EMS harness colour coding

[Battson]

So, having started at the beginning when installing the wires. I found the power wiring section talks about 3 colours - Red Yellow Black. So I spot a red yellow black twisted group. I tried to check the red to make sure it was the right one, but the multimeter didn't fit inside the DB-37 plug, but there can only be one Red Yellow Black group, right... to make sure I searched for another yellow wire. There was none - surely this can only be the power wiring group. I cut them to length and install them as directed.

Then when I come to install the fuel flow transducer (which needed full length wires to reach the transducer), to my shock I find there is another Red Yellow Black group discussed, and instantly realised luck would have it that I have used the wrong one for the power wiring. The manual doesn't mention either is supplied as a twisted group. I cut a length of wire, stripped it, and pushed into into the plug. The multimeter confirmed I'd hacked off the wrong wires from my harness. :'(

Can I suggest some warning in the manual about the two sets of the same 3 colours, or a change in one of the fuel flow wiring colours, to prevent this mistake waiting to happen from catching others out. Why have the two sets the same 3 colours?
I am off to order some more butt-splices.

 

[Dynon]

Sorry about the confusion there. We'll see if there's a way we can make that clearer.

 

[Battson]

Thanks for listening to my rant!  I was able to retrieve the discarded wires and splice them in fine 

Despite appearances, I'm not acutally an idiot  :-X    ;D


I subsequently noted that the keep-alive wire (Yellow) isn't actually supplied with the harness. It might pay to mention that in the manual, because that would provide a dead-giveaway that the twisted group with the Yellow isn't the Red Yellow Black set which is tabulated in the power wiring section.