Wiring up a 3.2l Motronic FI engine, my "how to" steps I used Options

[jim912928]

First, there are too many people to thank in here for all of the knowledge and advice on what they have done hooking up their 3.2l conversions...thanks all!

Let’s start with identifying all of the wires on the Harness:
#1 Black wire (thick): battery + (on the 911 was connected directly to the + battery post)
#2 Black wire: ignition coil (must tap into power for start and run)
#3 Red wire: power feed to fuel pump (put an inline 25 amp fuse)
#4 Black wire: DME relay (must tap into power for start and run)
#5 Green wires: do not use, these branch over to the air conditioning components in the 911 front trunk
#6 This connector has three wires in it:
........Yellow wire: tap into 914 start only from ignition switch
....... Black/Violet wire: to tach (attach to terminal #2 on 911 tach)
....... Black wire: to tach (attach to terminal #1 on 911 tach)
#7 Connects to Motronic Control Unit
#8 Connects to DME relay
#9 Connects to Altitude Sensor
#10 Leave alone unless this is an original California Car. If California…connect together (this is per the current flow diagram)

[fitchesbass]

Apologize for bumping this thread from several years back. Informative thread thanks!

I am working through this wiring right now.

The project I inherited has motronic in the trunk. I may move it to the passenger seat location. The setup is using the Patrick motorsport 14 pin connector.

For item #6 — my comparable plug set has four wires — not three. See attached image. Any insights on the difference here as compared to the three wire referenced in this thread?

Thank you!