Question: 1970 ford f100. did i wire this ignition bypass correctly?

(Posted by: jfcruzr on 2012-02-07 12:35:38)

This is an old 1970 ford pick- up. My key no longer works in the ignition so I installed a "toggle- switch/ push- button " bypass system. I'm not sure I wired it correctly and hope someone can let me know if there is a problem with this method... (a) OLD IGNITION: Removed from dash and unplugged the conglomerate of six wires that snapped into the back of ignition. Those wires are just hanging from the dash now. I did nothing to them, just disconnected from ignition. (b) TOGGLE SWITCH: mounted on dash and ran two wires from the Toggle Switch to the Voltage Regulator: 1 wire is connected to the (+) side of Voltage Regulator and 2nd wire is connected to the nearest terminal, in front of the Voltage Regulator. Does it matter which wire is connected to the right/ left side of Toggle Switch? (c) PUSH BUTTON: Mounted to dash with two wires connected as follows: wire1: attached to the starter solenoid. and wire 2 is connected to the negative terminal of the battery. Again, not sure if the wires need to be connected to a specific side of the Push Button. Thank you!

Posted by: ClassicMustang on 2012-02-07, 14:39:41

Those ignitions were equipped with a ballast resistor to feed 8 volts to the coil. and 12 volt bypass for starting, it supplied 12 volts to the coil when the solenoid was activated only.. otherwise it might be hard to start. you can put a extra switch in to supply the coil upon start up. If it turns over, you have the solenoid correct, if not use the other small terminal to actiavate it. it's usually the 1st one from the battery side. The second small terminal supplies 12 volts will cranking and can be used to fire the coil during start up only. If it starts and stay running, your good... if not, you need to run a wire from the toggle to the ballast, which supplies the coil. Your truck may use a resistor wire instead, but you can use either. If you run 12 volts to the coil, the points won't last very long... you could add a Pertronics kit in place of the points, then you wouldn't have to worry about it. I would recommend getting a universal ignition and wire it in just like the old one. direction in a toggle doesn't matter. Here is a wiring diagram that may help.

Posted by: R C on 2012-02-07, 12:57:59

Hell No!!!!! (b) TOGGLE SWITCH: Positive battery to positive connection on coil. (c) PUSH BUTTON: Positive battery to "S " terminal on starter relay.