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Old 07-23-2013, 11:46 AM   #1
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Neutral Safety Switch??

Hey guys,

I have a 2005 Wrangler Sport 4.0 Auto trans. 108k miles
Went to crank after work one day and it did nothing, lights,radio,fans,instrument panel all worked fine.
Sat there for 15-20,tried again and just got a 'click click click'
Sat there for another 10 min and she cranked right up,went home with no problems.
Got home, killed it, tried to start again and nothing,no clicking at all......, radio,fans,lights work.
Took battery to get tested,tested fine.
Cleaned all battery connection and also checked all wires for good connection, this includes all ground wires to and from starter and battery, all wires connected securely. Still nothing.

Took starter to get tested, was told starter and solenoid look perfect. No problems.
Got the starter back on, tested the yellow wire connected to solenoid did not have any power running through to it.

I can not jump the jeep off to get started, the only way to start the jeep is with a screwdriver on the starter.

Could this be the neutral safety switch?



Any ideas??



Thanks for any help!!

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Old 07-23-2013, 12:01 PM   #2
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Might try getting a new battery. I had something similar happen. Jeep wouldnt start from time to time. Would just click, click, click. While driving the batter gauge on the dash would spike past 14v. My battery tested fine but it was coming apart. If I pushed down on the battery it would work fine for a few days and tested fine when I pushed down on it. I ended up getting a new battery and hasnt happened in over a year now.

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Old 07-23-2013, 04:29 PM   #3
Knows a couple things...

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It certainly could be the NSS, it could also just be that your transmission shifter cable has stretched & isn't putting the NSS into its Park or Neutral parking positions. Try moving the shifter between Park & Neutral while the key is held in the start position. If it starts somewhere between Park & Neutral, the shifter cable is simply out of adjustment.
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Old 07-23-2013, 05:39 PM   #4
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Thank you for the rapid responses, very grateful guys.


I tried the shifting from park to neutral then all around with the key turned all the way. No go.

It won't start with just a jump, but has to be started with the screwdriver and the key turned all the way.

Any idea what the yellow wire coming off the solenoid is?

Once again, all my connections are clean and tight.
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Old 07-23-2013, 07:01 PM   #5
Knows a couple things...

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Your starter motor (which also has a starter solenoid attached to it) has two sources of 12 volts running to it. One I'll call "heavy amperage 12 volts" is a constant 12 volts via a heavy cable connected to the battery. The other 12 volts is from the starter relay which is what I'll call "light amperage" 12 volts.

When you turn the ignition switch to Start, the light amperage 12 volts is sent by the Starter Relay inside the Power Distribution Center to the starter motor's starter solenoid, which then connects the heavy amperage 12 volts to the starter motor itself.

Check to see that you have both sources of +12 at your starter motor when the ignition key is turned to Start. If you do and the starter motor doesn't turn, you have a bad starter motor. If you don't have both sources of +12 volts (the Heavy Amperage from the battery and Light Amperage from the starter relay), then the problem is elsewhere... clutch safety interlock, ignition switch, etc.
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Old 07-24-2013, 08:00 PM   #6
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Ended up having to repair a corroded starter relay wire, cranked right up!

It was pretty stressful being without my jeep.

Thanks again for the help guys

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