Ignition With Ballast Resistor Wiring Diagram

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.

Ignition with ballast resistor wiring diagram. Resistor wire for models. Ohmmeter test procedure resistor wire disconnect 20 gauge purple red resistor wire from ignition coil positive terminal. The job of the ballast resistor was to inhibit current to a level that would not overheat the coil. We ll check on this.

Connect ohmmeter between purple red wire at coil and purple wire at alternator. 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. From the other terminal on the resistor a wire goes to the positive on the coil. 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.

The purpose of an ignition ballast resistor between the ignition switch 12v and the ignition coil positive terminal is to restrict current flow. 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. 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. Set the ballast resistor up to the firewall and screw the clamps in place.

How to install a pertronix ignitor ignition system classic car episode 280 autorestomod duration. Autorestomod manic mechanic gasoline media 214 019 views 17 19. This simple system is easy for even the novice mechanic to wire. Strip the end of the positive wire from the ignition and connect it to the positive end of the resistor.

Pat conners wrote that wires 2 and 3 should go where 4 and 5 are and vice versa. 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. As a matter of fact a bad diode trio in a conventional alternator can do the same damage. Connect wires to positive.

The following diagram shows the 5 pin box with dual ballast resistor. Disconnect purple lead at back of alternator.