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> Wiring up a 3.2l Motronic FI engine, my "how to" steps I used
jim912928
post Mar 11 2011, 05:46 PM
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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)

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jim912928   Wiring up a 3.2l Motronic FI engine   Mar 11 2011, 05:46 PM
jim912928   Now, I placed the Motronic Unit on the passenger s...   Mar 11 2011, 05:49 PM
SirAndy   :thumbsup:   Mar 11 2011, 05:57 PM
jim912928   Now, in the passenger compartment, I routed all of...   Mar 11 2011, 05:58 PM
jim912928   For the #1 wire (B+) I connected directly to an op...   Mar 11 2011, 05:59 PM
jim912928   For #2, #3 and #4 above I used a 3 pole fuse box f...   Mar 11 2011, 06:02 PM
jim912928   The # 5 wires are for the air conditioning…so I ...   Mar 11 2011, 06:02 PM
jim912928   The #6 yellow wire needs to be wired to ignition s...   Mar 11 2011, 06:04 PM
jim912928   #7 is simple..connect to motronic unit, #8 plug in...   Mar 11 2011, 06:04 PM
jim912928   Now for the engine bay, I eliminated the relay boa...   Mar 11 2011, 06:06 PM
jim912928   So, that is it, after all of those connections eve...   Mar 11 2011, 06:07 PM
echocanyons   Excellent and concise write up! This is sure ...   Mar 11 2011, 09:00 PM
CaltranCraig   I know this is an old post, but it's a good on...   Mar 21 2012, 12:35 PM
jim912928   I'm not sure of the size...but I think they we...   Mar 21 2012, 01:21 PM
mepstein   This is an awesome post. Will save so much time in...   Dec 29 2014, 07:59 PM
Cairo94507   Yes, I had not seen this before and it is a concis...   Dec 30 2014, 07:52 AM
rhodyguy   A 'classic' thread for sure.   Dec 30 2014, 09:58 AM
fitchesbass   Apologize for bumping this thread from several yea...   Apr 24 2023, 10:02 PM


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