Need help with wiring connector (993)

84toy · 09-15-2006, 08:11 AM

I need some help with a pin connector for a 95 993 engine. It is a large 14 pin male connector located about 1 foot from the DME . There are two 14 pin connectors and this is the larger one. I need to know what wire goes to what # on the connector. Any help appreciated.

The dismantler, sent it this way. Here are a few pics to show....

DW SD · 09-15-2006, 08:21 AM

Paul,
on my early 911, that one mates to the Patrick motorsports chassis conversion harness, which ties in the DME relays, tach and provides switched and continuous power to the DME, as well as power to the fuel pump, I think.

Are you going to run a conversion harness?

I have a PDF copy of the 993 engine and chassis manual I could send. That has the wiring diagrams. I think if you have the chassis conversion harness, most of it would be sorted out.

Post your email and I'll send the PDF file. Actually, just looked at the file, it is 352 Megs. send me your email and I'll burn it to a CD and send to you.
In the meantime, I'll see if I can post the pin outs.

Doug

84toy · 09-15-2006, 08:35 AM

Yep, I have a conversion harness but the wires are of course a different color. I also have the pdf version of the 993 manual but can't see it good enough to make it out. I was trying to avoid tracking every single wire since it is designed to just plug in and be done. If you have a pdf page of the actual pin connector\#\wire color, that would be great. Thanks!
paul@sayegh.org.

DW SD · 09-15-2006, 08:48 AM

Paul,
I believe it is on page 1163 of the 993 manual.
I sent you an email with a PDF file of the page attached. Looks like the right colors on the wires. Tip is the very large Red / White (4.0 size).
See if the colors match up to what you have there.

Doug

84toy · 09-15-2006, 09:45 AM

Got it. Thanks! It matches perfectly except for the last wire (#7) Mine is a brown wire not a OR/YE. So I'm getting closer anyway. Only terminals #1-4 and #10 are used anyway and they all match.

Bill Verburg · Bill Verburg's Garage

What year was the donor? there is a set of wiring diagrams for 993 model 95 and another set for 993 model 95/2

DW SD · 09-15-2006, 09:55 AM

Paul,
Glad to be of help to you.

Doug

84toy · 09-15-2006, 10:02 AM

Bill, My engine is a 95. I noticed the 95 and 95/2 as well.

In the PDF manual I have, it shows 2 models as you state but when I look, there is only one engine diagram and it says 95/2. Can't find one for just 95.

Bill Verburg · Bill Verburg's Garage

This is from the series 1 wiring diagram
my guess is connector X4-1

But here is connector X4-2 just in case

DW SD · 09-15-2006, 10:50 AM

Bill,
How do you print to a post-able format? I print to PDF.

Is it a print driver that prints to JPEG?
XM/1 was the same connector I sent to Paul.

Doug

Bill Verburg · Bill Verburg's Garage

scan, use the scanner to crop, save as a .jpg

84toy · 09-15-2006, 11:28 AM

Thanks Bill, yes, it's the X4/1 Everything matches except pin 7. My wire is brown, most likely ground and has me concerned. Thanks for helping guys. Always appreciated

Bill Verburg · Bill Verburg's Garage

I believe that pin 7 on X4/1 is for input from a tip.
but don't hold me to that, I am not 00% sure

84toy · 09-17-2006, 11:19 PM

Bill, you were pretty close. I ran an ohm meter from that wire to the pin that was active on the DME connector. That location is # 42 on the 55 pin connector called selector lever switch. Got it all hooked up.......Thanks to those that helped!

arrivederci · 06-25-2014, 06:12 AM

Does anyone have the wiring diagram showing the 14-pin to 88-pin connections? I have talked with Timmins and he has been very helpful. But I am troubleshooting a fuel pump not powering up and want to double check that I have everything wired correctly.

I also found this that Bill posted:

http://forums.pelicanparts.com/porsche-964-993-technical-forum/589783-993-88-pin-dme-wiring-diagram.html

For more details of what I'm dealing with:

http://forums.pelicanparts.com/porsche-911-technical-forum/643329-72-rust-repair-long-overdue-update-4.html

http://forums.pelicanparts.com/porsche-911-technical-forum/812497-3-6l-conversion-questions-wiring-1996-vram-into-1972-a.html

DW SD · 06-25-2014, 06:29 AM

Quote:

Originally Posted by arrivederci

Does anyone have the wiring diagram showing the 14-pin to 88-pin connections? I have talked with Timmins and he has been very helpful. But I am troubleshooting a fuel pump not powering up and want to double check that I have everything wired correctly.

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Just a thought:
The pump doesn't power up until the engine is cranking (and DME sees pulses from the crank position sensor). This is a safety feature. Are you testing it this way?
I wired my pump through the fuse box and any time I needed to prime, I'd just add a jumper to the terminal lug at the fuse box.

Doug

arrivederci · 06-25-2014, 07:34 AM

Quote:

Originally Posted by DW SD

Just a thought:

The pump doesn't power up until the engine is cranking (and DME sees pulses from the crank position sensor). This is a safety feature. Are you testing it this way?

I wired my pump through the fuse box and any time I needed to prime, I'd just add a jumper to the terminal lug at the fuse box.

Doug

The engine cranks and I still don't get power to the pump. My pump power comes directly from the Timmins dme harness. So I am tracing back to the factory dme harness to ensure I have things wired correctly there. Also will be testing the dme relay in the various states (ignition on, cranking, etc). I have tested the pump itself with 12v power and it works fine. Timmins said that the crank sensor isn't that picky and as long as it sends any pulse, the dme should engage the fuel pump.

My engine harness came without the 14pin connectors attached, so I have mapped wire colors to the 14 pin plugs with the diagrams above. The problem is that I am missing one green/black wire so I know something is amiss. Timmins says that the wires I need are identical between the 55 pin and 88 pin harnesses but I'm still unable to explain the fact that I can't get things to match up.

Which leaves me wanting to see the wiring colors from the 88 pin to verify what I am working with. That's where I think the most obvious problem could be.

DW SD · 06-25-2014, 07:46 AM

Suspect you are on the right track with the missing wire.

Can you confirm the DME itself is getting power? Are you getting spark or power at the coils under cranking - that would be easy for which to check?

About a decade ago, I had a situation where I initially wired the DME to a terminal in the fuse panel that doesn't see power under cranking (like an accessory power source). The engine would only catch after letting off of the starter. That was initially puzzling.

Doug

arrivederci · 06-25-2014, 08:59 AM

For the first 30 minutes, I went through that scenario...had my wiring going to the cig lighter power. I changed that over to a wire that gets power while cranking (drops to 9.5v or so).

I do plan to test the DME power and coil as well. I just ran out of time on Sunday...

But I know for a fact that my fuel pump isn't getting power.

arrivederci · 06-29-2014, 06:07 AM

Turns out it wasn't a missing wire...the 1996 obd-ii wires are different colors on the x4/2 harness. Got that sorted and think I am now dealing with a dead CPS. I will know for sure when I get a new CPS in my hands.

I plan to post the right colors for others to reference when I get a chance to sit down in front of the computer. While I wait for a new CPS, I get to install new linkages in the tunnel...later clutch cable and 964 throttle cable. Fun!