How to wire mid-1970s through mid-1980s ignition systems /
Retrofitting electronic ignition on vehicles that originally had points
By Vince Spinelli of spinellicreations.com
If you buy the Mopar Performance electronic ignition system, it comes with extensive instructions, wiring diagrams, and other information.
This is for a completely new electronic ignition system, replacing a current one (or a points system), on a Chrysler Corporation vehicle.
First, go down to the trusty auto parts store and tell them either:
They do the exact same thing; the 4 pin simply as extra ballast integrated into it. You can use a 4 pin box with a 4 pin resistor, but you cannot use a 5 pin box with a 2 pin resistor.
Dan Stern also pointed out that you will need a standalone, late-model, spool-type coil, either GM or Mopar, or an MSD Blaster, which fits the stock can-type coil bracket. Otherwise the coil will have a short life.
All connections to be made with 14 gauge wire, and please do use di-electric grease when you crimp or snap on a spade connector / butt connector / bullet connector… the environment under the hood will foul up and rust the connections if you don't.
The following diagram shows the 5 pin box with dual ballast resistor; "Start" is only hot (+12V DC) during cranking, and "run" is hot (+12V DC) from the moment you turn the key on, through crank, and after crank. (Note: Pat Conners wrote that wires 2 and 3 should go where 4 and 5 are, and vice versa. We'll check on this.)
Terminal positions may depend on the vintage of the actual ECU controller being used.
For the year / make controllers listed (basically taking 1980s era
Chrysler controllers and dumping them into older / newer engine bays),
the wiring is correct as originally posted above. The 1985 through 1988 Ram truck OEM shop manuals confirm this, as well as
the Haynes manual for 1974 through 1990 Dodge Trucks.
However, I make no claim as to whether the actual 'numbers' are right.
That is to say, the ignition boxes may be stamped with 2/3 and 4/5
flip-flopped, or they may be stamped "a","b","c","d","e" or any other
random combination. The numbers on the ignition retrofit diagram are
simply to provide a reference for dialogue... if you look at one of the
two listed ignition controllers with the 'pins' facing you, and the
large transistor heat sink pointed down toward your feet, then the top
pin (head of the 'star') jumps to the various other terminals on the ignition relay and the ballast... and so on and so forth.
The 4 pin box, with single ballast resistor: again, "start" is only hot (+12V DC) during cranking, and "run" is hot (+12V DC) from the moment you turn the key on, through crank, and after crank.
Method for vehicles that originally came with electronic ignition (by Dan Stern)
That's a fine tutorial on how to install a Mopar electronic ignition
box, but a GM HEI module creates a hotter spark and doesn't
use a ballast resistor. The way I do it:
10. Use either a standalone late-model spool-type coil (GM or Mopar) or spend the $35 on an MSD Blaster, which fits the stock can-type coil bracket. At the very least use a coil such as the Standard-BlueStreak #UC16 or NAPA Echlin #IC27. It's best, though, to use a coil intended for use with a high energy ignition system. If you'd like to mount the module off by itself somewhere, then a good coil option is the stock external-mount GM HEI coil used on 1975-84 GM cars (mostly with 4-cylinder engines). The coil is a Standard/BlueStreak DR35.
driveability, mileage)
12. The price of the electronic ignition's performance is paying more careful attention to the condition of your distributor cap, rotor and spark plug wires. You can also change them out. The trick piece in this department is a NAPA Echlin long-tip rotor # MO-3000, which has a brass contact 0.060" longer than stock. This means less arcing inside the distributor, which means less burn wear on the cap and rotor contacts and less ignition noise in your radio. Be careful about Echlin or Accel distributor caps, though; many of them are ground off-centre and can cause carnage when the rotor-especially the longer special one-hits one of the improperly-ground, too-big cap contacts. The safer alternative is a Standard-Bluestreak CH-410X. Get Magnecor wires and you won't have to think about your spark plug cables again for a very long time.
13. Drive and enjoy.
Large parts of Dan Stern's advice were adopted from the slantsix.org site with his permission.
We strive for accuracy but we are not necessarily experts or authorities on the subject. Neither the author nor Allpar.com / Allpar, LLC may be held responsible for the use of the information or advice, implied or otherwise, on this site. This page is offered "as is" and without warranties. By reading further, you release the author and Allpar, LLC from any liability.
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Copyright © VerticalScope Inc. All rights reserved. Dodge, Jeep, Chrysler, Ram, and Mopar are trademarks of Fiat Chrysler Automobiles.
Retrofitting electronic ignition on vehicles that originally had points
By Vince Spinelli of spinellicreations.com
If you buy the Mopar Performance electronic ignition system, it comes with extensive instructions, wiring diagrams, and other information.
This is for a completely new electronic ignition system, replacing a current one (or a points system), on a Chrysler Corporation vehicle.
First, go down to the trusty auto parts store and tell them either:
- I would like a 4 pin Dodge/Chrysler ignition "ECU" box from a 1983 pickup truck (example Dodge D-150 with 318 v8) - and the 2 pin ballast resistor that goes with it.
- I would like a 5 pin Dodge/Chrysler ignition "ECU" box from a 1975 pickup truck (example Dodge W-100 with 318 v8) - and the 4 pin ballast resistor that goes with it.
