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1957 Oldsmobile:This car starts in any gear. don't know if this an ignition switch problem or a netraul safety switch problem. How can I test the neutral safety switch, and or ignition switch ? Thanks, John

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It is the Neutral safety switch not the Ignition switch.

Posted on Jan 03, 2011


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1 Answer

I have a 1999 montecarlo z34. somestimes when I turn on the ignition it don't start and sometimes it does start.

Do you know how to test automotive electrical circuits ? Do you know what a park neutral safety switch is ? First try moving the gear selector into neutral an see if it starts then . If it does neutral safety switch is the problem . If it doesn't , well the you need to test the starting circuit's .

How to voltage drop test starter motor circuit

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1996 toyota t 100 wont turn over

can you be a little more specific about the neutral safety switch?

Aug 15, 2017 | 1996 Toyota T100

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Ignition Problems

Yeah... Very good logic..!

Without the year... it would be pure speculation.

I can assure you that the late 50's did INDEED have troubles EXACTLY as you describe... and It was an EXCITING RIDE
(upside down with my shoulder on the gas peddle)...
((feet flailing in the air)).

So you probably want to raise the car, block the wheels
and select a flat/open area in up state Utah or Texas

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My 2001 Jeep Grand Cherokee wont start sometimes, but if I put it in neutral then try to start it..It starts .. What is the problem with my baby.......


The circuit on newer cars with automatic transmissions has a neutral safety, or neutral start switch installed between the ignition switch and the starter. The ignition switch cannot operate the starter motor unless the transmission is in park or neutral.
Late model vehicles with manual transmissions have a starter/clutch interlock switch that requires the clutch to be depressed to the floor.
Neutral Safety Switch
Normal operations of a neutral safety switch provides a quick check for the adjustment of the gear selector linkage.
  • To do this, move the selector slowly until it clicks into the PARK position.
  • Turn the ignition key to the START position.
  • If the starter operates, the PARK position is correct.
  • After checking the PARK position, move the lever slowly toward the NEUTRAL position until the lever drops at the end of the NEUTRAL stop in the selector gate.
  • If the starter also operates at this point, the gearshift linkage is properly adjusted.
  • This quick test also tests the adjustment of the neutral safety switch.
  • If the engine does not start in either or both of these positions, the neutral safety switch or the gear selector linkage needs adjustment or repair.

Since you must work under the vehicle to adjust most shift linkages make sure you properly raise and support the vehicle before working under it. Also, wear safety glasses or goggles while working under the vehicle.
A voltmeter can be used to check the switch for voltage when the ignition key is turned to the START position with the shift lever in PARK or NEUTRAL. If there is no voltage, the switch should be adjusted or replaced.

Jan 26, 2013 | 2002 Jeep Grand Cherokee

1 Answer

Starter will not work, other electrical appears ok, it's like the clutch switch doesnt allow power to starter, but don't know if its clutch switch or not, what are other checks to make - it did...

From what I read it your starter not wanting to engage ,there is going to be three things battery connection but you say its okay, how about ignition switch you have to rule that out and then there is the clutch safety switch,just test the clutch switch look under where the switch is did it get pushed out, now you can jump the switch but the problem is it a safety device so you dont start in gear and go foward and hit a car or a person.but its the only way to test the switch or you can make sure car is in nuetral wheel choked e brake on and some one there as for safety and direct the starter this only tell you the starter works,but from what you describe I have to say your safet clutch switch is non op,

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I recently replaced the multi-function switch on my '95 Olds Achieva because the high beams did not engage. Problem solved. But now, it won't start. I was able to start it initially to take it in for the...

Check the ignition switch connector. Check for 12v on the start circuit with the ignition in the start position. Check neutral safety switch connector. Check for 12v in and out of the N/S switch when the gear selector is in neutral or park and the ignition is in the start position. If you have 12v there check at the small terminal on the starter solenoid. If you find 12v there and on the big terminal there would appear to be a starter problem.

Apr 20, 2011 | 1995 Oldsmobile Achieva

1 Answer

Is there a "neutral safety

most automatics have a safety switch so they can only be started in park or neutral.
if there is a fault in the switch it would prevent the car from starting.
i dont know specifics on oldsmobiles, but on most cars the switch is located on or around the gear selector lever.

Feb 20, 2011 | 1999 Oldsmobile Cutlass

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I want to know why the car is not starting when turning key but starts when using gears

Either the starter, solenoid, battery, or ignition is faulty. Starter and battery can be tested for free at most part stores. Or the neutral safety switch is faulty which is common

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Won't start

Starter or solenoid may be bad, also start/nuetral safety switch on transmission may be going.

Jan 06, 2009 | 2000 Oldsmobile Intrigue

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