1988 Dodge B250 - Page 5 - Answered Questions & Fixed issues
Port for obd1 on a dodge ram roadtrek where can I find it
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Dodge Cars &...
on Jun 28, 2020
1986 dodge ram d 50 , does anyone have the answer to where the wires go to the coil and resistor in the right order or a photo ? It's a four cylinder
The wiring of an ignition coil is fairly straightforward as there is only two terminals and regardless of whether there is an electronic distributor or the old fashioned contact breakers, in the basic 12 volt ignition system the wire from the ignition switch is connected to the + or Batt terminal of the coil and the single wire from the distributor connected to the - or CB terminal.
That system became quite rare over time as the ballasted system performed much better for little more cost. The primary resistance of the 12 volt coil is around 3 ohms and the ballast type around 1.5 ohms. It is important the correct coil is used.
You mentioned resistor so it is reasonable to assume it is a ballasted system. In this system one of three types of resistor is used - while many used a length of resistance wire integrated into the wiring harness the AC Delco system used a carbon "pill" type resistor mounted directly on the + coil terminal.
The third type is probably the best and is a ceramic unit with resistance wire inside, usually bracketed on the coil bracket or nearby.
The ballasted system uses a low resistance coil. One end of the resistor is supplied from the ignition switch and the other end is connected to the coil + terminal. There is a third wire directly from the starter solenoid also connected to the + terminal so when the ignition key is turned to crank the engine, battery voltage is supplied to the coil bypassing the resistor and producing a much more powerful spark making starting easier.
By 1986 many vehicles had begun to use either integrated distributors (with the amplifier inside) or a discrete amplifier mounted near the coil. The connections to these is fairly intuitive as multiway connectors take care of most of the wiring though the coil wiring remained basically the same on the + side.
Dodge Cars &...
on Jun 23, 2020
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