2001 jeep grand cherokee neutral safety switch bypass

2001 jeep grand cherokee neutral safety switch bypass
October 17th, 2007, 07:24

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Re: Bypass Neutral Safety Switch????


Assuming you get ignition, but no crank when you turn the key, the NSS is a suspect. Remember, though that the NSS is not involved if it cranks but doesn't start, and also not involved if you get no sign of ignition on. Its function here is only to interrupt the ground path to the starter relay.

Yes, you can bypass it to start, by finding the correct terminal and grounding it, either at the switch or at the starter relay itself.

But if it's just a dirty NSS, usually you can temporarily get going by starting in neutral rather than park. Remember that there's a reason it's called a "safety" switch, so if you bypass, fix it ASAP.

I think there are a number of threads here on which terminals are which. However, if the NSS is really bad, it might also affect transmission behavior and backup lights, because it's more than just a safety switch on this model.

If it really is the NSS, the directions for removing it and cleaning it are worth big money! Be very careful removing it if it's corroded. Take your time and don't pry the aluminum shaft of the switch apart. Check threads here, and you'll find many hints for getting a stubborn one off. This is a very expensive part, and even if you're used to mechanics' wages for your work, it's worth more than a couple of hours of your time to get off whole!

2001 jeep grand cherokee neutral safety switch bypass

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So my NSS has gone bad and I was looking for a work around to it. I was unable to find a write up for creating a bypass so I decided to make one of my own...

M Flores

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How to bypass the Neutral Safety Switch

2001 jeep grand cherokee neutral safety switch bypass
11-21-2009, 09:22 PM

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2001 jeep grand cherokee neutral safety switch bypass
How to bypass the Neutral Safety Switch


Is there anyway to bypass the Neutral Safety Switch on a 92 4.0?

2001 jeep grand cherokee neutral safety switch bypass
 

2001 jeep grand cherokee neutral safety switch bypass
11-21-2009, 09:58 PM

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2001 jeep grand cherokee neutral safety switch bypass


Quote:

Originally Posted by BOBO1234

2001 jeep grand cherokee neutral safety switch bypass

Is there anyway to bypass the Neutral Safety Switch on a 92 4.0?

what are you trying to accomplish?

2001 jeep grand cherokee neutral safety switch bypass
 

2001 jeep grand cherokee neutral safety switch bypass
11-21-2009, 10:09 PM

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2001 jeep grand cherokee neutral safety switch bypass


The occasional not wanting to start in park and reverse lights not working. I took it off to to take it apart and clean it and it looked like someone else had allready tried that and pryed on the back of it to get it off and cracked the plastic housing.

2001 jeep grand cherokee neutral safety switch bypass
 

2001 jeep grand cherokee neutral safety switch bypass
11-21-2009, 10:11 PM

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2001 jeep grand cherokee neutral safety switch bypass


Quote:

Originally Posted by BOBO1234

2001 jeep grand cherokee neutral safety switch bypass

The occasional not wanting to start in park and reverse lights not working. I took it off to to take it apart and clean it and it looked like someone else had allready tried that and pryed on the back of it to get it off and cracked the plastic housing.

I have the same exact problem. I would like to know how to fix it as well.

2001 jeep grand cherokee neutral safety switch bypass
 

2001 jeep grand cherokee neutral safety switch bypass
11-21-2009, 10:11 PM

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2001 jeep grand cherokee neutral safety switch bypass


this one is above my pay scale

2001 jeep grand cherokee neutral safety switch bypass
sorry

2001 jeep grand cherokee neutral safety switch bypass
 

2001 jeep grand cherokee neutral safety switch bypass
11-21-2009, 10:36 PM

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2001 jeep grand cherokee neutral safety switch bypass


I found this on another post
Yes, only two black wires from switch... It is on the passenger side just above the pan. You do not have to remove it from the tranny but it does give you a bit more room to work if you do. One wire is solid black and the other is black with a yellow stripe. Just splice them above the switch and you will completely bypass the neutral section of the switch. My friends also did the same thing about two weeks ago and we did the same thing to his and both are fine. Hope that helps.

2001 jeep grand cherokee neutral safety switch bypass
 

2001 jeep grand cherokee neutral safety switch bypass
11-21-2009, 11:12 PM

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2001 jeep grand cherokee neutral safety switch bypass


Hope you folks understand that the NSS does more than just prevent starting while in gear.

