Thursday, June 25, 2009

Neutral Safety Switch

You know your neutral safety switch is going bad when your reverse lights do not come on unless you hold your shifter as far back as you can to get them to work if they turn on at all. It is a cheap part from the dealer, I beleive I paid under $30.


The Neutral Safety Switch is located right above the ATF pan on the outside of the drivers side section of the transmission, it is angled to the front of the vehicle. Here is an image of what it looks like.

The image is not real clear, but it is just to give you and idea of what it looks like on the outside of the vehicle. It is the switch that has a connector and wires coming out of it.


In order to replace the NSS:
1) Unhook the battery and drain the tranny fluid
2) Undo the connector on the outside of the switch
3)Am not sure of the size (I beleive it is 1 inch) but use an open end wrench to loosen up the switch, a deep well socket will not work in this location.
4) If you did not drain your fluid, expect a rush of ATF coming out
5)Place new sensor in and replace the tranny pan
6)Replace lost tranny fluid and hook the battery back up


Notes:
1) Since you're in there, get a tranny fluid filter and replace it
2) It is pretty tight but not a difficult job, have some patience.


Disclaimer: You can use these instructions however you choose, but I am not liable for anything you do. Please feel free to link to them from other sites, but you must get my permission first before copying them off of this site to elsewhere.

6 comments:

  1. Thanks for posting the picture of the NSS. Really helped. Well at least I think. I will find out soon when I climb back under and look.

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  2. Have a very good Switches and Sockets blog which is really interesting and knowledgeable. I really appreciate you for this good work keeps it up. You can also find a very good blog at Switches and Sockets by Meteor Electrical.

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  3. I need the wire specs for the connector on the nss I had to update my sensor and connector to the three prong one (you can look up on auto zone for 98 grand Cherokee) the new connector has three wires as well but they are completely different colors than the original so I have no idea which ones to connect together

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  4. I need the wire specs for the connector on the nss I had to update my sensor and connector to the three prong one (you can look up on auto zone for 98 grand Cherokee) the new connector has three wires as well but they are completely different colors than the original so I have no idea which ones to connect together

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  5. not very hard, a little tight? honestly, you will probably have to cut your wrench in half and lower the transmission to get at it at all!

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