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 Post subject: Re: How to wire up a NP 236 in place of a 136.
PostPosted: Thu Jun 08, 2017 6:41 am 
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I finally get the smurf thing

Joined: Sun Jul 26, 2015 8:25 pm
Posts: 119
Location: Charleston SC
Quote:
BTW, do you have two connectors, blue and green on yours? You seem to be saying ours are the same. I think the source of the confusion may be this diagram you posted earlier. On the right side it shows a "Vehicle Control Module" and pin 23 on Connector 4...


WOW!!! How did I miss that??!! That diagram is for the older PCM's, which I guess were called "VCM's", that used the older style 4 connectors instead of our two connector 80pin setups.
And yes, I have the blue and green connectors on my '03. SOOOOOO, you'll connect F7-C1 from the TCCM TO pin #16-C2 connector on your PCM.

My apologies for this oversight :dunce: I will have to see if I can find the correct Schematic and do an update. If you can find it on ESI that you are downloading, maybe you can share it?

Good catch on my booboo!! :cheers:

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O3 Astro 4X4
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Dropped front IFS axle
Journeys rear spring hangers and shackles, S-10 leaf springs, 2" body lift
255/70-16 BFG KO2's on 16x8 Fuel Revolvers


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 Post subject: Re: How to wire up a NP 236 in place of a 136.
PostPosted: Sat Jun 10, 2017 7:24 am 
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I am merely driving my van
I am merely driving my van

Joined: Tue Jun 06, 2017 3:55 pm
Posts: 7
Location: Eastern Washington
racrx7 wrote:
WOW!!! How did I miss that??!! That diagram is for the older PCM's, which I guess were called "VCM's", that used the older style 4 connectors instead of our two connector 80pin setups.
And yes, I have the blue and green connectors on my '03. SOOOOOO, you'll connect F7-C1 from the TCCM TO pin #16-C2 connector on your PCM.

My apologies for this oversight :dunce: I will have to see if I can find the correct Schematic and do an update. If you can find it on ESI that you are downloading, maybe you can share it?

Good catch on my booboo!! :cheers:


You, sir, have no need to apologize. I can't thank you enough for this awesome info.

Unfortunately the torrent download for the GM ESI stalled due to lack of seeders, can't find dvd on ebay either. Ah well, we know what goes where... we don't necessarily need a picture.

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2005 Astro 4x4, 4-5" lift, 31" Tires, np236 Transfer Case, Trans-Go Shift Kit, Hayden Tranny Cooler, Ultragauge MX


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 Post subject: Re: How to wire up a NP 236 in place of a 136.
PostPosted: Sun Jun 11, 2017 10:22 pm 
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I sleep in my van

Joined: Sun Jan 13, 2008 5:23 am
Posts: 509
Hi Everyone,

Wow, the np236 looks like the way to go.
I have 2003 Astro AWD with 2" lift.
I have a np233 that I was going to install to get low range.'maybe I will go the pic n pull to get np236.

AP


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 Post subject: Re: How to wire up a NP 236 in place of a 136.
PostPosted: Wed Jun 14, 2017 7:10 am 
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I am merely driving my van
I am merely driving my van

Joined: Tue Jun 06, 2017 3:55 pm
Posts: 7
Location: Eastern Washington
racrx7 wrote:
If you can find it on ESI that you are downloading, maybe you can share it?


It downloaded after all...

Here's the schematic for a 2005 Blazer with NV236... It appears to have the same connectors on the PCM as we do and again confirms Pin 16 on Connector 2 (Green)


Attachments:
05Blazer_TCCM_to_Axle_and PCM.jpg
05Blazer_TCCM_to_Axle_and PCM.jpg [ 120.29 KiB | Viewed 80 times ]

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2005 Astro 4x4, 4-5" lift, 31" Tires, np236 Transfer Case, Trans-Go Shift Kit, Hayden Tranny Cooler, Ultragauge MX
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 Post subject: Re: How to wire up a NP 236 in place of a 136.
PostPosted: Wed Jun 14, 2017 7:41 am 
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I am merely driving my van
I am merely driving my van

Joined: Tue Jun 06, 2017 3:55 pm
Posts: 7
Location: Eastern Washington
I am totally geeking out over this ESI info.

The 4wd Lo signal to the PCM:

2005-2003 are 2 connectors, blue and green, Pin 16 on Connector 2 (green) as discussed
2002-2001 are 2 connectors, blue and red, Pin 16 on Connector 2 (red)
2000-1999 are 4 connectors, blue, red, clear, black, Pin 23 on Connector 4 (black) as your previous diagrams showed
Before that it looks like Pin 19 on connector 4 on the VCM/PCM but it doesn't specify the connector color

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2005 Astro 4x4, 4-5" lift, 31" Tires, np236 Transfer Case, Trans-Go Shift Kit, Hayden Tranny Cooler, Ultragauge MX


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 Post subject: Re: How to wire up a NP 236 in place of a 136.
PostPosted: Wed Jun 14, 2017 10:13 am 
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I finally get the smurf thing

Joined: Sun Jul 26, 2015 8:25 pm
Posts: 119
Location: Charleston SC
curtperry wrote:
racrx7 wrote:
If you can find it on ESI that you are downloading, maybe you can share it?


It downloaded after all...

Here's the schematic for a 2005 Blazer with NV236... It appears to have the same connectors on the PCM as we do and again confirms Pin 16 on Connector 2 (Green)


Excellent! Thanks for posting that schematic \:D/ I have it on paper just not on digital

_________________
O3 Astro 4X4
Image
Dropped front IFS axle
Journeys rear spring hangers and shackles, S-10 leaf springs, 2" body lift
255/70-16 BFG KO2's on 16x8 Fuel Revolvers


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 Profile  
 
 Post subject: Re: How to wire up a NP 236 in place of a 136.
PostPosted: Wed Jun 14, 2017 10:18 am 
Offline
I finally get the smurf thing

Joined: Sun Jul 26, 2015 8:25 pm
Posts: 119
Location: Charleston SC
curtperry wrote:
I am totally geeking out over this ESI info.

The 4wd Lo signal to the PCM:

2005-2003 are 2 connectors, blue and green, Pin 16 on Connector 2 (green) as discussed
2002-2001 are 2 connectors, blue and red, Pin 16 on Connector 2 (red)
2000-1999 are 4 connectors, blue, red, clear, black, Pin 23 on Connector 4 (black) as your previous diagrams showed
Before that it looks like Pin 19 on connector 4 on the VCM/PCM but it doesn't specify the connector color



Excellent info!! Thanks for adding to this thread :guitar:
The different color connectors from 01-03 are to differentiate a network protocol change, that I understand, and we're carried across all models. :cheers:

_________________
O3 Astro 4X4
Image
Dropped front IFS axle
Journeys rear spring hangers and shackles, S-10 leaf springs, 2" body lift
255/70-16 BFG KO2's on 16x8 Fuel Revolvers


Top
 Profile  
 
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