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)

[jim912928]

The #6 yellow wire needs to be wired to ignition start only. Rather than pulling the wiring harness apart and tapping into the yellow wire from the ignition switch…I just ran a long yellow lead wire back to the passenger seat where I still have the seat belt warning stuff. I had bypassed this by connecting the two big yellow wires together…so I joined my new lead wire at this point. For this I used yellow 16 gauge wire to match what was coming from the DME harness. The black/violet wire I extended with 16 gauge violet wire and connected it directly to terminal 2 on the 911 Tach. The black wire I extended with a 16 gauge black wire and connected it to terminal 1 on the 911 Tach. Don’t forget to reconnect the 914 Red wires to terminal 5 on the 911 tach and the brown (ground) wires to terminal 6.

Here is a lame picture of the wrong side of the tach to be looking at...but I'm not going to pull the tach back out for a pic!