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Author Topic: neutral safety switch  (Read 1954 times)

bushwacker

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neutral safety switch
« on: April 06, 2010, 08:20:31 PM »
well, round two on getting this thing going. 1983 Itasca Spectrum on 1982 Chevy P30 Chassis.

 Not getting any power to the starter solenoid. So Im thinking check the ignition switch or neutral safety switch. This is a dash mounted shifter, I don't see anything like a NSS under the dash. Follow the cable down to the transmission. Nothing there either. I see a connecting rod coming off of the linkage that goes into the tranny, just hanging there. It looks like there are two bolt holes in the tranny, not sure dirty and dark. I look up around the bell housing, there is a bundle of wires with a connection recepticle with nothing conneced. The connector is about the diameter of a quarter, two horizontal, two vertical female slots. One of the horizontal is  heavier wire, red, has power when I turn the key.

Unless I'm blind and missed some hidden NSS, is this where it should go? I looked online at the auto parts shops, but they only had what appeared to be column mounted NSS. Am I on the right track here? If this is my problem, where would I purchase one? I have looked online for a 1982 P30 shop manual, but no luck. Safety wise, I wouldn't operate drive this thing, but assumming this is the NSS plug, can I cross the recepticle wires to get the motor running?  If so, how? Hopefully, I not barking up the wrong tree!!

Thanks for any input.

Gary RV Roamer

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Re: neutral safety switch
« Reply #1 on: April 07, 2010, 07:50:50 AM »
Back to the stater solenoid power issue: there are two wires involved - the big wire that carries the current to the starter and the small wire that activates the relay. Which one has no power? The smaller wire gets power when the ignition key closes the start circuit and the NSS prevents that from happening if not in neutral/park. Power on the big wire to the solenoid comes direct from the battery and should always be present.

Sure you can jumper around the NSS or even the entire ignition switch to see if solenoid works and the engine cranks.
Gary
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Gary Brinck
2004 American Tradition
2007 GMC Acadia
Homebase: Ocala National Forest, FL

Gary RV Roamer

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Re: neutral safety switch
« Reply #2 on: April 07, 2010, 07:59:41 AM »
Try ebay for a manual.  When looking for a P-series service manual on Ebay, don't search on P30 only.  It may be listed as P3, P32, P30 or just Chevrolet chassis. Does not have to be that specific year either, since the P-series chassis did not change much in the 80's.

Try an ebay search for Chevrolet chassis manual  P  (with no numbers after the 'P').  I just did it and found a 1980 P chassis manual that way. Or leave the 'P' off as well and you will get a lot more hits, but some will not be relevant.
Gary
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Gary Brinck
2004 American Tradition
2007 GMC Acadia
Homebase: Ocala National Forest, FL

John From Detroit

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Re: neutral safety switch
« Reply #3 on: April 07, 2010, 10:19:59 AM »
ON many cars there is a Neutral/Park/Reverse light switch.. Do your back up lights work?

If not then that connector you found may be the culprit.. Where to hook it up I don't knwo

Other vehicles the N/P/R/ switch is on the column..   I have seen it both places.  And I know what to look for if I"m crawling around under the ride.. but I'm afraid I can't tell you.

But if you have a socket on the end of a wire bundle..... Look for a matching plug on the housing

As I recall.. the one I had mounted on the tranny.. Had 3 contacts.. all round.. Ford Transmission
Nothing adds excitement like something that is none of your business
My Home is where I park it.

bushwacker

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Re: neutral safety switch
« Reply #4 on: April 07, 2010, 01:52:42 PM »
Starter wise, the first thing I did was pull the starter. hoping agains hope it was a simple starter replacement, no go. Grounded the starter and hooked up the main power and jumped to the smaller wire and the starter worked. When I turn the key, I have no power to the smaller bolt/wire on the starter solenoid. Constant power to the big nut/wire from the battery. After checking for loose/bad connections under the hood, a lot of info pointed to a likely problem with the ignition switch or the NSS. Thats how I ended up hopefully narrowing it down to the NSS.

With regard to that, what first made me notice it, it was the only clean surface under there. Like something that was plugged into it was gone. Its laying on the bell housing, and appears to come off of the same wires bundle from the starter. This offshoot, with the recepticle, will not reach the transmission linkage, or the transmission itself john. It is about 2-3 feet short of where the unhooked connecting rod is. In my wishful thinking, I can see a NSS bolted to the side of the tranny, this rod on the linkage, hooks into the NSS, (the rod "pivots" when I run through PRNDL) and possibly the NSS is hardwired with a two foot section with a male connector on the end!!  haha!!  that's my fantasy anyhow.  a guy can dream cant he??? regardless, that rod hooks into something, and that something is not there. if anyone has their NSS on the transmission like this, I'd appreciate knowing if I am on the right track.

Thanks for the search tips. NEVER have seen so much stuff pop up in my searches.

Lou Schneider

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Re: neutral safety switch
« Reply #5 on: April 07, 2010, 02:02:02 PM »
Check the voltage on the pins of that mystery connector.   If it's the NSS you should have 12 volts on one pin ONLY when you turn the ignition switch to start.    If it's there, the other pin should run to the small terminal on the starter.   Set your multimeter to Ohms and confirm this by touching one lead to that pin and the other to the small starter terminal.

If both check out, jumper the pins and see if the starter works.

bushwacker

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Re: neutral safety switch
« Reply #6 on: April 07, 2010, 03:54:39 PM »
well, previous to lou's post, I did jump a couple of those connectors. What do ya know, the starter started cranking!!

The motor didn't start, not really expecting it to right away. Its been sitting for years. I assume the gas in it is bad.  Any suggestions for getting  a motor, that's been sitting there for years, running? Any priority things that need to be taken care of before hand?

Also, that connector has four wires, I jumped the top right horizontal with the bottom right vertical.  Will it be ok to try to run the motor not having the other wires attatched?  Thanks for any input.

John From Detroit

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Re: neutral safety switch
« Reply #7 on: April 07, 2010, 05:42:35 PM »
The other wires are most likely the back up lights  Since that's the same switch that powers them

Now, on to the next problem.. The motor..  If it is a gas engine you should have pulled the plugs and fogged it before you cranked it... If it's diesel same thing but I don't know how to fog one of those.

Other than that... A complete cleaning of the fuel system,, That means a carb rebuild if it has one or injector cleaning,  Blow out the lines, drain the tank and re-fill with fresh fuel.
Nothing adds excitement like something that is none of your business
My Home is where I park it.

max49

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Re: neutral safety switch
« Reply #8 on: April 08, 2010, 09:36:29 PM »
   The P- Series is famous for ignition switch problems. That was my first thought when I started reading your post. If you jumpered something to make the starter turn over, it's still possible that the ignition was not on.  Here are a couple of links about the ignition switch.

http://www.oemys-performance.com/diyprojects5.htm#switchfix

http://www.oemys-performance.com/media/WH%20Ignition%20Relay.pdf

Even if you don't do the relay mod, you may have a bad ignition switch, it down by the bottom of the steering column.

It does say it's for 2001 and up MH's but I think they say that because thats the year WH aquired the rights to the chassis, but I could be wrong.
« Last Edit: April 08, 2010, 09:40:05 PM by max49 »
Max