Ignition With Ballast Resistor Wiring Diagram

The typical automotive ignition system prior to 1974 consisted of a coil and ballast resistor with breaker points to interrupt the current flow when a spark was needed.

Ignition with ballast resistor wiring diagram. Pat conners wrote that wires 2 and 3 should go where 4 and 5 are and vice versa. Here is a picture gallery about ignition coil ballast resistor wiring diagram complete with the description of the image please find the image you need. Meter low ohms scale should read. The following diagram shows the 5 pin box with dual ballast resistor.

In the years when engines were a lot easier to work with a ballast resistor was used in order to prolong the life of the coil. Ohmmeter test procedure resistor wire disconnect 20 gauge purple red resistor wire from ignition coil positive terminal. The purpose of an ignition ballast resistor between the ignition switch 12v and the ignition coil positive terminal is to restrict current flow. Connect wires to positive.

From the other terminal on the resistor a wire goes to the positive on the coil. Set the ballast resistor up to the firewall and screw the clamps in place. Autorestomod manic mechanic gasoline media 214 019 views 17 19. Some brands utilized a resistor in the coil or a resistor wire hidden in the wiring from the ignition switch but mopar put their resistor or ballast resistor on the firewall or inner fender.

Disconnect purple lead at back of alternator. Start is only hot 12v dc during cranking and run is hot 12v dc from the moment you turn the key on through crank and after crank. Strip the end of the positive wire from the ignition and connect it to the positive end of the resistor. This simple system is easy for even the novice mechanic to wire.

We ll check on this. The job of the ballast resistor was to inhibit current to a level that would not overheat the coil. Ignition coil ballast resistor wiring diagram with ignition coil ballast resistor wiring diagram image size 609 x 360 px and to view image details please click the image. As a matter of fact a bad diode trio in a conventional alternator can do the same damage.

All special tools required. Connect ohmmeter between purple red wire at coil and purple wire at alternator.