Neutral Safety Switch Bypass

Neutral Safety Switch Bypass

Postby grandamle91 [OP] » November 16th 2011, 8:03am

How can I bypass my switch so I can start my 97 Astro and get it back home.
-Evan
MONSTRO 97 Chevy Astro 346k
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4L80E
NP2
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
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Re: Neutral Safety Switch Bypass

Postby AWDASTROVAN1999 » November 16th 2011, 1:06pm

Start it in Neutral ..

also Try keeping the key on and try to move the shift lever slowley till you hit a connector
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Re: Neutral Safety Switch Bypass

Postby grandamle91 [OP] » November 16th 2011, 5:11pm

The switch is completely dead, only shows PRND321 with no selector
-Evan
MONSTRO 97 Chevy Astro 346k
LQ9
4L80E
NP2
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
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Re: Neutral Safety Switch Bypass

Postby Phantom » November 16th 2011, 5:40pm

Om the switch jump the pink wire to the yellow wire , or green , some years have yellow some have green , there are about 4-5 fuses for the neutral safety switch and ignition circuit , check those to make sure they are good
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Re: Neutral Safety Switch Bypass

Postby grandamle91 [OP] » November 16th 2011, 7:55pm

Thanks i'll give it a look, the fuses are all good
-Evan
MONSTRO 97 Chevy Astro 346k
LQ9
4L80E
NP2
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
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Re: Neutral Safety Switch Bypass

Postby grandamle91 [OP] » November 18th 2011, 4:33pm

Well I got it bypassed, Got and got the new one on but now I need a dirgram all my wires were broke, the new plug is off my 97 blazer but the wiring is different
-Evan
MONSTRO 97 Chevy Astro 346k
LQ9
4L80E
NP2
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
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Re: Neutral Safety Switch Bypass

Postby Phantom » November 18th 2011, 5:03pm

What are the colors of the wiring on your astro plug ?

what are the colors on your 97 blazer plug ?

Did you swap the switch from the blazer onto the astro , or just the plug?

Looking at a diagram for a 96 blazer the purple wire comes from the fuse box and the yellow wire goes to the stater relay

On the 96 Astro the pink wire comes from the fuse box
Last edited by Phantom on November 18th 2011, 8:08pm, edited 1 time in total.
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Re: Neutral Safety Switch Bypass

Postby grandamle91 [OP] » November 18th 2011, 7:48pm

-Evan
MONSTRO 97 Chevy Astro 346k
LQ9
4L80E
NP2
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
Image
Original Poster [OP]
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Re: Neutral Safety Switch Bypass

Postby Phantom » November 19th 2011, 12:22am

They look a lot alike , with subtle differences
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Re: Neutral Safety Switch Bypass

Postby grandamle91 [OP] » November 19th 2011, 6:17am

That helped alittle, but i need to know the rest of the Switches wires
-Evan
MONSTRO 97 Chevy Astro 346k
LQ9
4L80E
NP2
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
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Re: Neutral Safety Switch Bypass

Postby chevymaherchevymaher is online! » November 19th 2011, 6:22am

Instead of workin on my car tomorrow.I get to do this on my nieces lumina. Neutral switch override surgery. And tag team a axle bearing on a tahoe.Its always something.
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Re: Neutral Safety Switch Bypass

Postby Phantom » November 19th 2011, 6:34am

It would be so much easier if you bought a new pigtail for the van , or go to the salvage yard and get one from a van there , the way the wiring is done on the blazer is very close to the astro , but there are some differences , depends on how much time you want to invest verses getting a pigtail designed for an astro .. perhaps if you can identify which switches you refer refer to ,I may be able to trace them , but I don't have time to make out a cross reference chart ; as far as the neutral safety switch there is only a couple of those wires that actually operate the switch it is power and ground in and out , the other wires are for the other things nearby , the TCC , VSS ,shift solenoids etc etc
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Re: Neutral Safety Switch Bypass

