So today I went to my local U-PICK-IT yard, and I got a complete harness from an 81 F150.

I can now start the DSII conversion on my 84, and remove the TFI.

To date, I have collected the following items:

-Complete harness
-DSII coil and bracket
-Vacuum advance Dizzy
-"DURASPARK" module with blue relief

I do have a question: When wiring up the new system, what wire colors do I pay attention to? The color of the wires coming out of the duraspark module, or the wiring harness wire colors.

For example, on the harness I just picked up, the red and white wire plug from the ignition, when plugged into the red and white wire plug on the duraspark module, cross to the pther color, so the red harness wire is conneced to the white module wire.

I'm thinking I should just go by the module wire colors.

What do you guys think?

 

Here is the way its wired (Ignition Module wire color to Harness wire color):
White to Red/Light Blue
Red to White/Light Blue hash
Orange to Orange/Yellow hash
Pink to Pink/Light Blue hash
Black/Light Green to Black/Light Green dots
Dark Green to Dark Green/Yellow dots
So it should be "plug'n'play". OBTW, some aftermarket modules had different wire colors but the connectors matched correctly.

 

So it sounds like the red to white, and white to red is OK. Strange.

Now I just have to figure out how to wire into the ignition and install the ballast resistor.

 

Ballast resistor (1.1 Ohm resistance wire) should already be in the original harness. With Ignition Switch "Off", disconnect the Ignition module connector and the Red/Light Green wire to coil "Batt" (+) terminal. Measure resistance between harness White/Light Blue hash and Red/Light Green wires. Should be about 1.2 +/- 0.4 Ohms.

 

My truck is an 84, and I am removing the TFI to install the DSII.

Are you telling me that the ballast resister is still in the harness somewhere (I believe I read on one of these posts that it is about 4-8" from the actual ignition switch [key] in the column???!?!?

 

I just did the exact same thing and had the worst of luck along the way, bad connectors, intermittently bad components, you name it. I think I can still say what colors are what without looking them up, I even had to rip apart my rebuilt harness twice. The guys here all walked me through it, and after a week, it ran again. This is a really easy job, I can't imagine anyone having as many problems as I did. Anyway, I'll keep watching and jump in if you need help.

Oh yeah, what motor? Doesn't really matter, just curious.

 

its the, 4.9 I6

 

Sweet, same one as me. I ended up getting ALL new components. The only thing I ended up using was the harness and the distibutor. My plug that plugs into the distributor was bad with the harness I got and it was a nitemare to find. I also deleted 2 wires from the harness, oil pressure sending unit wire, and temp sending unit wire, as I have aftermarket gauges. Good luck, if all goes well this will be an EASY afternoon project. Unfortunately for me, my mileage did not improve. But at least now I have a fighting chance at getting it right, with the feed back carb gone and a vac advance dist. Keep us posted!

PS Which coil are you gonna run?

 

Yes, it's physically in the existing harness and colored Red/Light Green just like the wire to the coil. Unless, of course, somebody has removed it. Like I said before, you can check it with an Ohmmeter. Or, you can go ahead and hook everything up and start the engine -then check the voltage on the Red/Light Green wire at the coil. Should measure 6 to 8 Volts if I remember correctly. Note: The ballast resistance is bypassed in "Start" in order to supply maximum voltage while cranking.

 

Did the DS2 to my 84 F150 with 300 I6.Totally plug and play.Time to install and start engine,including computer and computer wiring harness removal was appx 25 minutes
Leo

 

I'm glad you guys have had great results.

I will be removing the TFI squarish looking coil, and installing the correct coil for the DSII project, which I understand is a little hotter then the TFI coil.

I also appreciate all the replied. On the left fender well in the engine compartment, there are 3 plugs, which are currently used for the TFI system. I am assuming I will be able to find the red and white wires somewhere in there for the ignition wires for the module, unless they are tucked away somewhere else.

What are you guys using for carbs? I still have the feedback carb, and I need to start shopping for another one.

 

I'm pretty sure the power wires and connectors for the ignition modules are the same. Your DS II harness should have the others.

 

I am using a carb I picked up at a salvage yard for 25 bucks, I also picked up a spare somewhere along the way.

 

All of the plugins that you need to hook up the DS2 are in the wiring harness for the truck.All of the computer crap is a stand alone harness for the carb and such.Like I said.Its ALL plug and play.
Leo

 

Piffery1,

I just went out to the truck with the new DSII module and compared my wires to your notes, and your right on!!!!! NICE!!!

I found that the red wire form the module will match up with the white/blue hash mark wire. And the white wire from the module will match up with the blue/red wire.

On the firewall side of the truck harness, there is a 3rd white wire, but nothing matched up to it on with the new module.

Does this sound right.

Also, as far as the vacuum advance, where did you plug yours in on the carb? the only carb port I can find (feedback carb) is on the bottom right side. The port has no vacuum at idle, and a little vacuum at high RPM's, while in park. I kind of thought the vacuum advance distributor would need a little more vacuum then what the port was providing, however maybe with the engine under load, it provides more.

either way, I'm looking for a mid 70's YF to throw in there.