HOW TO DO AN ADVANCED SEARCH.

Mon Jul 08, 2013 3:56 pm by Admin


For the benefit of 944Hybrids users there are two search functions available for you to use.
The purpose of this sticky is to explain the "Advanced Search" function because it is much more powerful and is the best choice when researching information.

When you log on to the site a list of options is shown in a line at the top of the page. One option is labelled "Search", use this option (NOT the search box lower down on the right).

After you click on the upper search option, a drop down box appears. At the bottom of this box is a radio button marked "Advanced …

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14 Pin Connector - Check Please 5 3.7 3

14 Pin Connector - Check Please

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14 Pin Connector - Check Please

Post  Bluemach1 on Thu Aug 19, 2010 11:58 am

I am getting ready to integrate my 14 pin connector to the harness. I made my notes on what wires are going to be connected to. However, I have misplaced my notes (other than the 14 pin connector sheet) and now I am stuck looking at this again and wondering why I chose my pins.

I have made notes that pin #5 gets grounded. pin #7 goes to C101-H. I think that this was for fuel pump? I dont know now.
http://944hybrids.forumotion.com/gallery/Personal-album-of-Bluemach1/14-Pin-Connector-Assignments-pic_1096.htm

Check me on these conections please. Car is a 1986 Turbo.


Last edited by 944-LT1 on Sun Aug 29, 2010 2:17 pm; edited 2 times in total (Reason for editing : note)

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Re: 14 Pin Connector - Check Please

Post  Bluemach1 on Fri Aug 20, 2010 10:37 am

OK, combing back through postings (still cant find my notes!) I think that I got the changes in the first post from Bridars write up. However, his was a 968. mine is a 1986 944 Turbo. Not the same right?

I found the following on the PHB. It is different than what is in the manual. Most notably is tying #3 and #4 together. #7 is not tied to the LS harness at all.

My notes are in (RED)

Thanks for your input. I hope to put this to rest forever!
_______________________________________________________________________________________
Re: need a pinout on '86
Posted by marc a on Sat Sep 13, 2008 8:58 pm

Connector T21 (14 Pin Connector located on Driver's Side Firewall in Engine Compartment)

Color--Pin-------Use------------------------------------Modification

GN---1--------Ignition Coil------------------------------Not used on LS1

RE/BL-2-------- NOT a Ground---------------------------NOT USED ON LS1 harness

RE/YE-3--------Terminal 87--SWITCHED POWER------------CONNECT ONE OF THE WIRES TO PIN 4
-----------------------------2 WIRES, SAME COLOR -------- WIRE AND THE OTHER TO THE POWER
------------------------------------------------------------FOR THE PCM (??????)

BK/GN-4---------Power to O2 Sensor-------------------CONNECT TO PIN 3 WIRE (??????)

BK/GR-5---------GROUND ------------------ CONNECT TO BODY GROUND (manual says "not used")

BL/WT-6---------Oil Pressure---------------------------GAUGE CONNECTION (G ON SENDER)

RE/BK--7---------Relay Actuation, Fuel Pump--------DO NOT connect to LS1 harness (not C101-H?)

BL/YE--8---------Water Temp--------------------------GAUGE CONNECTION (G ON SENDER)

BL-----9---------Oil Pressure---------------------------IDIOT LIGHT (W ON SENDER)

BL/GN--10---------Water Temp-------------------------IDIOT LIGHT

EMPTY--11---------Spare------------------------------none

RE------12--------- BLANK ----------------------------NONE (EMPTY)

EMPTY--13---------Spare------------------------------none (RED/GN #13 S/B A/C Request)

EMPTY--14---------BLANK------------------------------NONE

Wes,

See above for changes. Info is for an 86. YOU MUST PULL THE #34 FUSE WHICH IS THE FUEL PUMP FUSE. A 15 AMP INLINE FUSE CAN BE INSTALLED BETWEEN THE PIN 3 AND PIN 4 WIRES.


Last edited by Bluemach1 on Fri Aug 20, 2010 11:15 am; edited 5 times in total

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Re: 14 Pin Connector - Check Please

Post  spence on Fri Aug 20, 2010 10:49 am

What does connecting pin #3 to pin #4 do?? I'm about to start this to, now I'm confused....

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Re: 14 Pin Connector - Check Please

Post  Bluemach1 on Fri Aug 20, 2010 1:05 pm

I dont know. I am hoping that one of the gurus here can enlight us! scratch

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Re: 14 Pin Connector - Check Please

Post  spence on Fri Aug 20, 2010 1:11 pm

I was going to use pin #3 for a 12v switched for my relays... Can I do that?

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Re: 14 Pin Connector - Check Please

Post  Bluemach1 on Sat Aug 21, 2010 9:02 pm

No takers? Come on guys I am counting on you!

