Neutral safety switch 3 wire colors/or bypass -
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Unread 06-01-2011, 07:18 PM   #1
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2001 WJ 
Join Date: Apr 2011
Location: Elyria, Ohio
Posts: 21
Wj Neutral safety switch 3 wire colors/or bypass

Recently I had a Park neutral switch going bad code on my 2001 WJ Grand Cherokee 4.0 I bought the new switch, but when I went to change it out, the 3 wires on the connector are all exposed and frayed/melted. So I went to my local Jeep dealership to get a new CONNECTOR, but they can't get them. So I went to my local junkyard... no WJ's. I cut the end of the connector off, tried to splice in some fresh wires and heatshrunk the exposed wires. Upon rehook up, it will not start. I don't know if I mixed up the order of the three wires or what. Kinda hard to tell the exact colors of the wires (being under the car and covered in grease), but I think they are GREEN, YELLOW striped with unknown color, and TAN. Am I close here? I can't find any wiring diagram for it in the back of the Haynes manual. I'm guessing when I reconnected it all, that it's either wrong, or the connector is so frayed that it's not getting any juice. I've read about bypassing it by grounding the center wire, but I don't know which one was the center wire now. If I do bypass it, will I have problems with my backup lights? Will my check engine light turn off finally?
I noticed that when you snap the connector back on, there is no catch/stop so is it possible to put it on backwards/upside down?
I need help here. This is driving me crazy. Anyone got a diagram with color codes or advice about bypassing it?

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Unread 04-03-2012, 06:59 PM   #2
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Join Date: Dec 2005
Location: Winnipeg Manitoba
Posts: 117
exact same problem. replaced frayed wires after getting the code and now it wont fire. Any ideas anyone??
she's a real grand Rio Grande: 4" RE, 35" pro comp's, trail damage
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Unread 05-01-2012, 12:39 AM   #3
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2001 WJ 
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Location: 39 12' N 78 10' W, Junction Gritty, KS
Posts: 577
Did you have any luck I'm doing that tomorrow and could really use a reference. Thanks
2005 Grand Cherokee Limited - 5.7 [COLOR="Red"]HEMI[/COLOR] - QDII - 2" Rough Country BB - AFE Stage 2 CAI - Monkey Navigated - Rear Shackle

2001 WJ- SOLD

[QUOTE=mrJ]It's a Jeep, it's not supposed to work right all the time.[/QUOTE][/CENTER]
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Unread 05-01-2012, 06:44 AM   #4
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2001 WJ 
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This image is from the 01 FSM. In case you need a translation: VT/BK = violet/black, BR/YL - brown/yellow, and WT/TN = white/tan.
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Unread 05-04-2012, 01:00 PM   #5
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1997 ZJ 
Join Date: May 2011
Location: Regina, Saskatchewan
Posts: 81
Awesome, this thread isnt 2 years old. I have a 1997 Grand Cherokee 4.0l. I did a transmission swap to a ax15. Standards dont have a NSS. My 42RE has the 3-pin/3-wire NSS that goes to the back up lights as well. Which wire do I ground to start and have my Jeep run? The Middle one, as per your diagram?

Thanks in advance!
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