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]

For #2, #3 and #4 above I used a 3 pole fuse box from my 911 donor. The feed banks are all connected (all powered by 1 feed) and this wouldn’t work for the wires noted because the fuel pump is not getting power from the fuse panel. So I modified the fuse panel from behind to have only 2 banks interconnected. I mounted this fuse panel right next to the 914 one. Routed the Red fuel pump wire through it with a 25A fuse and continued the new wire up through the front wall and down to the fuel pump. The two black wires (ignition coil and DME) I connected to one side of the fuse block and connected 1 new wire from the feed side to an open “power on” spade on my fuse box (terminal 9). I used 14 gauge red and black wire in these applications.