wires on one sides. If you don't power the on both side of the molex connector, no need to go any further. Back to the ing sw. If it's on one side it's the Molex.

Here again with the ing sw on.
If you have power at the molex move onto the engine compartment connector 23 DBL white tracer. If you don't have it there it's in between there and the molex.

If you have power in the engine compartment connector 23 and not at the resistor connection. It's the connector or the wire.

If you have power at the feed or the resistor and not on the other side ( load side) it's the resistor.

There will be reduced voltage on the other side of the resistor (Load Side), that's what it dose.
The test light might not show it has power because it's lower power and completing the circuit. You might see a very dim light. Unplug the load side of the resistor wire is the best way.

If there is reduced power (9v all depend on the the battery state of charge) to the coil, It might be the coil.

The bulkhead connectors are known to be a problem.