Help me please
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
You haven't stated which coil you did actually use, but I am pretty sure it wasn't the one off the 82 Bronco.
The resistor reduces the current flow to the DS2 ignition module also, as this is a series circuit. While it might be true that the coil you used could indeed survive without a resistor the DS2 module which is next in line won't.
With the DS2 ignition system it is very importance to use all the correct original parts, don't mix and match parts or you will be walking home often.
Jim
The resistor reduces the current flow to the DS2 ignition module also, as this is a series circuit. While it might be true that the coil you used could indeed survive without a resistor the DS2 module which is next in line won't.
With the DS2 ignition system it is very importance to use all the correct original parts, don't mix and match parts or you will be walking home often.
Jim
D7AZ-12250-A .. Resistor Wire-Ignition Coil (Motorcraft DY-213) / Obsolete - Available NOS & from auto parts stores.
49" long / Color coded red with green stripes / 1.30-1.40 ohms resistance / #16 gauge wire.
Cargo Master
Joined: Mar 2008
Posts: 2,573
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From: Washington
To read primary resistance, set the DVM on the lowest OHM setting and touch the leads together.
Say it now read .2 ohms... now read the primary resistance... POS to NEG posts. If it reads 1.5 ohms - the starting .2 ohms = 1.3 ohms
If you try this on the 20K setting it will just show zero.
Jim
Say it now read .2 ohms... now read the primary resistance... POS to NEG posts. If it reads 1.5 ohms - the starting .2 ohms = 1.3 ohms
If you try this on the 20K setting it will just show zero.
Jim
Cargo Master
Joined: Mar 2008
Posts: 2,573
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From: Washington
So with the meter set on the 2 ohm scale and the 2 DVM leads touching the 2 post on the coil it reads.... "nothing"
"nothing" means the display goes blank and there are no numbers on it, or does "nothing" means something else??
"nothing" means the display goes blank and there are no numbers on it, or does "nothing" means something else??
Moderator
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From: Denver Metro Area, CO
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Junior User
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Do a search of my name look for thread Ignition help needed on 5-20-15. Franklin2, Gary Lewis, JimsRebel were there with the advice
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Moderator
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From: Denver Metro Area, CO
That's a pretty presumptuous, ballsy approach, to come here asking for help and telling me/us to go do the work of looking up one of your threads from a year ago when questions are asked in an attempt to help you....
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Junior User
Joined: Apr 2015
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well I could have gone thru it all for you here but it is 3 pages long, and I thought that you might get more out of it if you read it. It takes about 15sec to do the search. But I'm sorry for causing so much hardship. I will copy it all and post it here if that's what you want. It was determined by the moderator and others at the time I did not need to add a resistor because the resistor wire was working and my coil was within limits.
pedant
Joined: Jan 2008
Posts: 23,576
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From: EXTREME southwest CT
If you want to determine resistance in the harness, ohm between coil+ and module +.
The resistor wire is in the harness between these two points so you can do this with the key out of the ignition.
Do you have continuity between coil- and ground with the ignition off?
The resistor wire is in the harness between these two points so you can do this with the key out of the ignition.
Do you have continuity between coil- and ground with the ignition off?
Cargo Master
Joined: Mar 2008
Posts: 2,573
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From: Washington
I did go back and read the original thread ...
https://www.ford-trucks.com/forums/1...lp-needed.html
And you did do a correct DS2 swap with all the correct stuff, so I was wrong to just presume you used the wrong coil or had to high of a voltage to the coil... sorry
Based on your current readings, coil primary ohms, compared to what it was when you first installed it, it would appear the the coil primary is burnt OPEN. This is a rare failure and not what I expected.
So take your coil and the DS2 ignition module in the the auto parts store for a free test.
Jim
https://www.ford-trucks.com/forums/1...lp-needed.html
And you did do a correct DS2 swap with all the correct stuff, so I was wrong to just presume you used the wrong coil or had to high of a voltage to the coil... sorry
Based on your current readings, coil primary ohms, compared to what it was when you first installed it, it would appear the the coil primary is burnt OPEN. This is a rare failure and not what I expected.
So take your coil and the DS2 ignition module in the the auto parts store for a free test.
Jim
pedant
Joined: Jan 2008
Posts: 23,576
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From: EXTREME southwest CT
Gary includes the test procedures from the EVTM on his website.
Start, Ignition, & Carb Circuits - Gary's Garagemahal
Start, Ignition, & Carb Circuits - Gary's Garagemahal
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Junior User
Joined: Apr 2015
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I tried to determine resistance in the harness, ohm between coil+ and module +. I used red wire coming from firewall to module and I measured it at connector just before module. This was with horseshoe connected, reading was 26 ohms. And coil - to ground with horseshoe connected was .522 ohms