They do the exact same thing; the 4 pin simply as extra ballast integrated into it. You can use a 4 pin box with a 4 pin resistor, but you cannot use a 5 pin box with a 2 pin resistor.
Dan Stern also pointed out that you will need a standalone, late-model, spool-type coil, either GM or Mopar, or an MSD Blaster, which fits the stock can-type coil bracket. Otherwise the coil will have a short life.
All connections to be made with 14 gauge wire, and please do use di-electric grease when you crimp or snap on a spade connector / butt connector / bullet connector… the environment under the hood will foul up and rust the connections if you don't.
The following diagram shows the 5 pin box with dual ballast resistor; "Start" is only hot (+12V DC) during cranking, and "run" is hot (+12V DC) from the moment you turn the key on, through crank, and after crank. (Note: Pat Conners wrote that wires 2 and 3 should go where 4 and 5 are, and vice versa. We'll check on this.)
Terminal positions may depend on the vintage of the actual ECU controller being used.
For the year / make controllers listed (basically taking 1980s era
Chrysler controllers and dumping them into older / newer engine bays),
the wiring is correct as originally posted above. The 1985 through 1988 Ram truck OEM shop manuals confirm this, as well as
the Haynes manual for 1974 through 1990 Dodge Trucks.
However, I make no claim as to whether the actual 'numbers' are right.
That is to say, the ignition boxes may be stamped with 2/3 and 4/5
flip-flopped, or they may be stamped "a","b","c","d","e" or any other
random combination. The numbers on the ignition retrofit diagram are
simply to provide a reference for dialogue... if you look at one of the
two listed ignition controllers with the 'pins' facing you, and the
large transistor heat sink pointed down toward your feet, then the top
pin (head of the 'star') jumps to the various other terminals on the ignition relay and the ballast... and so on and so forth.
The 4 pin box, with single ballast resistor: again, "start" is only hot (+12V DC) during cranking, and "run" is hot (+12V DC) from the moment you turn the key on, through crank, and after crank.
Method for vehicles that originally came with electronic ignition (by Dan Stern)
That's a fine tutorial on how to install a Mopar electronic ignition
box, but a GM HEI module creates a hotter spark and doesn't
use a ballast resistor. The way I do it:
- Get a standard Chrysler electronic ignition distributor (wrecking yard, auto show, etc.).
- Get a good quality HEI module such as NAPA Echlin TP-45, ACDelco D-1906, or Standard-Bluestreak LX-301.
- Fetch a piece of aluminum 1/4" thick by about 2" by about 3-1/2"
- Drill two holes in it to match the HEI module's mounting holes
- Heat sink compound comes with every new HEI module. Squirt some onto your mount plate, put the HEI module on the plate, and secure the plate and module to the inner fender. Strictly speaking, this aluminum mounting plate is optional. It helps assure temperature and mount stability of the module. Some have done the mod by just bolting the module to the inner fender and had acceptable results, but in the long term, the aluminum is probably worth the trouble.
- Remove ballast resistor. Discard or keep in glove compartment to rescue fellow Mopar owner.
- Wire the module like this: (link dead)
8. Add a relay:
9. Assure is a proper module ground. It's rather difficult not to have this just by installing the module, but I like to run a ground wire to one of the module mounting bolts just to be sure.
10. Use either a standalone late-model spool-type coil (GM or Mopar) or spend the $35 on an MSD Blaster, which fits the stock can-type coil bracket. At the very least use a coil such as the Standard-BlueStreak #UC16 or NAPA Echlin #IC27. It's best, though, to use a coil intended for use with a high energy ignition system. If you'd like to mount the module off by itself somewhere, then a good coil option is the stock external-mount GM HEI coil used on 1975-84 GM cars (mostly with 4-cylinder engines). The coil is a Standard/BlueStreak DR35.
11. Open plug gaps from 0.035" to 0.045" (improved starting, idling,
driveability, mileage)
12. The price of the electronic ignition's performance is paying more careful attention to the condition of your distributor cap, rotor and spark plug wires. You can also change them out. The trick piece in this department is a NAPA Echlin long-tip rotor # MO-3000, which has a brass contact 0.060" longer than stock. This means less arcing inside the distributor, which means less burn wear on the cap and rotor contacts and less ignition noise in your radio. Be careful about Echlin or Accel distributor caps, though; many of them are ground off-centre and can cause carnage when the rotor-especially the longer special one-hits one of the improperly-ground, too-big cap contacts. The safer alternative is a Standard-Bluestreak CH-410X. Get Magnecor wires and you won't have to think about your spark plug cables again for a very long time.
13. Drive and enjoy.
Large parts of Dan Stern's advice were adopted from the slantsix.org site with his permission.
We strive for accuracy but we are not necessarily experts or authorities on the subject. Neither the author nor Allpar.com / Allpar, LLC may be held responsible for the use of the information or advice, implied or otherwise, on this site. This page is offered "as is" and without warranties. By reading further, you release the author and Allpar, LLC from any liability.
Home •
Engines •
Reviews •
Chrysler 1904-2018 •
Upcoming •
Trucks •
Cars
Spread the word via <!--Tweet or--> Facebook!
We make no guarantees regarding validity or accuracy of information, predictions, or advice - .
Copyright © VerticalScope Inc. All rights reserved. Dodge, Jeep, Chrysler, Ram, and Mopar are trademarks of Fiat Chrysler Automobiles.