This is for BILL. An FCC person can use it too.
I'm making a couple of assumptions based on previous 12v GM points ignition systems wiring, but I have no specific experience with 55.2 Chevy truck wiring. If I'm wrong, please correct me.
Assumption 1 is that the IGN 1 (run) terminal on the ignition switch does not have an internal to the switch connection to IGN 2 (start) on the switch. Most GM switches do not. Correct
Assumption 2 is that the side terminal on the stomp switch connects to the battery cable terminal of the switch when the switch is activated. Yes. BUT this diagram does not show a stomp switch that I can tell.
Assumption 3 is that your truck is a 3600, 4000 or 6000 series truck as that is what the wiring diagram is for. Wiring diagram has been "doctored", should say 3000 4000 6000
I read the wiring diagram this way:
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As drawn, a 20 ga violet wire (marked "resistor bypass") runs from the stomp switch (should be the side terminal, doesn't say) to the IGN 2 terminal (marked "start") on the ignition switch. This wire has no other connections. As drawn, that wire would do no useful work. NO. The VIO wire runs from IGN Start to the starter solenoid to activate it. I do not see an indication of foot start/side terminal shown. The words "Resistor (by pass)" don't mean what they say. I don't know what they meant. My advise is to ignore that. The diagram shows early solenoid with no "R" terminal. The bypass is done by the Ignition Switch.
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As drawn, a 20 ga dark green wire runs from the ign1 terminal on the ignition switch (this should be the "run" position on the switch, but is not marked) to coil+ WITHOUT GOING THROUGH ANY
RESISTOR. I believe it should go through a "ballast resistor", reducing available current and voltage available to the coil. NO. The wire shown is from IGN 2 and is "spliced" to coil and to ballast output side. IGN 2 and Start/Sol are tied together inside switch.
Brown is from ACC which is the same as IGN 1 which are both tied together internally as "IGN ON"..... AND IGN 1 and ACC are the same long terminal. VIEW A is poorly drawn. When switch is held at start position GRN/IGN 2 goes direct to coil. When start is released IGN 2 is dead and ballast is now powering coil.
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As drawn, a 20 ga brown wire runs from an ACCessory terminal of the ignition switch to what may be a "ballast resistor". The other side of this resistor connects to coil+.
IF the ignition switch has a separate ACCessory position (Truckolet implies it doesn't, but I'm not sure), that would allow starting the truck with the stomp starter when the key was in the ACC position. I really doubt this is how this circuit should be wired.
As drawn, when the key is turned to the "run" position the ACC terminal would be providing 12v through the 20 ga brown wire to one side of the "ballast resistor". The resistor could be used to provide reduced voltage and current through the resistor EXCEPT FOR THE FACT that the other side of the resistor is already connected to 12v via the 20 ga dark green wire coming from the IGN 1 terminal on the ignition switch. This renders the ballast resistor useless AS DRAWN. I ageree it looks like GRN is on IGN 1. It's not. Bad drafting and bad draftsman's location of terminal numbers. This is how the early switches were built. As I've said you have to wire newer switches to operate as needed. This switch is known as a 55-56 switch..
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Questions:
Was a key-start (ie. with a solenoid on the starter motor) offered as an option on six cylinder 55.2 Chevy trucks? Maybe with Hydra-Matic transmissions? I think I answered in a previous post.
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Conclusions:
If the ignition switch does have a "start" position it should:
a. have a wire that runs from IGN 1 to one side of the ballast resistor
b. have a wire that runs from the other side of the ballast resistor to coil +
c. have a wire that runs from IGN 2 to coil +
If the ignition switch does NOT have a "start" position it should:
a. have a wire that runs from IGN 1 to one side of the ballast resistor
b. have a wire that runs from the other side of the ballast resistor to coil +
c. have a wire that runs from the side terminal on the stomp switch to coil +
