Reply
 
Thread Tools Display Modes
 
Old 09-27-2016, 11:45 PM   #1
Senior Member
 
expeditionnw's Avatar
 
Join Date: Feb 2016
Location: PDX
Posts: 118
What are these ECM pins for?

1999 E350 superduty 7.3 van....Getting started on my Np273 E shift wire up. While pulling pinouts for everything involved, I discovered a few odd items in the PCM.

Pin#4: "drive line disconnect"

Ive been looking for a clean source for a neutral gear signal and keep coming back to this. interestingly, on the F series, this spot is a "neutral gear switch" So whats the driveline disconnect circuit?

Pin#14: "4x4 tap"

What do I hook this to to get 4wd??? that would have saved me tons! But seriously, could it be that the pcm is programmed for 4x4 indicator lights or the like?

Pin#19: "CTO Tap"

I believe this stands for 'Clean Tach Output' which would also be amazing.
__________________

expeditionnw is offline   Reply With Quote
Old 09-28-2016, 08:39 AM   #2
Senior Member
 
Pntyrmvr's Avatar
 
Join Date: Jul 2011
Location: GTA, Ontario
Posts: 894
Hi,

Having just spent a lifetime poring over service manuals and wiring diagrams for my project I`ll proffer a few suggestions:

-4 DLD was likely to disconnect a front axle from engagement like shift on the fly systems use

-14 engages 4x4- as above for shift on the fly

-19 clean tach would let you use a traditional tach with the computer in your beast

Now just because the wiring is listed at the PCM doesn`t mean the harness will have it. Lots of PCMs were used in a variety of vehicles. Some 4x4 auto, 4x4 stick, and 2wd.

You`ll also need the wiring and such on the interior to make it all work. With the dearth of spare dash space I think you`d be better off with a small toggle switch for 4wd and another for 4 Lo. Wire them seperately from the PCM and avoid having to play with the PCM wiring and plugs.

Regards,

Gavin
__________________

__________________
"Talk is cheap. Whiskey costs money."
Pntyrmvr is offline   Reply With Quote
Old 09-28-2016, 08:51 AM   #3
Senior Member
 
expeditionnw's Avatar
 
Join Date: Feb 2016
Location: PDX
Posts: 118
Thanks gavin, Its interesting because the van ECM is unique to the van (or so I thought).

i understand that the wiring probably wont be there, but thought it interesting that the ecm would support it.

Now, do you know what #4 and #14 pin signals look like? Or what input triggers them?

I am using all OE ford electronics to make this shift. No toggle switches for me, when its done I want it to look factory!
expeditionnw is offline   Reply With Quote
Old 09-28-2016, 09:12 AM   #4
Senior Member
 
Pntyrmvr's Avatar
 
Join Date: Jul 2011
Location: GTA, Ontario
Posts: 894
EDIT



Hi,

I`d find a wiring diagram that has all the factory wiring for the 4x4 switches you want to use and then back track from there.

I took me forever to figure out that a signal I wanted was providing a ground not a live 12 V feed. DON`T use a test light to figure that one out. They can draw too much on PCM circuits and do damage. Force yourself to figure out the wiring diagram and then once comfortable use a voltmeter to verify.

Wiring diagrams are your new best friend. Embrace them!

Edit added: If you want the PCM to handle the switching of the 4wd you'll have to ensure yours is programmed to do it or else find another unit. Do that first to save time. It might just be cheaper and faster to use the factory switches for OEM visuals with your own relays and wiring behind the scenes.

Lastly is your PCM a Canbus setup or the older style... Canbus is a whole different world. All zeroes and ones...

Regards,

Gavin
__________________
"Talk is cheap. Whiskey costs money."
Pntyrmvr is offline   Reply With Quote
Old 09-28-2016, 09:45 AM   #5
Senior Member
 
expeditionnw's Avatar
 
Join Date: Feb 2016
Location: PDX
Posts: 118
I am pre canbus. I have all my diagrams for my componantry, i'm just curious how those pinouts actually function.
expeditionnw is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Powered by vBadvanced CMPS v3.2.3
Disclaimer:

This website is not affiliated with or endorsed by Sportsmobile SIP or any of its affiliates. This is an independent, unofficial site.


All times are GMT -6. The time now is 08:55 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.