The range selector signal also goes through the NSS. This signal is needed to allow for proper shifting of your electronically shifted tranny.

2001 jeep grand cherokee neutral safety switch bypass
 

2001 jeep grand cherokee neutral safety switch bypass
11-22-2009, 06:53 AM

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2001 jeep grand cherokee neutral safety switch bypass


x2 on what frankz said. It is not a good idea to bypass the NSS. you could begin to have tranny problems and will might start acting funny. like shifting in and out of gears along with possibly losing overdrive at times. also it's a safety issue. in my opinion its always good to just repair then remove something.

2001 jeep grand cherokee neutral safety switch bypass
 

2001 jeep grand cherokee neutral safety switch bypass
11-22-2009, 07:19 AM

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2001 jeep grand cherokee neutral safety switch bypass


X3 it's there for a reason.

2001 jeep grand cherokee neutral safety switch bypass
 

2001 jeep grand cherokee neutral safety switch bypass
12-15-2009, 08:45 AM

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2001 jeep grand cherokee neutral safety switch bypass


I'm bypassing mine, its a 97 strictly offroad trailered everywere never sees over 20mph

2001 jeep grand cherokee neutral safety switch bypass
 

2001 jeep grand cherokee neutral safety switch bypass
01-09-2010, 11:22 PM

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2001 jeep grand cherokee neutral safety switch bypass


i have a haynes manual and looked at various other sources and for some reason my NSS won't come out...haynes says to take out the 12mm adjusting bolt and then the retaining nut & washer and then it should slide out. it wiggles but wont come out... i noticed that in installation you haveto disconnect the shift linkage on the opposite side of the tranny...is this true? and if so, how do i remove the 'u-shaped cable adjusting clamp'? so far diagrams havent helped, i dont see any u-shaped anything on the shift linkage off the tranny...

2001 jeep grand cherokee neutral safety switch bypass
 

2001 jeep grand cherokee neutral safety switch bypass
01-09-2010, 11:34 PM

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2001 jeep grand cherokee neutral safety switch bypass


No you do not need to disconnect the shift linkage.
PB Blaster and gently pry with a screw driver.

2001 jeep grand cherokee neutral safety switch bypass
 

2001 jeep grand cherokee neutral safety switch bypass
01-10-2010, 02:35 PM

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2001 jeep grand cherokee neutral safety switch bypass


so i pryed it, GENTLY, and the NSS slides out about a centimeter, it wont go any farther, ive sprayed it with WD40 but thats as far as it will come out...i tryed prying again but it feels like i need way too much force than whats called for (i dont wanna break anything inside the tranny)...should i keep prying or is there a secret to this? the NSS slides out very easily the first centimeter and then wont budge any farther

2001 jeep grand cherokee neutral safety switch bypass
 

2001 jeep grand cherokee neutral safety switch bypass
01-10-2010, 03:09 PM

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2001 jeep grand cherokee neutral safety switch bypass


I haven't had a chance to clean mine yet, but here is a great link!

2001 jeep grand cherokee neutral safety switch bypass

http://jeepin.com/features/nss/index.asp
"Next you'll need to pull the NSS off the tranny. It's rather stubborn, and you can't 'twist' it off -- it's got to come straight off. Using a great tip I got from the JeepsUnlimited Cherokee forum, I threaded the retainer nut back on a couple of turns, then used a flat head screw driver to carefully pry the NSS off, using the lip of the tranny pan for leverage. This worked like a champ and didn't damage the unit"

Hope this helps!

2001 jeep grand cherokee neutral safety switch bypass


Last edited by guest02; 01-10-2010 at 03:11 PM.

2001 jeep grand cherokee neutral safety switch bypass
 

2001 jeep grand cherokee neutral safety switch bypass
01-10-2010, 04:42 PM

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2001 jeep grand cherokee neutral safety switch bypass


You won't break anything inside the tranny. Try pushing it back and forth on the shaft, it'll come off eventually.

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Can a neutral safety switch be bypassed?

Yes, The neutral safety switch can be bypassed. However, this should only be done when testing the neutral safety switch. Connect the purple wire to the other purple wire with the white line to bypass the switch.