ECU help !!!

[Vertburt]

hi all. I have a 70 satellite and installed a 1972 440 with electronic ignition. I know where the wires go on the ecu box but having trouble understanding diagrams showing where the wire goes to the ballast resistor. Also do I use the original positive wire to the coil. Any help would be appreciated. Thanks

 

[coronet68mx]

Let's hope the high priest of the amper temple answer your question
Nacho donde andas ?
@Nacho-RT74

 

[BeepBeepRR]

This is pretty simple to follow. since you have to add a wire,The red one shown in picture. You should go to a parts store and pick up one of these. Makes it easier than splicing wires.

 

[Nacho-RT74]

The diagram posted is just right for cars with starter relay feeding ballast bypass instead being running from ign switch. This setup changed on 75 or 76, can't recall.


The yellow wire on diagram is actually brown on earliers and runs from ign switch not starter relay

I have several diagrams around. Will post later from my laptop where I have all the info. I'm posting from the iPad at this moment.

 

[Nacho-RT74]

this is one of the many diagrams I have made.

if ECU is 4 pins, the 4 prongs ballast is not needed so the blue wire jumper between ballast prongs and the green traced red wire coming from ECU to the secondary resistor ( 5 ohms ) won't be needed, and use the single ballast will be pretty much enough.

 

[Vertburt]

Ok thanks. But my question is do I go to the right or left side of the ballast Right side is one wire and left side has two wires.

 

[Nacho-RT74]

resistors are bidirectional, can be connected on either way. The two wires end is the wiring net to bypass ballast while cranking feeding straight to coil and both are brown for 70 and lates. pretty much clear on diagram

 

[Vertburt]

Ok thanks. So do I run it to the single or dual wire side of the ballast ? And I will have just the one positive wire going to the coil that is in the cars original harness ? I know the one wire goes from the ecu box straight to the negative coil.

 

[Nacho-RT74]

if you meant the blue traced yellow wire from the ECU system which is the positive ign key source... as the diagram shows, to the blue wire on engine harness... which is the single wire on single ballast system

now, is your ECU 4 or 5 pins ?

 

[Vertburt]

4 pin

 

[Nacho-RT74]

Ok, you won't need to wire the secondary resistor and can keep single ballast. The green traced red wire won't go anywhere. However wiring it with dual ballast just like diagram shows, will allow you to use 4 or 5 pins ECUs anytime