Wiring
See the wiring diagrams in the sub folders for each type of throttle valve. There may also be custom firmware for different models like the Citroen TxW. Make sure to connect the free wheel diodes correctly and let the Mercury2 power its own relay as per drawing. Note that the dual throttle requires 4 diodes to eliminate spikes. After the unit is tuned you may load the lock file which means the firmware does not have the ability to write to memory during interference spikes on the micro. If you need to make adjustment reload the normal firmware.
Standard Universal drawing
Orion2 Universal Wiring Diagram
Specific models drawings
Harness design drawings