howsit
Pin 1 (Red/White): Yes, this is normally 12V+ from ignition. All injectors receive constant 12V+ here. Pin 2 (Brown/White): Controls injectors 1 and 3. This is the negative trigger from the DME. Pin 3 (Brown/Yellow) controls injectors 2 and 4, also a negative trigger from the DME.
2.Pin 55 should be connected to a clean chassis ground or engine ground. It ensures proper grounding for ignition-related components. Do yourself a favour and make sure this grounding is properly done with the right gauge cable and secure it mechanically, dont take a shortcut since improper grounding will create lots of other issues and ghost faults for nothing if you dont make sure. Make sure.
3. These pins are for the Cyl-ID sensor, which helps the DME identify cylinder #1 for and ignition timing.usually it mounts near the camshaft or flywheel, and yes, it uses the same cps plug type.Connect it to the sensor input on the DME and ground it properly. Make sure, then make sure again.
4. The ignition coil gets 12V from ignition switch via a relay. Negative trigger from Pin 25 on the DME to fire the coil.
5. that one wire left which is grey with white strip is ground or signal ground for the airflow meter. The other 4 wires that go to the DME are 12V+, Ground, Signal output to DME and the Air temp sensor signal.
check all this properly with a wiring diagram. I am not a pro at this. I dont do any of this stuff anymore. Ive been electrocuted many times from bad choices and not using adequate lighting to check wiring colours properly. Red, brown and pink all look the same to me on old wiring sheaths.
I need glasses.