Ballast resistor wiring
That is probably an old kit. The question is where the person tapped in to power the ECU. In a way it should be easier because they used wire with different colors than factory.
Barracuda wiring diagram is in the the '68 Plymouth Service Manual. I do not know if there was a supplement for RHD cars. Interesting they used a RHD Valient dash. RHD info is illustrated in the assembly drawings but I don't think we needto dig that deep to cover the basics.
Factory scheme for the main circuits; power supplies, main feeds, and ignition.
A is bAttery
R is alteRnator
J1 is Ignition switch feed
J2 is Ignition circuit to run the engine (and alternator field)
J2 is Ignition to start the engine.
A later ECU can be piggy backed onto the original circuits like this
Blue wire to the top of the pentagon connector is power to the ECU.
But the original 1970s ECUs have the additional wire going to a 5 Ohm resistor to help control the current the ECU pulled. That's not shown in the diagram above but you can draw it in.
That is probably an old kit. The question is where the person tapped in to power the ECU. In a way it should be easier because they used wire with different colors than factory.
Barracuda wiring diagram is in the the '68 Plymouth Service Manual. I do not know if there was a supplement for RHD cars. Interesting they used a RHD Valient dash. RHD info is illustrated in the assembly drawings but I don't think we needto dig that deep to cover the basics.
Factory scheme for the main circuits; power supplies, main feeds, and ignition.
A is bAttery
R is alteRnator
J1 is Ignition switch feed
J2 is Ignition circuit to run the engine (and alternator field)
J2 is Ignition to start the engine.
A later ECU can be piggy backed onto the original circuits like this
Blue wire to the top of the pentagon connector is power to the ECU.
But the original 1970s ECUs have the additional wire going to a 5 Ohm resistor to help control the current the ECU pulled. That's not shown in the diagram above but you can draw it in.