Thanks,
Ted

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Re: 14 Pin Connector - Check Please

Post  944-LT1 on Sun Aug 22, 2010 1:33 am

Im currently only using 3 of the pins. Two for oil pressure and one for head temperature to stock gauge.

14 pin connector:
pin # function color

1 output to coil control not used
2 red/blue not used
3 main power used
4 black/green not used
5 fuel pump relay control used
6 oil pressure gauge blue/white used
7 start seloniod to computer not used
8 temp blue/yellow used
9 oil pressure switch blue used
10 temp blue/green used
11 empty
12 empty
13 AC compressor (maybe used)
14 empty

I tapped into the rear of the tachometer for the tach wire. I also trigger the fuel pump by the "fuel pump relay contol" from the computer to a independent relay. The starter and alternator trip wire are together in a harness at the firewall.

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Re: 14 Pin Connector - Check Please

Post  944-LT1 on Sun Aug 22, 2010 2:11 am

Do these wires match yours?


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Re: 14 Pin Connector - Check Please

Post  Bluemach1 on Sun Aug 22, 2010 11:38 am

Thanks 944-LT1.

So we agree that #4 is not used, AND not tied to #3.

In my application, I do plan on using the DME relay. Already purchased a brand new one so that I start fresh. Only cost about $15. Would #5 need to be ground for this application? I am not sure what the purpose of that is.

We agree that #7 is not used. I am sure that I got that tie in from Bridars 968 notes. I will let SSP know NOT to tie this to C101-H.

So in this configuration NOTHING gets tied into the GM ECU or Harness.

Something seems amiss.


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Re: 14 Pin Connector - Check Please

Post  944-LT1 on Sun Aug 22, 2010 2:53 pm

I decided to go through the schematic again...with a comb. This is what I found.

T21 Connector – 14 Pin Connector at Drivers Side Firewall

1 – GN – To Ignition Coil (Not Used)
2 – RD/BL – To Injectors from DME Relay pin 87 (Not Used)
3 – RD/YL – 12 VDC from DME Relay pin 87 to DME pins 35 and 18
4 – BK/GN – Fuel Pump/O2 Sensor (see notes)
5 – BK/GR – Earth from DME Relay pin 85b to DME pin 20 (see notes)
6 – BL/WT – To G on Oil Pressure Sensor
7 – RD/BK – Ignition Switch and Starter to DME pin 4
8 – BL/YL – To G on Water Temp Sensor
9 – BL – To WK on Oil Pressure Sensor
10 – BL/GN – To W on Water Temp Sensor
11 – (Not Used)
12 – (Not Used)
13 – RD/GN – DME – A/C Compressor (Not Used)
14 – (Not Used)

NOTES:
Pin 4: After the DME relay is energized, +12VDC flows from 87b of the DME relay G5 to fuse 34 and then braches off to the fuel pump and to Pin 4 of the T21 14 pin connector which powers the stock 944 oxygen sensor with +12VDC.

Pin 5: Terminal 85b (ground) of the DME relay goes to Pin 5 of the T21 connector and then to the DME pin 20.

Pin 7: This pin receives +12VDC during starting only (terminal 50 at ignition switch).
Pin 9: Oil pressure idiot light.
Pin 10: Water temperature idiot light.
Pin 8: Water temperature gauge.




So we agree that #4 is not used, AND not tied to #3.
See above notes on pin 4. Normally, you would want to isolate the fuel pump to the LS computer meaning using the LS computer "fuel pump relay control" wire to trigger the relay to turn on the fuel pump. Otherwise, pin 4 is just to power the O2 sensor.

In my application, I do plan on using the DME relay. Already purchased a brand new one so that I start fresh. Only cost about $15. Would #5 need to be ground for this application? I am not sure what the purpose of that is.
Pin 5 is from DME relay terminal 85b which is ground.

We agree that #7 is not used. I am sure that I got that tie in from Bridars 968 notes. I will let SSP know NOT to tie this to C101-H.
Pin 7 comes from ignition switch terminal 50 and recieves +12VDC during crank only to supply +12VDC to the starter solenoid and to pin 4 of the DME. I did not use this.

So in this configuration NOTHING gets tied into the GM ECU or Harness. Something seems amiss.
Not really. This connector simply interfaces between the stock 944 engine components such as oil pressure, temperature, AC and the DME. But now, it is barley used if at all.

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Re: 14 Pin Connector - Check Please

Post  Bluemach1 on Sun Aug 22, 2010 7:38 pm

Alright! Looking good. I was looking at the C101 functions. C101-D is "fuel pump relay control".

So, from your notes, only if I were to eliminate the stock DME relay and replace with a stand alone relay would I need to use pin #4 tied to C101-D? But in my case, using pin #4 is not necessary as it is only used in the circuit for O2 sensors.

