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neutral safety switch 900 1993

posted by  ronald on  Wed Jun 30 04:26 CST 2010
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last visit: Wed Oct 10 11:04 CST 2012
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Can I temporarily bypass a defective neutral safety switch? I realise I will lose reverse lights. The wires leaving my old one are pink, blue red, black and blue.

thanks,

Ron

93 245
93 944








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    neutral safety switch 900 1993

    posted by  soundmiami on  Wed Jun 30 16:04 CST 2010
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    last visit: Mon Oct 20 18:58 CST 2014
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    I'm not sure I am talking about the same part. Does it look like this?


    Volvo 940 8-Valve Gear Selector Switch 1993-1995 (OEM)

    http://www.fcpgroton.com/product-exec/product_id/24337/nm/Volvo_940_8_Valve_Gear_Selector_Switch_1993_1995_OEM_/category_id/208

    If so I have an extra somewhere, call me. the hardest part was disassembling half the console to get to it.








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      neutral safety switch 900 1993

      posted by  ronald on  Thu Jul 1 02:20 CST 2010
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      Not that part but thanks anyway. Here's the part:

      http://www.fcpgroton.com/product-exec/product_id/52094/nm/Volvo+940+Neutral+Safety+Switch+1991-1993+%28Genuine+Volvo%29

      Ron








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    neutral safety switch ('Start Inhibit' switch on 940) 900 1993

    uid 18083's pic
    posted by  lucid on  Wed Jun 30 05:16 CST 2010
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    According to the '93 diagrams, the Start Inhibit and Back Up are two separate switches.
    Pink and Blue wires on SI Switch, Bl-R and Black on BU switch.
    I've never seen either one.

    Bypassing should be possible, but your call.


    --
    Bruce Young, '93 940-NA (current), 240s (one V8), 140s, 122s, since '63.








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      neutral safety switch ('Start Inhibit' switch on 940) 900 1993

      posted by  ronald on  Wed Jun 30 06:33 CST 2010
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      Thanks. I'm surprised to find that current passes through this neutral safety switch enroute to the starter solinoid without the benefit of a relay. The switch looks robust enough but it mounts to 2 plastic nibs with a circular metal tab with an X in the middle. Mine must have been loose enough (one tab broken)to cause arcing and heat and smoke. I'm very tempted to wire the pink and blue wires together until I can find the whole shifter housing intact at a wreckers. I might be able to reinstall the BU portion only provided that part of the switch is still viable. I'll also consider drilling out the plastic tabs and replacing them with bolts.

      Ron








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        neutral safety switch ('Start Inhibit' switch on 940) 900 1993

        posted by  boxvolvo on  Thu Jul 1 01:09 CST 2010
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        last visit: Fri Oct 24 04:28 CST 2014
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        The current passing through the neutral safety switch is relatively low amp - enough to trigger the solenoid, which is the relay in the starter circuit.

        I bypassed the NSS in my daughter's car for a couple of days while I was waiting for a new part. No big deal, just make a strong mental note to make sure the car is in Park when starting.

        Trivia time - I can think of at least one domestic car from the late 1950s that had an automatic trans, but did not have a neutral safety switch and in fact did not need one. Can anyone identify the car?







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          neutral safety switch ('Start Inhibit' switch on 940) 900 1993

          posted by  ronald on  Thu Jul 1 02:29 CST 2010
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          last visit: Wed Oct 10 11:04 CST 2012
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          So, that's what I did and the car started fine with no smoke. Yes, I guess it makes sense that the solinoid is the relay for the starter. Will make sure it's in park. 1950s car eh? I can't even guess.

          Ron







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