ECU / Main Harness

 

This section for me was certainly the most complicated however it was also extremely rewarding. I learnt to read wiring diagrams, understand relays and most importantly solder!

 

Here is a summary of what systems I had to combine

1. Autowire Full Wiring Harness

2. FG Falcon Wiring loom/ecu

3. Push Button Ignition System

 

1) I have purchased the Autowire full wiring harness for the Mustang. This is a great product and became a solid base to work around. Some key benefits of scrapping the old wiring and replacing it with this kit were;

 

• All new wiring and connectors

• Uses blade fuses

• Incorporates a new larger fusebox with added wiring for electric windows, fuel pump, A/C Heat  etc.

 

 

 

2) To get the FG engine to work I sent up the engines ecu as well as the FG dash loom and engine loom to Killa Kustom Kables. Steve did a great job of removing unnessasary wiring and creating a stand alone wiring loom. The following items were kept when completing the conversion;

• Edit ** I did state originally that the ecu needed obtain a speed signal via a  8 tooth trigger wheel and speed sensor (Hall Effect Sensor) that was installed on the back of the gearbox. This was the only way at the time to allow the system to know when to shift. I have since learnt that the FG ECU can actually grab the speed signal from the ZF transmission. Advancements in tuning software over the past 4 years have given tuners the ability to access and control this within the ecu setup. This is only available for FG and ZF setups I believe. Other combinations may require a trigger wheel, or even an ABS module to send the signal through. Best to talk to an experienced tuner prior to deciding on what setup to go for. 

• The ECU was also sent to Bullet Performance Racing to have the relevent security codes removed as well as syncronised with the new Hall Effect sensor (see edit above - this hall effect sensor may not be needed now). 

• I was able to keep the cruise control functions and Steve wired in 4 chrome push buttons to control on/off, and set + and -\

• I was able to keep Ford's main data connector on the Loom which enables me to plug in an SCT Tuner and remap the tunes on the car.

• The stand alone system had its own fuse box created to control items controlled by the ECU. These included 2 x Fan relays, and 1 x Fuel pump relay.

 

 

Overall this was a great addition and only required around 6 wires which needed to be stitched into to the main harness.

 

 

 

3) Instead of using the old ignition system of the Mustang I decided to go a bit more modern and get a push button igniton system.  I routed all power that was reliant on the old ignition system through this system.

 

 

 

How To Combine Them All

 

 

Well now came the fun part where I had to combine all of these systems together. This included the three items listed above as well as the Dakota Digital VHX control module for the guages. At this time the car was at LMS getting the rear end complete but I didn't want to waste any time especially as it was the Easter long weekend. I wanted to get to work cutting off unnessasary wires and soldering everything together. Big problem is, where will every thing mount?  I needed to build something to hold all the core modules and fuse boxes.

 

As you can see on the right I first built wooden struction to test fit all of the components on. Once I was happy with this layout I then got to work building the structure more precisely and  most importantly out of aluminium. Photos of the build are below. Once this was complete I then got to work combining it all together.