Ahh, help - DSII problem?

[fordconvert]

The fan? THe engine fan? Mechanical or electrical? If its the mechanical engine fan sounds like you got something going on in your wiring, solenoid, or ignition switch.

 

[mysavioreigns]

Man, you guys missed a show....we were moving down the street Saturday, and the car wasn't working, so 7 friends and I pushed it down the road (although it only took like 2 people, lol). We got some hilarious stares.

I got a spare working coil, I'm gonna give that a shot tonight.

 

[Bort62]

Man, you guys missed a show....we were moving down the street Saturday, and the car wasn't working, so 7 friends and I pushed it down the road (although it only took like 2 people, lol). We got some hilarious stares.

I got a spare working coil, I'm gonna give that a shot tonight.

Did you Ghost Ride(tm) it?

 

[mysavioreigns]

Man have I been busy - first I had to move down the street (which involved pushing the car with some friends down the street ) and with a new job function commuting to DFW, I've had no time for the Mustang.

Problem is, I STILL am having this danged electrical problem.

Once again, I'll go over what's happened.
--------------------------------------------------------
I have no spark coming out of the coil (when I hook a spark plug to it and check)
Electrical does work, as I have lights. Ignition switch seems to be working, as I have wipers when ON, and no wipers when OFF.
I have checked and re-checked HEI module and it is correct
I have replaced it, to be sure it was not blown
I have checked it again, and it is wired correctly
I have added a 2nd grounding wire, to make sure 100% that it's fully grounding (here is one thing it might be? Maybe I should sand away some of the paint and ground it to bare metal)

When I put a 12V light on the B & C sides of the HEI module, and the key is ON, it lights up.
When I put a 12V light on the W & G sides of the HEI module, and the key is ON, it DOES NOT light up. If I hit the starter, it STILL DOES NOT light up?

Hope you guys put your thinking caps on this morning...

 

[Bort62]

Yes, ground it to bare metal.

Paint is non conductive.

 

[fordconvert]

W & G is a very low voltage signal. A digital meter may flick around a bit but to really see whats there you would need a scope.

Is there anything else connected between the - wire of the coil and C on the module? There should not be, that should be a single wire that only goes between those 2 places.

Hook a spark plug up to the coil wire and then take the wire off the C on the module and touch it to ground for a second, (key on) you should get a spark from the plug (also a small one where you ground the wire). That tells you that the coil works.

With the C wire still off the module hook your test light between B & C and crank the engine, your light should flash. IF it does module is working.

Hook the C back up and it should work.

 

[MustangSix]

I don't think you will see anything from the W-G side of the module without an oscilloscope. It is only sensing the alternating current waveform coming from the pickup and that is only a few millivolts and only when the reluctor passes by.

The only other thing I can think of is to check the pickup coil. There should be continuity if you unplug from the module and check between the orange and purple wires. There should not be continuity between either of those wires and ground.

 

[mysavioreigns]

I must've used too much paint then, let's hope.

 

[mysavioreigns]

I don't think you will see anything from the W-G side of the module without an oscilloscope. It is only sensing the alternating current waveform coming from the pickup and that is only a few millivolts and only when the reluctor passes by.

Sounds good - that makes sense.

The only other thing I can think of is to check the pickup coil. There should be continuity if you unplug from the module and check between the orange and purple wires. There should not be continuity between either of those wires and ground.

The pickup coil is the piece inside the distributor, correct? If so, I'm not sure if that's the problem. I get no spark coming out of the ignition coil, which the pickup coil is not a part of.

 

[MustangSix]

The pickup coil is the piece inside the distributor, correct? If so, I'm not sure if that's the problem. I get no spark coming out of the ignition coil, which the pickup coil is not a part of.

The ignition coil fires as the magnetic field collapses when the negative side goes to ground. If the pickup coil is dead, you won't get a spark because the module won't know to turn off the current to the ignition coil.

You an test the coil by hooking up 12V to the + side of the ignition coil, then shorting the negative side to ground. Every time you make/break that connection, the ignition coil will fire. That's how points work. If you can get a spark that way, you know the problem is either the module, the pickup in the distributor, or the wiring between them.

 

[grocery getter]

The pickup coil is the piece inside the distributor, correct? If so, I'm not sure if that's the problem. I get no spark coming out of the ignition coil, which the pickup coil is not a part of.

The ignition coil fires as the magnetic field collapses when the negative side goes to ground. If the pickup coil is dead, you won't get a spark because the module won't know to turn off the current to the ignition coil.

You an test the coil by hooking up 12V to the + side of the ignition coil, then shorting the negative side to ground. Every time you make/break that connection, the ignition coil will fire. That's how points work. If you can get a spark that way, you know the problem is either the module, the pickup in the distributor, or the wiring between them.

that is a very good tip :!: 8)

 

[mysavioreigns]

The pickup coil is the piece inside the distributor, correct? If so, I'm not sure if that's the problem. I get no spark coming out of the ignition coil, which the pickup coil is not a part of.

The ignition coil fires as the magnetic field collapses when the negative side goes to ground. If the pickup coil is dead, you won't get a spark because the module won't know to turn off the current to the ignition coil.

You an test the coil by hooking up 12V to the + side of the ignition coil, then shorting the negative side to ground. Every time you make/break that connection, the ignition coil will fire. That's how points work. If you can get a spark that way, you know the problem is either the module, the pickup in the distributor, or the wiring between them.

Awesome...I will give that a shot tonight before and after I move the ground to a better spot (just to track what I'm doing)

 

[fordconvert]

To check the pickup coil you can just hook an ohm meter to the orange and purple wires. You should get a steady ohm reading. You can also try and flex the wires around and operate the vacuum advance with a hand pump, reading should remain steady. If you then turn the engine/rotor the reading should go wacky in a pulsing sort of way then return to where it was when it stops turning.

Is there anything else connected between the - wire of the coil and C on the module? There should not be, that should be a single wire that only goes between those 2 places.

Hook a spark plug up to the coil wire and then take the wire off the C on the module and touch it to ground for a second, (key on) you should get a spark from the plug (also a small one where you ground the wire). That tells you that the coil works.

With the C wire still off the module hook your test light between B & C and crank the engine, your light should flash. IF it does module is working.

Hook the C back up and it should work.

 

[CoupeBoy]

Make sure the distributor has a good ground also, if you've painted the block you might not be making a good connection.

At home I have a DII, HEI module, and TFI coil that are not in a motor and I ran ground wires to all components to make sure that nothing was un-grounded. It works like a champ.

-ron