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:

[shoguneagle]

Pictures:

DME help: two brown wires which should be some type of ground; on my harness connected together with a connector.

Trunk help (911 reference ??): Now we get into why you need an ohm meter, schematics, etc to make sure the connections are made correctly; can easily verify by a continuity check (resistance path) to the various connection points:

#6 - has three wires that you are going to use; two to the tachometer (one of the blacks and the black/violet; you will need to trace these out as follows:
Black - from DME - 21
Black/violet - from DME - 11
{reference view as connected to tach}
Yellow - from DME - 4 (start only; tap 914 harness)
black - I did not use this wire; after separated from the others

#5 - looks like a black wire which goes to the "start and run position; tap 914 harness; need to verify this by tracing out back either to the DME relay or possibly to the coil. Also looks like a black wire on #3?? which could be this item.

#3 ?? - looks like a red/green wire which should be traced out; coming from DME relay #5 and goes through a 25amp fuse to the fuel pump; I believe you have to put in the fuse in the path to the fuel pump power wire.

- looks like a black wire which could be coming from the ignition coil and DME 5; reference back to #5 which could be listed above as the same item.

#4 - looks like a green wire??? and cannot tell what is suppose to be.

I think you now can see why you need to check the wiring to make sure you have the right connections.

Also, the wiring to the tach I did not use the connector shown (does not go to the back of the tach connection). wired in another connector which fit the tach connection and hard wired the shown connector with a bridge like Patrick's.

I have a schematic showing the connections and all the items related to the connections needed to be made; has reference to DME, DME relay, etc. I would be happy to send this information to you and should provide a clearer view of how things connect and relate to each other.

Steve Hurt