Found some interesting reading here too, first time i seen on a Ford document that the blue wire was on solid state ignitions only i.e. pre 1976


Jeep CJ Duraspark Ignition Module

 

first, i would like to say that this is the best information that i have seen yet reguarding ford B/L - duraspark ignitions. my question(s) are:

there was a coment about the early B/L ignition modules. it stated that they were called the never spark! does this apply to the 1975 ( green insulator ) motorcraft # DY166B unit.

i aquired 10 of these for dirt cheap and i'm hoping to use them.

 

The DY166B Green Grommet Duraspark-I is not as good as the Duraspark-II Blue Grommet module DY893. They are also not compatible with each other. The reasons are more wiring to go wrong, and the higher cost of replacements for the Green grommet module. The DS-II took all the quirky bad parts out of the DS-I, so to speak. They never did get better than the DS-II Blue grommet, in my opinion.

However it's not as bad as the "Neverspark" module that Bill mentioned earlier. Red grommet. I actually remember that fiasco. It was televised. Drive the car off the new car lot and Poof module went bad...

 

here's what i have. all of these units came in "standard ignition" factory boxes , marked LX- 201. non have ever been pluged in. non have the extra blue wire. they all have green insulators and six wire configured exactly like a "blue insulator" units. connectors are exactly the same also. all the information that i have read so far indicates that duraspark 1 units only came with red insulators. your comments are welcome.

thx for your time.
tbolt

 

As original ~ Genuine Ford Parts

D5AZ12A199C .. Ignition Module (Motorcraft DY166B)

D5AZ12A199C replaced D5AZ12A199A and D5AZ12A199B

Marked: D5AE-12A199-A1A / D5AE-12A199-A1B / D5AE-12A199-A1D

Marked: D5AE-12A199-A2A / D5AE-12A199-A2B / D5AE-12A199-A2C / D5AE-12A199-A2D.

Fits: ALL 1975 Ford Passenger Cars/Trucks/Bronco's/Econolines.

 

thank you for responding. my original question was : are these units of the type called " never spark" or are they a reliable ignition module? i have : 1970 maverick ( coverted to 302), 1969 F100 - 390 and 1967 custom 500 - 428. if these units will work reliably - - i will convert all three vehicles to this B/L electronic ignition system. if these are the " problem" modules, then i will purchase the blue insulator duraspark II modules.

 

The blue grommet are the most reliable of the Duraspark modules and the ones most often used when converting over from Duraspark I.

 

I am dealing with this same issue now. I have a 1975 6-cyl 300 in my 1966 F-100. When I bought the truck the engine still had the 1966 distributor, with the points. I am wanting to upgrade it to electronic ignition and I installed a 1975 dist, coil, and what turns out to be a DSII module (no blue wire). My engine cranks but no ignition. So I'm thinking that blue wire on the DSI is the issue. My further question is this: it appears that 1975 was a transition year between points and the DSII. Was what is being called a DSI the standard module in 75?

 

MY 77's wiring had been cut up and hacked so I bought a 75 truck for parts. I ended up replacing all the wiring from the 75 and had no spark. After alot of work, I exchanged the blue module with the green ignition module from the 75 to get it to run. Simple right? Took me a week to figure that one out. I bought an extra green one at Carquest for $21 which also worked fine. I didn't know about the extra wire or of any issues with mine. You've recieved much better information than this already, but thought, I'd mention it anyway.

 

<TABLE border=0 cellSpacing=0 cellPadding=0 itxtvisited="1"><TBODY itxtvisited="1"><TR itxtvisited="1"><TD bg*************** itxtvisited="1">If you look at the 1975 diagram below, you will see 7 wires coming off the module. But the ignition module I have installed has only 6 wires. It doesn't have the blue one. That probably explains why it won't start. So the question is, was this additional wire particular to the 1975 system? It seems after that, on the Duraspark II, it was eliminated. If so, I guess I need to swap 6 wire module for a 7-wire. Anyone ever run into this?




</TD><TD bg*************** vAlign=top align=right itxtvisited="1"></TD></TR><TR itxtvisited="1"><TD bg*************** itxtvisited="1">Rating: 8.00 (4)</TD><TD bg*************** itxtvisited="1"> </TD></TR><TR itxtvisited="1"><TD bgColor=#dfdfdf colSpan=2 itxtvisited="1">Description: 1975 Ignition Wiring Diagram</TD></TR><TR itxtvisited="1"><TD bg*************** colSpan=2 align=middle itxtvisited="1"></TD></TR></TBODY></TABLE>

 

The blue "shunt" wire was only used in 74/75 (the 74/75 modules are not interchangeable though) the blue "shunt" wire was deleted from Duraspark modules after 75.