Duraspark II Wiring Question.

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Aug 26, 2008 | 05:53 PM

Woodsman_30350

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From: Comfort, TX

Duraspark II Wiring Question.

The fluids are in my F-1 (351W/C4 Combo) and all the wiring is connected and verified except the connection from the coil to the ignition switch. I have researched until I am blue in face and since I am not using an existing harness, I am confused. Here are my issues:

1. From the Duraspark Ign. Module there is a 2 wire plug with a red and white wires. As for the white wire, the common answer I am seeing is that it goes to the "S" terminal on the starter relay. A wire then goes from the same "S" terminal back to the starter terminal "S" on the ignition switch. Is this correct and are these separate wire runs?

2. The red wire from the same module connector gets me confused. I have seen diagrams where it goes to the "Ign" terminal on the ignition switch. These same diagrams show the red/green wire from the coil going to the same terminal but running through a ballast resistor. Finally, to totally confuse me, where does the wire from the "I" terminal on the starter relay go? On the diagram it looks like it goes through the same resistor wire. Or, does it run directly to the Ign. terminal on the ignition switch like the other two wires?

So, who's on first?

Aug 26, 2008 | 06:41 PM

subford

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From: Easton,Ks

Maybe this will help, this is my 1983 F150 wiring.
If you have anymore questions or this did not cover everything just post back and I will address the question.
Good Luck

/
Bill K

Aug 26, 2008 | 07:11 PM

subford

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From: Easton,Ks

Another diagram:

Aug 26, 2008 | 07:38 PM

Franklin2

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From: Virginia

Quote:

1. From the Duraspark Ign. Module there is a 2 wire plug with a red and white wires. As for the white wire, the common answer I am seeing is that it goes to the "S" terminal on the starter relay. A wire then goes from the same "S" terminal back to the starter terminal "S" on the ignition switch. Is this correct and are these separate wire runs?

That is correct. You can run the wire however it physically suits the situation, and the way you would like to run the wiring. You can run two wires off the ignition switch and run one to the module and the other to the solenoid, or you can run one wire from the switch to the solenoid, and then hook another wire to the solenoid and run it over to the module. Or you can splice the other wire in. However you want to hook these 3 points together.

Quote:

2. The red wire from the same module connector gets me confused. I have seen diagrams where it goes to the "Ign" terminal on the ignition switch. These same diagrams show the red/green wire from the coil going to the same terminal but running through a ballast resistor. Finally, to totally confuse me, where does the wire from the "I" terminal on the starter relay go? On the diagram it looks like it goes through the same resistor wire. Or, does it run directly to the Ign. terminal on the ignition switch like the other two wires?

It breaks down like this; The red wire on the module gets 12 volt anytime the ignition switch is in start or run. So it's hooked directly to the ignition switch.

The coil does not get 12 volts all the time. The coil gets a reduced voltage from the resistor anytime the key is in start or run. The coil does get 12 volts during cranking. That is why you are seeing other wires running from the "I" terminal or from the factory ignition switch. When the solenoid is making the starter turn, it is also putting 12 volts on the "I" terminal. This terminal is hooked directly to the coil. When the solenoid is not cranking the starter, then the coil is getting it's voltage from the resistor.

Aug 26, 2008 | 08:21 PM

Woodsman_30350

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From: Comfort, TX

Thanks guys. One question I have concerns the ignition switch. My switch has 4 terminals. Center is "S", and the three perimeter terminals are labeled "Ign", "Acc" and "Bat". The two diagrams show battery and two "S" and one "R" which I assume is the "Ign" terminal. So, how does that relate to the second diagram.

http://i54.photobucket.com/albums/g9...parkwiring.gif

Aug 26, 2008 | 08:32 PM

subford

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From: Easton,Ks

Ok here is a diagram for a 1977 F-series truck, it seems to have more of what you want as to the number of poles on the Ign. Sw.
Do not worry about the lamp checks on the right.
Or the Cluster Voltage Regulator on the left.

Aug 26, 2008 | 08:41 PM

fmc400

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From: Austin, TX

The diagrams aren't meant to imply that the ignition switch literally has 2 'S' terminals and an 'R' terminal. It's just meant to show what circuits are hot when the key is in start, and what circuits are hot when the key is in run. The BATT terminal on your switch goes to the battery which is hot at all times. Based on the position of the key, it connects power to one of the three circuits - accessory power when in ACC, hot-in-run circuits when in IGN, and hot-in-start circuits when in S.