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Need help with ignition switch in 55 6V

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Old 09-25-2011, 10:56 AM
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Need help with ignition switch in 55 6V

I need help!! After narrowing down an electrical issue to what appears to be the ignition switch in our 55 F100 (still original 6V system), I went online and ordered an new one.

It seems all that is available is a universal switch that can be used for 53-56. Since 56 is 12V there is to be a 4th post on the new switch that the 55 switch does not have.

Does anyone know how to install this new switch on a push button 55 6v. The 3 posts on the 6V switch are marked GA, AM and COL. The 4 posts on the new switch are marked ACC, BAT, IGN and STR is the post in the middle. What goes to what??

I tried to attach pictures and the instructions I got but it won't let me attach files.
Thanks,
Deb
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Old 09-25-2011, 11:43 AM
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I don't have a wiring diagram handy for a '53-'56 truck, so I can't tell you at the moment what the terminals were for on your original switch. The new ones, however, are pretty easy. BAT is incoming power from the battery, IGN goes to the coil, ACC is for accessory and feeds your radio, wipers, etc., and STR is for the starter solenoid. You can either leave it push button start and ignore the terminal or delete the push button and tie the wire to the solenoid to STR for key switch start. Let me see if I can find a diagram that matches your old switch.
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Old 09-25-2011, 04:00 PM
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Quote:
Originally Posted by 55fordv8 View Post
I need help!! After narrowing down an electrical issue to what appears to be the ignition switch in our 55 F100 (still original 6V system), I went online and ordered an new one.

It seems all that is available is a universal switch that can be used for 53-56. Since 56 is 12V there is to be a 4th post on the new switch that the 55 switch does not have.

Does anyone know how to install this new switch on a push button 55 6v. The 3 posts on the 6V switch are marked GA, AM and COL. The 4 posts on the new switch are marked ACC, BAT, IGN and STR is the post in the middle. What goes to what??

I tried to attach pictures and the instructions I got but it won't let me attach files.
Thanks,
Deb
The three wires on your original switch were: GA (goes to your gauges), AM (goes to the Ammeter or -6vdc) and COL (goes to the Coil). If you want to leave the starter button in your truck, don't connect anythng to the STR on the new switch. BAT uses the original AM wire, ACC uses the original GA wire and IGN uses the original Coil wire.
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Old 09-26-2011, 02:20 AM
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do NOT connect the wire from your starter button to the "STR" starter terminal of the new switch. The starter button goes to ground from the solenoid to complete the circuit and crank the starter. That center terminal on the new switch is for the 4 terminal solenoids of '56 (?) and on and sends power TO the solenoid. connecting the starter button wire to this terminal will in essence put power to power and at best, nothing will happen. At worst, you'd get a nice sparks fireworks show and possibly toast your solenoid. Check to be sure your truck has a 3 terminal solenoid and not the newer 4 terminal one before you go connecting wires.
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Old 09-26-2011, 02:27 AM
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Quote:
Originally Posted by Jolly Roger Joe View Post
The three wires on your original switch were: GA (goes to your gauges), AM (goes to the Ammeter or -6vdc) and COL (goes to the Coil). If you want to leave the starter button in your truck, don't connect anythng to the STR on the new switch. BAT uses the original AM wire, ACC uses the original GA wire and IGN uses the original Coil wire.

The "AM" wire to or thru the ammeter actually brings power to the switch to energize the accessories (GA) and coil (COL)
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Old 09-26-2011, 04:34 AM
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1953/55 genuine Ford ignition switch.

FAA-11572-A .. Ignition Switch / Obsolete

Applications: 1953/55 all trucks except P Series Parcel Delivery.

JST AUTOMOTIVE in Lebanon TN has 1 = 615-443-3086.

KLIMESH MOTOR SALES in Calmar IA has 3 = 563-562-3241.

WESTLEY OBSOLETE PARTS in Liberty KY has 5 = 606-787-5293.

GREEN SALES CO. in Cincinnati OH has 7 = 800-543-4959.

ANTIQUE AUTO SUPPLY in Arlington TX has 9 = 817-275-2381.
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Old 09-26-2011, 08:42 AM
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Thanks for all the help everyone.

This is our first time owning a classic vehicle and we just want to make sure we do things right. This forum and all its great members have made these issues/fixes much easier to deal with.

Thanks again
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