One of the most common wiring problems experienced is poor grounding. There should be no paint, anodising or other surface layer protection between the ground wire and engine block or chassis. Temporary wiring will almost certainly cause a problem, use a proper ground eyelet terminal and do not use loctite or similar locking agents as they may become insulators preventing good earth connection. Battery Ground (Black) should be connected directly to the Battery negative terminal.
Power and Ground Wiring
Black (Battery Ground) Red_Green / Red / Red_White (Battery Supply 12V) Pink (Ignition Switch 12V) Locate and connect the following flying leads.(Wiring based on the Haltech Elite Premium Harnesses)
ECU Grounding – the DOs and DONTs
If you follow any online forum where vehicle wiring is discussed it won’t take long before you come across a debate about the best way to ground your ECU. So today we are going to get our nerd on and look at the theory of electronic circuits and help ...
Red_Green / Red / Red_White (Battery Supply 12V)
The power wires must be wired via the shortest route possible to the battery positive terminal. The main power to the ECU must be connected to the battery and NOT the ignition switch, the ignition switch will not be able to handle the current ...
Battery Voltage Diagnostics
This feature allows a warning light to be connected to alert the vehicle operator that the vehicle battery voltage is below a certain voltage. Wiring Tab Connections Output Active State Display Tab Warning Minimum Warning Maximum Diagnostics Tab ...
Battery Voltage These settings define the maximum and minimum value allowed before the respective warning indicator is activated.