How do you test a neutral safety switch?

Turn on the ignition key and start the engine. If the neutral safety switch is working correctly the engine will start. To test the neutral safety switch, shut the engine off and restart the engine three times in the park position and three times in the neutral position on the shifter.

What happens when the neutral switch fails on a car?

If you have the column or floor shifter in park or in neutral and the engine does not start, then the neutral safety switch may have failed. Also, if the column or floor shifter is in gear and the engine is able to start then the neutral safety switch may have failed.

Why is my neutral safety swtich not working?

P0705 is a malfunction detected when the A/T control unit does not receive the correct voltage signal from the switch based on the gear position. It comes down to either the harness connector or the inhibitor switch itself. Any attempt to repair automotive parts and/or systems carries risk of personal injury.

Can a car start in the neutral position?

This can save you from the car starting in gear when you have a broken shift linkage. On older vehicles, the neutral safety switch is wired into the column and will only let the car start when it’s in the neutral position or not.

How to test and replace the neutral safety swtich?

Check with your vehicle’s repair manual for testing parameters. And don’t forget to wear safety glasses. The inhibitor switch detects the selector position and sends a signal to the A/T control unit. P0705 is a malfunction detected when the A/T control unit does not receive the correct voltage signal from the switch based on the gear position.

What is the neutral switch on a car?

In automatic transmissions, the neutral safety switch (also known as the starting safety switch) is a switch, normally open, that keeps the starting system from operating while the transmission is in gear.

What should I do if my safety switch fails?

When the safety switch fails, you can do a series of tests and see if it is just a matter of adjustment (if it is an adjustable type of switch) or if you actually need to replace it. Depending on the particular set up or configuration of your switch, you can test it with a small jumper wire, a test light, or a digital multimeter (DMM).

How do you adjust a neutral ignition switch?

Adjusting the Switch by Sliding the Switch Loosen the switch’s mounting bolts just enough so that you can move the unit sideways. Ask an assistance to turn and hold the ignition key in the start position, as if trying to fire up the engine. Then, slide the switch towards the Park or Neutral position.