1973 F250 Engine Wiring Diagram

Need wiring ignition switch connection DETAILS for 73 (11/72) Ford F100?

Ricque

28.05.2017

Wire colors are Yellow, Black, Red w/Blue stripe, Pink, & two (2) Red
w/Green stripe (on one terminal).

I haven't found anything for these combination of wire color on the web. I
need to know where to connect each of these wires… Correctly.

I have a ballast, an ignition module, starter solenoid, distributor and coil to
connect this specific combination of wires colors to, with this 6 pin switch
(only 5 are connected because two red w/green stripe wires are on one
pin/terminal)

Maria
28.05.2017

Hdbrb

YesNoMaybe
28.05.2017

Not sure exactly what connections you need to make, but I can give you function that each wire color serves at the switch. I'm assuming that these wires are already on the switch and you are having to splice them in to the harness or repair melted wiring. If it's melted, Ron Francis wiring or Painless Wiring have harnesses for these trucks. Anyway Ford used the same color designations for wire function through the 87 model trucks. I hope this helps you as I know how hard it can be to trace wiring in a taped up harness. Just be aware that colors are often changed at connectors or other colors are added to them making it even more confusing. I don't know what ignition module your talking about, unless it's the early duraspark, which uses only two connections to the module itself. The distributor has only 2 wires. One to the coil, on the opposite side from pink or red w/green stripe and one to ground. The capacitor goes to the coil side and is there to eliminate noise in the radio. For a duraspark system one connection is ignition power (12volts from ignition-RED) and one is spliced to the starting wire(RED w/blue stripe) and is white at the module connector. It triggers a 10 degree timing retard for starting. There's also a ground to the module, but it comes from the distributor. It is black. Anyway.
Try this-
Red w/blue stripe--starting solenoid S terminal
Yellow is from battery power fusible link wire from starter solenoid battery wire
Pink goes to the I terminal on starter solenoid and one side of ballast resistor-so you have 12 volts while cranking the engine
Red w/green stripe goes to + side of coil
Red w/green stripe also goes to ballast resistor, and other components that use ignition on power while operating.
Black goes to ground.
The pink wire should join the red w/green stripe in wiring harness. That's so the coil gets 12 volts while cranking, but around 6-8 volts running to keep from frying the points.
If you are still confused go to rock auto and see if they have a factory wiring schematic for that truck. If you're adding a duraspark II system, which is easy to do, there are wiring diagrams on the web. I read through this about 5 times to try and make it make sense. Hope this helps.

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Source: https://fordnews.org/need-wiring-ignition-switch-connection-details-for-73.html