Also, from your notes, pin #7 is not needed because the starter solenoid is handled by red wire on the "2 pin plug" (I presume that this is why you did not use it). No reason to use it? You have notes about about tying to pin #4 but not required?

Overall, it looks like the only thing that was not correct in "the manual" was that pin #5 should be ground (not "not used").

I know that I had some notes on the fuel pump and I know that there was a recent thread regarding that topic. Hopefully with using the stock DME relay and this pin configuration I will be good to go.

Thanks for your help and notes on this 944-LT1!!!

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Re: 14 Pin Connector - Check Please

Post  944-LT1 on Sun Aug 22, 2010 8:35 pm

Alright! Looking good. I was looking at the C101 functions. C101-D is "fuel pump relay control".
Yeah, so if you want to be rid of the DME, attach this wire to a 30/40A relay at terminal 85.


So, from your notes, only if I were to eliminate the stock DME relay and replace with a stand alone relay would I need to use pin #4 tied to C101-D? But in my case, using pin #4 is not necessary as it is only used in the circuit for O2 sensors.
Simply put, this is a location on where to tap into the fuel pump circuit in order to energize the fuel pump via LSx computer control. I myself have isolated the fuel pump circuit before the DME relay. I see no reason for two relays in the fuel pump circuit and do not want to use the expensive and often problematic DME relay...but rather a common and readily available bosch/tyco 30A relay. In reality, you are going to be adding a series of fuses and relays to your harness. So, you should dedicate such important circuits to their own independent relays.

Overall, it looks like the only thing that was not correct in "the manual" was that pin #5 should be ground (not "not used").
I dont have the manual handy but yes, only if you plan on utilizing the stock DME relay. If not, it is not needed. However, looking at the schematic, pin 5 is the ground wire to the DME relay at terminal 85b of the relay. However, it may already be grounded directly between the relay and T21 when, according to the schematic, it leaves central electric for some reason and then re-enters quite quickly. Laughing So it looks like it may be grounded at central electric already. Take a voltmeter and test pin 5 to the battery and see if you have 12vdc. If you do, the manual is correct and its not used. If its open, it will need to be grounded.
I know that I had some notes on the fuel pump and I know that there was a recent thread regarding that topic. Hopefully with using the stock DME relay and this pin configuration I will be good to go.
I think the majority of conversionists are trying to get away from using the DME relay all together. Laughing The last thing you want is to be on the side of the road due to a bad DME relay and no one around sells them. Shocked That would suck. You can fill your glove box with a 6-pack of bosch/tyco 30/40A relays for the cost of 1/2 a stock porsche DME relay. Laughing Laughing
Thanks for your help and notes on this 944-LT1!!!
No problem!

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Re: 14 Pin Connector - Check Please

Post  Bluemach1 on Sun Aug 22, 2010 9:36 pm

Ok, Ok, Ok,,,,, I keep trying to fight having to add in any new circuity, mainly because I have no idea what I am doing. I wanted to just plug and play.

However, this seems too easy to do.

New relay:
30 - 12v direct to battery with 15A fuse. Question, can this 12v came from the same 12v on pin #3. Since this is for fuel supply, does it make since to use a switched supply?

87 - where do I pick up 87 for the fuel pump? under the fuse panel on the existing 87 / 87B?

85 - can come from C101-D (or directly from PIN 9 on RED ECM plug)

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Re: 14 Pin Connector - Check Please

Post  944-LT1 on Mon Aug 23, 2010 12:27 am

Ok, Ok, Ok,,,,, I keep trying to fight having to add in any new circuity, mainly because I have no idea what I am doing. I wanted to just plug and play.
Laughing I know how you feel. I did it your way with the LT engine....sucked.
New relay:
30 - 12v direct to battery with 15A fuse. Question, can this 12v came from the same 12v on pin #3. Since this is for fuel supply, does it make since to use a switched supply?
Pin 3 is from 87 on the DME relay.....well, thats having two relays in one circuit which is redundant. But you can do that if you want....I guess. Laughing
87 - where do I pick up 87 for the fuel pump? under the fuse panel on the existing 87 / 87B?

According to the schematic, its a straight shot from the fuel pump to pin 4 at T21. But to check, simply pull the DME relay out of the fuse panel and apply +12vdc to pin 4. The pump should turn on. If so, yes, you can just hook up this wire to 87 on the new relay.
85 - can come from C101-D (or directly from PIN 9 on RED ECM plug)
Excellent! You got it!

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Re: 14 Pin Connector - Check Please

Post  spence on Mon Aug 23, 2010 7:59 am

Thanks for clearing this up... It sure takes alot of the guess work outta things!

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