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 Post subject: Re: Intalled NP231C 4LO Range switch wiring
PostPosted: Sat Apr 05, 2008 11:53 am 
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I get chills without my van.

Joined: Fri Jan 25, 2008 3:12 am
Posts: 98
Ok, did some more research, and I printed out the circuit descriptions and diagrams at work to share with you all. I wrote a simple diagram for the switch. There is one for 96-00 and one for 01-05.

Enjoy!
Image

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Brandon
Bay City, MI

1997 Astro LT 4x4 48,000 Miles,
Custom Lift: 3" body spacers, torsion keys,
4" leaf spring relocation mounts (by ME),
added a leaf spring from a 94 S10 blazer.
All this gives me 5-6 inches of lift.
General Grabber AT2 31X10.50R15
Custom fit Brush guard
Western 7' 6" plow pictures coming soon...
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1997 Buick Century 198,000 miles


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 Post subject: Re: Intalled NP231C 4LO Range switch wiring
PostPosted: Sun Apr 06, 2008 11:54 am 
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Joined: Wed Feb 07, 2007 9:22 pm
Posts: 694
Location: Pioneer Valley WMass
Good stuff... :supz:
Congradulations, and thanks for the info Brandon =D>

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1999 LS AWD 3" Lift,4.10's,Snowplow,9500lb Ramsey winch


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 Post subject: Re: Intalled NP231C 4LO Range switch wiring
PostPosted: Tue Nov 15, 2011 1:46 am 
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I sleep in my van

Joined: Wed May 18, 2011 11:38 pm
Posts: 577
Location: 7000' in the Mountains of California
This works w/o a TCCM right? Can anyone point me to connector 4, terminal 23 of the PCM on my '98???

Great info, thanks

_________________
1998 AWD/4WD
4" lift, 31x10.50's, NP 242j/c hybrid, 4.10 gears, S10 front disconnect, trans cooler, rock sliders, bed and passenger swivel chair
dirt bag camping rig
1981 Toyota 4x4 pu
1974 John Deere 710
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 Post subject: Re: Intalled NP231C 4LO Range switch wiring
PostPosted: Wed Nov 16, 2011 4:04 am 
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I sleep in my van

Joined: Wed May 18, 2011 11:38 pm
Posts: 577
Location: 7000' in the Mountains of California
ok, this helps :dunce:

"ECU, ECM, PCM, VCM ... all abbreviations for the same thing.".

_________________
1998 AWD/4WD
4" lift, 31x10.50's, NP 242j/c hybrid, 4.10 gears, S10 front disconnect, trans cooler, rock sliders, bed and passenger swivel chair
dirt bag camping rig
1981 Toyota 4x4 pu
1974 John Deere 710
Image


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 Post subject: Re: Intalled NP231C 4LO Range switch wiring
PostPosted: Wed Nov 16, 2011 1:24 pm 
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Joined: Sat Sep 09, 2006 10:35 pm
Posts: 4429
Location: New Haven, NY
The PCM is mounted right beside the battery. Not sure which connector is C4 and yes it will work without a TCCM since your 98 doesn't have one.

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Current rides:
2013 Toyota Tundra DC 4x4
2008 Dodge Nitro 4x4
2005 Nissan Sentra 1.8S Special Edition

Mileage spreadsheet

Vans owned:
1986 Safari 2.5L 4 speed manual - scrapped
1995 Astro 2WD conversion 4.11 posi, shift kit, DHC rock rails - sold to Skippy
1998 Astro 4x4 D44, D60, NP231, full hydraulic system with 9k# Milemarker winch and snow plow - sold to Lockdoc
2003 Astro AWD all stock - traded for a 3/4 ton truck
2005 AWD, 4.10's - sold to skippy


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 Post subject: Re: Intalled NP231C 4LO Range switch wiring
PostPosted: Wed Nov 16, 2011 2:34 pm 
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I sleep in my van

Joined: Wed May 18, 2011 11:38 pm
Posts: 577
Location: 7000' in the Mountains of California
Thanks. I was looking for a PCU all thru the manual to no avail, ECU on the other hand.... :rolleyes:. I should be able to wire it directly to the low range terminals on the tc selector switch. \:D/

This seems like a HUGE improvement, glad to have stumbled upon it.

_________________
1998 AWD/4WD
4" lift, 31x10.50's, NP 242j/c hybrid, 4.10 gears, S10 front disconnect, trans cooler, rock sliders, bed and passenger swivel chair
dirt bag camping rig
1981 Toyota 4x4 pu
1974 John Deere 710
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 Post subject: Re: Intalled NP231C 4LO Range switch wiring
PostPosted: Wed Nov 16, 2011 6:02 pm 
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I get chills without my van.
User avatar

Joined: Thu Feb 25, 2010 8:54 pm
Posts: 56
Location: salt lake city UT
keep us posted photo_van i would like to see how this turns out... w/pics of course :muhaha:

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99 astro awd ls package, 3" bodylift, alarm system w/remote start, tinted windows, tranny cooler, modded air intake, bigger power steering cooler, hood struts, westin pushbar, hypertech tuned running on 91 octane, Hypertech 160* thermostat, 1 ton calipers and pads (not much of a difference as i expected)30" tall tires 245-65-17 on jeep wheels
here is a link to my pics: http://s795.photobucket.com/home/unrreal/allalbums


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 Post subject: Re: Intalled NP231C 4LO Range switch wiring
PostPosted: Thu Nov 17, 2011 2:03 am 
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I sleep in my van

Joined: Wed May 18, 2011 11:38 pm
Posts: 577
Location: 7000' in the Mountains of California
Will do. I've got the NP 242C built and waiting in the shed (and pics in the computer). Just need the van to quit breaking so I have time to install!

_________________
1998 AWD/4WD
4" lift, 31x10.50's, NP 242j/c hybrid, 4.10 gears, S10 front disconnect, trans cooler, rock sliders, bed and passenger swivel chair
dirt bag camping rig
1981 Toyota 4x4 pu
1974 John Deere 710
Image


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 Post subject: Re: Intalled NP231C 4LO Range switch wiring
PostPosted: Mon Nov 21, 2011 3:06 am 
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I sleep in my van

Joined: Wed May 18, 2011 11:38 pm
Posts: 577
Location: 7000' in the Mountains of California
Conector 4 is the BLACK one on the VCM according to the manual.

Here's the end view
Attachment:
_MG_7976.jpg
_MG_7976.jpg [ 81.95 KiB | Viewed 2025 times ]

Terminal 23 should be unused

_________________
1998 AWD/4WD
4" lift, 31x10.50's, NP 242j/c hybrid, 4.10 gears, S10 front disconnect, trans cooler, rock sliders, bed and passenger swivel chair
dirt bag camping rig
1981 Toyota 4x4 pu
1974 John Deere 710
Image


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