1971 Dodge Truck Ballast Resistor Wiring

170 198 225 slant six. Fifth topic emisson control nox wiring 1970 1971 while under the hood working on the engine compartment wiring found an additional wire connector apparatus on the ballast resistor which had a single red wire coming into it from a small additional harness. The ballast resistor is commonly found in older vehicles because they did not have the benefit of circuit boards found in most of today s vehicles.

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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.

1971 dodge truck ballast resistor wiring. For additional how to tutorials visit our website. This video explains how the ballast resistor works. Kits are available for the following applications. Dodge truck suv and van forums.

Manual does not show this set up where there are. Most people carry a spare ballst resistor with them. 273 318 340 360 small block v8. A ignition ballast resistor b above windshield wiper motor pic57 1 dark blue wire with white stripe a ignition ballast resistor b above windshield wiper motor pic58 1 solid grey wire a oil gauge wire b oil pressure switch on back of engine pic59 1 solid dark green wire dark blue with white stripe a alternator regulator.

Fortunately mopar performance has made it easy to buy most of what you need in a complete kit. I would like a 4 pin dodge chrysler ignition ecu box from a 1983 pickup truck example dodge d 150 with 318 v8 and the 2 pin ballast resistor that goes with it. It has the csc ignition and a version with the old ballast resistor setup with the full 12v wire coming from start relay to the output side of relay. Cut a piece of wire long enough to reach from the other terminal of the ballast resistor to the bat or b terminal of the coil.

1972 1987 dodge ram trucks d w series 87 w150 w 360 ballast resistor issue. I would like a 5 pin dodge chrysler ignition ecu box from a 1975 pickup truck example dodge w 100 with 318 v8 and the 4 pin ballast resistor that goes with it. Vintage dodge truck forums. Connect the wire to the unused terminal of the ballast resistor and to the previously identified terminal of the coil.

Over time the ballast resistor can be damaged by normal wear and tear so there are a few things to look for when you suspect a bad or failing ballast resistor needs servicing. Corroded wiring connectors and solder joints will reduce voltage to the ignition circuitry resulting in hard starting and phantom problems. The ballast resistor is a high failure item. Strip 1 2 inch of insulation from each end of this wire and crimp a connector onto each end.