Project.....? I need a nickname!
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Cross-Country
Joined: Nov 2010
Posts: 80
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From: South Jersey
I'm sorry i thought i threw the word "like" in there, my bad. But yes the engine stops running when i let go of the key. If i hold the key it will keep running but grinds the starter, I only did that briefly to experiment. And yes I have a test light.
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Joined: Nov 2007
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From: Denver Metro Area, CO
First, let me ask... your starter solenoid has two fat cables (one to battery, one to starter) and how many small wires connected to protruding-screw terminals? One or two? I hope one.
I don't know what wire(s) burned up and what you replaced, but we need to do some checking of things.
This system provides full battery voltage to the coil in START and drops it to around half that while in RUN. Sounds to me like the START stuff is working, but not in RUN.
See if you have power at the ignition module (on the driver's side wheel cover). Battery voltage to the red wire in RUN and to the white wire in START.
I'm betting you have voltage in the white at start (the engine starts
) but let's see what happens in RUN.If you have power to the ignition module in RUN, then go see if you have power to the coil + terminal in RUN (you should have battery voltage here in START).
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Joined: Nov 2007
Posts: 22,415
Likes: 92
From: Denver Metro Area, CO
I just read back some to try and figure out what wire he's talking about.
Seems he has an MSD ignition ignition with a wire from the box to the starter solenoid.
I don't know squat about an MSD thinger, but I'm going to assume it's a plug-in replacement for the DS2 stuff.
Seems he has an MSD ignition ignition with a wire from the box to the starter solenoid.
I don't know squat about an MSD thinger, but I'm going to assume it's a plug-in replacement for the DS2 stuff.
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Joined: Nov 2009
Posts: 4,575
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From: Broken Arrow , OK
Kind of sorta Chris. The box has to be powered to a constant 12 volts and then full time grounded as well. The box then supplies the power and ground to the coil and the factory wires providing that are no longer needed. Of course the box is wired into the dizzy and there should have been a wire with a square connector that has a 1/4" spade terminal hiding in it from the factory grouped in the harness that had the coil connections as well as the oil pressure and water temp gauge wiring that will supply a key on 12 volts to the box so that it comes on when the key is put into the run position.
Last edited by ctubutis; Jan 30, 2012 at 08:58 PM. Reason: Fixed spelling of spade (at least, that's what I think it's supposed to be)
Thread Starter
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Cross-Country
Joined: Nov 2010
Posts: 80
Likes: 0
From: South Jersey
I have two smaller ones, the one wire was the one that burnt up and i replaced the whole wire.....the other smaller one has a wire with a rubber boot that plugs into it.......and yes the MSD box was spliced into where the DSII would be. I found so looseish connections and fixed them but to no avail. The truck refuses to stay running, i will go ahead and try some of your suggested tests tomorrow. You guys are great btw! Very thankful.
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Joined: Nov 2007
Posts: 22,415
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From: Denver Metro Area, CO
The "old" factory way of using two small wires on the solenoid:
Red/blue-stripe - connected to S terminal, provides battery voltage to solenoid when key is in START, activates the solenoid and sends power to the starter motor. You will always have this wire, the other end is at the ignition switch (with possibly a NSS (Neutral Safety Switch) or clutch switch in between).
I forget the color of the other wire, but it goes on the I terminal on the solenoid. When the solenoid has been activated (by the red/blue wire described above), the solenoid sends battery voltage to that wire, the other end leads to the coil positive. This gives the coil full battery voltage in START. Ford later moved that function to elsewhere in the wiring.
I have no idea what MSD does; other guys here might, and/or they may have a Tech Support section on their Web site.
Thanks for chiming in, Bruno.
Red/blue-stripe - connected to S terminal, provides battery voltage to solenoid when key is in START, activates the solenoid and sends power to the starter motor. You will always have this wire, the other end is at the ignition switch (with possibly a NSS (Neutral Safety Switch) or clutch switch in between).
I forget the color of the other wire, but it goes on the I terminal on the solenoid. When the solenoid has been activated (by the red/blue wire described above), the solenoid sends battery voltage to that wire, the other end leads to the coil positive. This gives the coil full battery voltage in START. Ford later moved that function to elsewhere in the wiring.
I have no idea what MSD does; other guys here might, and/or they may have a Tech Support section on their Web site.
Thanks for chiming in, Bruno.
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Postmaster
Joined: Nov 2009
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From: Broken Arrow , OK
Today at 08:58 PM. Reason: Fixed spelling of spade (at least, that's what I think it's supposed to be)
Moderator
Joined: Nov 2007
Posts: 22,415
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From: Denver Metro Area, CO
BTW Bruno, nice pix you've been posting.
Moderator
Joined: Nov 2007
Posts: 22,415
Likes: 92
From: Denver Metro Area, CO
Postmaster
Joined: Nov 2009
Posts: 4,575
Likes: 5
From: Broken Arrow , OK
BTW Bruno, nice pix you've been posting.