Confused about PNP switch signal in 04 Safari

Confused about PNP switch signal in 04 Safari

Postby gavio [OP] » March 4th 2014, 11:58pm

Hi AStrofarians:

So I'm finally about to hook up my np233 t-case, and everything makes sense to me except one thing - One of the inputs I need is the 12v in Park and Neutral signal.... I've pored over my FSM and it seems kind of vague about it....

In one spot it looks like there's a green wire coming off the PNP (Range) switch on the tranny that is indicated as Park/Neutral signal.... but is also indicated as Backup Lamp supply voltage :?

In another place, it says that spot on the range switch isn't used at all.... :? :?

WTH?????? :? :? :?

How can it be all those at once? Or am I missing something obvious?

Anybody know where to find the signal I'm looking for?
2004 Safari, 4 inch lift, NP-231 t-case, 255/70/16 BFGs, home-brewed pop top, full camper, on-board propane, lions and tigers and bears, oh my.....
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gavio
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Re: Confused about PNP switch signal in 04 Safari

Postby grandamle91 » March 5th 2014, 2:24am

I'm trying to find the damn papers I had when I did my engine swap and can't find them.


Ha I found them
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-Evan
MONSTRO 97 Chevy Astro 346k
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NP262
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Tuned for e85
Headers 4in Exhaust
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98 Pontiac Grand Prix GTP 253k
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Re: Confused about PNP switch signal in 04 Safari

Postby gavio [OP] » March 5th 2014, 2:52am

Thanks you for the help, grand..... Mine doesn't look like that at all (the later ones are all one plug, and missing a couple things)....but there are enough similarities....

I see now that there's actually 2 light green wires (gotta appreciate the clarity), one for backup lamps and one for PN signal.....I think that one's probably the one I'm looking for (pin B, circuit 275) - any idea where that goes to?

I'd like to find a better (read: more accessible) place to track it down than all the way down under the car.... I haven't found any circuits that include it....or is it unused, as indicated on one page of my manual?
2004 Safari, 4 inch lift, NP-231 t-case, 255/70/16 BFGs, home-brewed pop top, full camper, on-board propane, lions and tigers and bears, oh my.....
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Re: Confused about PNP switch signal in 04 Safari

Postby grandamle91 » March 5th 2014, 3:00am

I'll look through my service manual, forgot they changed

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-Evan
MONSTRO 97 Chevy Astro 346k
LQ9
4L80E
NP262
Full float 14 bolt 3.73
Tuned for e85
Headers 4in Exhaust
3500 spindles and hubs
285\85-16
98 Pontiac Grand Prix GTP 253k
***Removed Dead Image***
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Re: Confused about PNP switch signal in 04 Safari

Postby gavio [OP] » March 5th 2014, 3:39am

That'd be awesome, hopefully it's more clear than it is in the 04 manual....
2004 Safari, 4 inch lift, NP-231 t-case, 255/70/16 BFGs, home-brewed pop top, full camper, on-board propane, lions and tigers and bears, oh my.....
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Re: Confused about PNP switch signal in 04 Safari

Postby grandamle91 » March 5th 2014, 4:27am

Here you go buddy

Pin Wire Color Circuit No. Function
1 DK GRN 1433 Clutch Start Switch Signal
2-3 -- -- Not Used
4 YEL 772 Transmission Range Switch Signal B
5 BLK/WHT 771 Transmission Range Switch Signal A
6 GRY 773 Transmission Range Switch Signal C
7 BLK/WHT 451 Ground
8 WHT 776 Transmission Range Switch Signal P
9 LT GRN 275 Park Neutral Position Switch Signal
10 GRY 1524 Back-Up Lamp Supply Voltage
11 PNK 839 Ignition 1 Voltage
12 PPL 639 Ignition 1 Voltage
Attachments
transmissionrangeswitchharnessside.jpg
-Evan
MONSTRO 97 Chevy Astro 346k
LQ9
4L80E
NP262
Full float 14 bolt 3.73
Tuned for e85
Headers 4in Exhaust
3500 spindles and hubs
285\85-16
98 Pontiac Grand Prix GTP 253k
***Removed Dead Image***
User avatar
grandamle91
V8 Swap Achievement
V8 Swap Achievement
Firing on 3 Cylinders (L2)
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Years of Membership: grandamle91 has been a member for 12 full yearsgrandamle91 has been a member for 12 full yearsgrandamle91 has been a member for 12 full yearsgrandamle91 has been a member for 12 full yearsgrandamle91 has been a member for 12 full yearsgrandamle91 has been a member for 12 full yearsgrandamle91 has been a member for 12 full yearsgrandamle91 has been a member for 12 full yearsgrandamle91 has been a member for 12 full yearsgrandamle91 has been a member for 12 full yearsgrandamle91 has been a member for 12 full yearsgrandamle91 has been a member for 12 full years
Posts: 1399
Topics: 137
Images: 2
Joined: April 2008
Location: Watertown, SD
Gender: Male
Alias (AKA): Evan
Van Model Year: 1997
Van Make/Model: Chevrolet Astro
Extra Info: LT 6.0 V8 4L80E NP2

Re: Confused about PNP switch signal in 04 Safari

Postby gavio [OP] » March 5th 2014, 11:47pm

Thanks, man, I appreciate the assist....

I poked around underneath for a while and found the light green wire at the tranny - it only gives a signal in Park (not in Neutral) but whatever....

Then by accident, I was looking at another schematic in my FSM, and there was a green wire going to the brake switch - checked it out, and lo and behold, there it was.... The PNP signal just runs to the brake switch without hitting the PCM along the way..... Strange, but there ya go....

That is a whole lot more accessible than down by the tranny, though so :dance:
2004 Safari, 4 inch lift, NP-231 t-case, 255/70/16 BFGs, home-brewed pop top, full camper, on-board propane, lions and tigers and bears, oh my.....
Original Poster [OP]
User avatar
gavio
Firing on 2 Cylinders (L2)
Firing on 2 Cylinders (L2)
Years of Membership: gavio has been a member for 7 full yearsgavio has been a member for 7 full yearsgavio has been a member for 7 full yearsgavio has been a member for 7 full yearsgavio has been a member for 7 full yearsgavio has been a member for 7 full yearsgavio has been a member for 7 full years
Posts: 1230
Topics: 77
Images: 4
Joined: March 2013
Gender: Male
Alias (AKA):
Van Model Year: 2004
Van Make/Model: GMC Safari
Extra Info: AWD


 
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