Bruce,
If you have not solved this I will help you if I can.
I am retired and have unlimited long distance.
If you wish call me at 509-932-0670 or email me at
allen@amichler.com
I have lot of experiance with electro-mechanical problems as I worked on IBM machines (not computers) when I was younger.
Also, if you are used to using a multimeter I would suggest this (I assume 6V + ground). Not knowing your expertise I apoligize in advance if some of what I am saying seems simple or like you do not know what you are doing. I will try to keep it simple and staright forward.
1. In the voltage measuring mode of your meter if your leads are long enough clip the positive lead to ground post wire on battery, or a good ground on the car. You can verify you have a good ground by touching the negative lead to the negative post on the battery and it should read 6V or whaterver voltage level your battery has in it.
2. Verify if possible that there is a black & red wire on one side of the ignition switch and a yellow & black wire on the othe side.
3. With ignition switch off verify that there is 6V on the yellow & black side of the ignition switch. Then check the other side with the black & red wire. If it reads zero (it should) turn the switch on and see if you now read 6V on the black & red wire side (it should). If you have 6V on the black & red wire start the engine. With the engine running and your meter lead on the black & red wire side of the ignition switch, turn the ignition switch off and see if it drops to zero or stays at 6V. If it drops to zero and the engine keeps running you have a wire misplaced somwhere as you already know.
4. If you have 6V on both sides of the ignition switch with it turned off, the ignition switch is shorted or there is a wire in the wrong place further downstream. If you have 6V on both sides of the ignition switch when in the off position remove the black & red wire and see if the wire still has 6V on it. If it does the problem is of course further downstream. If not check the post you removed the black & red wire from and if it has 6V on it then the switch is shorted and needs work.
Remove the Yellow & black wire from the other post and using the ohm meter function of your meter check the switch to verify it being shorted. Before checking you switch with the ohm meter remove the ground strap from the battery so yoiu do not risk frying your meter.
5. If it turns out the switch is OK go to the resistance unit (after reconnecting the ignition switch wires and the battery). There should be three wires on it. The black & red wire from the ignition swiitch , the black & green wire from the oil & fuel gauges and a red wire from the coil. With the ignition switch off check for 6V on the terminal posts of the resistance unit. If there is 6V on the reistance unit with the ignition switch off remove the the three wires from the resistance unit and see which wire has 6V on it. you should be able to trace the 6V back to its source.
If this does not make sense I an willing to help over the phone.
Have a good day !!!