im using an external pump off a VL holden commodore.
made a bit more progress tonight. i have figured out what 3 of the 4 wires are for.
Black wire: runs to the ECU for the ignition timing signal
Black/Yellow wire: runs to the ECU for the ignition confirmation signal
Black wire: runs to that yellow plug for the main power
Black/Orange wire: runs to a yellow 2-pin plug with an adaptor thing on it with a fuse in it (pictured below).
I have traced all these wires off a separate loom, possibly off a red top. I have found the black wire for the timing signal on my ECU plug, but don't know where the other end of it is!
I am not sure about the black/yellow wire for the confirmation signal though - on the ECU pinout that I've got it says that wire runs to the 5th pin, with the 14th pin (the one directly under the 5th) being blank.
on my loom there is a black/yellow wire running to the 14th pin, and the 5th pin is blank. it could just be that the pinout ive got is slightly different, but i presume if i take the lid off my ECU I can find out whether it should be the 5th or 14th pin right?
Now for the 4th wire...the black/orange (on the redtop loom) goes to a yellow two-pin plug with that fuse adaptor plugged into the end of it. whats this for? and do i need it? This is the only wire i can't find on my own loom. It also has a white wire running off the plug (not sure where it goes to).
hope all of this stuff makes sense...seeing as i can find 3 of the 4 wires on my loom, i might have to strip my loom back and find out where they end up - then strip the wires off the redtop loom onto the corresponding wires on my loom. yes? no?
im not an autoelectrician, and ive had a few people look at it and give up on it so thats why im trying to sort it all out myself!
thanks for reading all this, hope it makes sense! and thanks for your help.
-matt