Postby grandamle91 [OP] » November 19th 2011, 5:27pm

$100 bucks for a pigtail is rape, Junk yards around here are rednecks that charge more then new. I'll just park it and drive my car, till i can bend over at the parts store...lol

Well I went to advance for the hell of it and looked at the part and all the wires are grey, that won't do any good
-Evan
MONSTRO 97 Chevy Astro 346k
LQ9
4L80E
NP2
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
Image
Original Poster [OP]
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grandamle91
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Re: Neutral Safety Switch Bypass

Postby Phantom » November 19th 2011, 6:21pm

grandamle91 wrote:$100 bucks for a pigtail is rape, Junk yards around here are rednecks that charge more then new. I'll just park it and drive my car, till i can bend over at the parts store...lol

Well I went to advance for the hell of it and looked at the part and all the wires are grey, that won't do any good

All the new ones have gray wires it seems , take your old connector hold it next to the new connector making sure that they face the same direction . like the clip facing same direction , then note color of wire in order rank from one side to the other ,
if a red wire on old connector is in position all the way to the right side , then take the gray wire on new connector that is in the same location as the red wire on the old connector and connect that gray wire to the red wire on the van harness that formerly was connected to the red wire on old connector . do this one at a time so you can be sure that you got them all back to the correct original positions, You can do this with your other connector from the blazer , just forget about the colors of the wires on the connector , and match up pin locations, this connector was used on about a dozen GM vehicles and some had a different wing scheme , but as long as you have the old connecter and match up the pins correctly , the color of the wire won't matter .
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Re: Neutral Safety Switch Bypass

Postby grandamle91 [OP] » November 19th 2011, 9:55pm

The wires on my plug were damaged by snow
-Evan
MONSTRO 97 Chevy Astro 346k
LQ9
4L80E
NP2
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
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Original Poster [OP]
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Re: Neutral Safety Switch Bypass

Postby Phantom » November 19th 2011, 10:00pm

grandamle91 wrote:The wires on my plug were damaged by snow

I am curious , how did ice and snow damage the connector so bad that you are unable to tell what colors the wires are coming out of the plug?

take your old connector hold it next to the new connector making sure that they face the same direction . like the clip that locks it in place with 4 pins facing downward like in the pic

then note color of wire in order rank from one side to the other ,

if a red wire on old connector is in position all the way to the right side , then take the gray wire on new connector that is in the same location as the red wire on the old connector and connect that gray wire to the red wire on the van harness that formerly was connected to the red wire on old connector

. do this one at a time so you can be sure that you got them all back to the correct original positions, just forget about the colors of the wires on the connector , and match up pin locations,

this connector was used on about a dozen GM vehicles and some had a different wing scheme , but as long as you have the old connecter and match up the pins correctly , the color of the wire won't matter
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Re: Neutral Safety Switch Bypass

Postby grandamle91 [OP] » November 20th 2011, 6:28am

Wires were old brittle and the ice and snow pulled them right out of the socket, I really need to invest in some shields if i'm going to keep plowing. Can some one take a picture of theres? Thats all i need
-Evan
MONSTRO 97 Chevy Astro 346k
LQ9
4L80E
NP2
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
Image
Original Poster [OP]
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grandamle91
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Re: Neutral Safety Switch Bypass

Postby Phantom » November 20th 2011, 12:55pm

I don't recall what thread it was but I think Jasen posted a pic of his , on his 97 about a month ago , i think at least half of the wires were easy to see ,,get is narrowed down to a couple and should be able to figure out the rest with the diagram,,,or can you take pics of the connectors that you have that show where the wires are located on each connector that you have , lay them out as described above with both front and back pics with connectors side by side
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Re: Neutral Safety Switch Bypass

Postby grandamle91 [OP] » November 21st 2011, 5:17pm

Ya i saw he's it just to hard to tell wire colors
-Evan
MONSTRO 97 Chevy Astro 346k
LQ9
4L80E
NP2
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
Image
Original Poster [OP]
User avatar
grandamle91
250k+ Miles
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Firing on 3 Cylinders (L2)
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Extra Info: LT 6.0 V8 4L80E NP2


 
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