Ignition Switch Diagnosis

Howdy. So, I have no power to the starter solenoid when the key is turned to the start position. In fact, there is absolutely nothing when the key is in the on position (no lights at all - as if the battery is completely dead). But the battery is good and I can start the car by jumping the solenoid. Is there a way to determine whether it is the ignition switch? Any other suggestions? This is a 1970 fixed column convertible.

I had similar issue, was the starter solenoid

Solenoid is good. Jumping from the battery to the “s” terminal will start the car. I think I have to verify that power is getting TO the ignition switch. Any suggestions on how to do that?

Those 1970 ignition switches are fragile and prone to mechanical failure. Good used is about the only thing available.

Thanks Scott. Do you know the Ford part number?

Don’t forget that the switch itself is adjustable on the lower column. Could be the adjustment is not allowing the switch plunger to reach the start position. Try loosening up the switch and sliding it up towards the steering wheel. A little bit at a time.

Another question, has the column been apart, notably the bronze actuator gear under the ignition cylinder? The gear must be precisely clocked in the column shroud to allow proper actuation of the link rod and switch.

if ignition switch is shot you can buy a 70 mustang switch through auto part store. it comes without the long cougar harness and plug but you just splice in the cougar longer harness. p lus check all in prior post these switches are very fragile and gear mechanism is from the late jurassic period proceeding tyranosaurus rex it needs good lubrication. loosen nuts holding column and you will find switch just under instrument attached with 2 nuts, there should be enough access to adjust switch if not remove nuts to drop. a tilt column is much harder job dont ask how i know

Thanks for all the suggestions. I was able to determine that the problem was not the switch. Turns out there was no power getting to the switch. Traced it to a bad wire connector. Replaced the connector and presto, we have liftoff!