help with 3.2l conversion wiring, have a PMS 3.2l to 914-4 conversion cable but... Options

[jim912928]

Well, I have all of the mechanical work done for my 3.2l motronic conversion. Now I'm trying to figure out the wiring. I purchased the Patrick MotorSports conversion harness a few years back. It allows me to eliminate the relay board. However, electrical is not my forte...so I have some real questions on the "trunk" wires from the 3.2l harness and what to do with them. The engine, dme and wiring harness are all from the same car. So, here are my questions and you can relate them to the pictures as shown:

1. picture named "DME help" circle #1: by the dme connector...there are two little stub connections that seem to come out of the DME connector and both wires are brown....do these need to go to anything?

2. picture named "Trunk help" circle #2: I marked these fuel pump...do I cap these because I'm using the 914 wiring or do I need to connect them somewhere?

3. picture named "Trunk help" circle #3: I marked this positive battery...does the 914 harness cover this or do I need to connect it to the battery also?

3. picture named "Trunk help" circle #4: green and green/yellow wire...have no clue what this is?

4. picture named "Trunk help" circle #5: black wire by the wires I labeled "fuel pump"...have no clue what this is?

5. picture named "Trunk help" circle #6: white connector with a black, black/purple and yellow wire...have no clue what this is?

I also would like to know where you usually mount the DME and where do you pass it through from the passenger compartment into the engine compartment..and once on the engine compartment side...where do you route it up to the engine? Have pics from those angles?

Thanks all in advance!

Jim

DME help:


Trunk help:

[jim912928]

ok...I think I have the mystery solved...I'll verify when I get the wiring diagrams from Steve. But I used a combination of web based diagrams, info in this thread, a detail PM from Steve and searching the 911 tech forum on the bird board. So, here are the basics...there is 1 big wire and 2 additional harnesses in the forward section of the DME harness.

1. The big black wire labeled #3 in my first picture obviously goes to the positive side of the battery terminal

2. the bundle where I labeled #2 and #5 on my pic has the red/green wire (fuel pump), a black wire (coil) and another black wire (DME 5). I had labeled the red green with the painters tape with the 911 fuse box label as "fuel pump" and the black wire I had labeled "backup lights". The other black wire wasn't labeled but it is the DME 5 wire. I saved the 911 fuse/relay box cover and was able to line up the labels with the fuse positions. Then, on a 911 current flow diagram i traced them out and both of these black wires terminate on the inlet side of the 2nd fuse box (terminal #8 at 16a). I traced them back to the coil and DME Relay! The red/green wire also terminates on the inlet side of the 2nd fuse box (terminal #3 25a). So, I would think for the 914 we just need to find the right inlet side fuse box terminals to connect these to?

3. the 2nd bundle has a black, black-violet and yellow wire (labeled these #6 in my picture). The black/violet and the black both go to the tach on the 911 diagram. The yellow goes to the ignition switch on the 911 diagram. Looks like we just need to splice them into the corresponding wires on the 914.

4. there was an independent green/yellow wire with a green extension that just poked out of the harness (I labeled this #4 on my pic)....on a 911 these both connect into the Air Conditioning stuff.

So, all wires accounted for (I'll verify when I get steves diagrams)...now, all we need to figure out is which 914 fuse box terminals to tap into!?

Thanks Steve, bird board and anybody I missed for all the bit's and pieces! When we all get this stuff hooked up and working we'll have to document everything to make it ease for others to come!

Jim