Neutral switch diagram

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The neutral safety switch is located on the top and toward the base of the steering column almost to the floorboard.

To remove or install the neutral safety switch be sure to place the shifter in the neutral position, then dis-connect the wire connector at the neutral safety switch, then remove the securing screws and then remove the neutral safety switch.

Install the new neutral safety switch and do not over-tighten the securing screws, then remove the alignment pin and re-connect the wire connector to the neutral safety switch. (be sure not to remove the alignment pin until the neutral safety switch has been installed)

Check to be certain that the vehicle only starts in "Park" or "Neutral". Here is an image to help assist you, and let me know if you require any further assistance.

Check the next diagrams...



Fig. 1: Neutral/Park position switch-3T40 transaxle



Fig. 2: Neutral/Park position switch-4T60-E transaxle


ADJUSTMENT

1. Place the shifter in the N detent.
2. The switch is located on the shift shaft on the top of the automatic transaxle. Loosen the switch attaching bolts.
3. Rotate the switch on the shifter assembly to align the service adjustment hole with the carrier tang hole.
4. Insert a 3 /32 in. (2.34mm) maximum diameter gauge pin into the hole to a depth of 9 /64 in. (9mm)
5. Tighten the mounting bolts and remove the pin.

Hope this helps (remember rated this).

Use like reference guide for GM Cadillac 1967-1989 Repair Guide Neutral Safety Switch - REMOVAL & INSTALLATION

All Except 1985-89 Eldorado and Seville
See Figure 1
The neutral safety switch prevents the engine from being started in any transmission position except Neutral or Park. The switch is located on the upper side of the steering column under the instrument panel on column shift cars, and inside the shift console on floor shift models.

1. Remove the console for access on floor shift models.
2. Disconnect the electrical connectors.
3. Remove the neutral switch.

To install:

1. Place 1967-70 column shift lever models in Drive, and 1971 and later models in neutral. Locate the lever tang against the transmission selector plate on column shift models.
2. Align the slot in the contact support with the hole in the switch. Insert a 3 / 32 in. (2.38mm) diameter pin in place. The switch is now aligned in Drive position.

1973 and later neutral safety switches have a shear-pin installed to aid in proper switch alignment so that insertion of a pin is unnecessary. Moving the shift lever from Neutral shears the pin.

1. Place the contact support drive slot over the drive tang. Install the switch mounting screws.
2. Remove the aligning pin. Connect the electrical wiring, and replace the console.
3. Set the parking brake and hold your foot on the service brake pedal. Check to see that the engine will start only in Park or Neutral.

Fig. 1: Installation of a common neutral safety switch



ADJUSTMENT
See Figure 2
1974 and later cars do not have a neutral safety switch. Instead, these cars have an interlock between the lock and the transmission selector, which is non-adjustable.

1. Place the shift lever in Neutral.
2. Move the switch until you can insert a gauge pin, 3 / 32 in. (2.38mm) diameter, into the hole in the switch and through to the alignment hole.
3. Loosen the switch securing screws. Remove the console first, if necessary.
4. Tighten the screws and remove the pin.
5. Step on the brake pedal and check to see that the engine will only start in Neutral or Park.
   

Fig. 2: Adjustment of a common neutral safety switch


1985-89 Eldorado and Seville
See Figure 3

All neutral safety/back-up light switches come with a small plastic alignment pin installed. Leave this pin in place.

1. Place the shifter assembly in the Neutral position.
2. Remove the shifter lever-to-switch nut and the lever.
3. Disconnect the electrical connector from the neutral safety/back-up light switch.
4. Remove the neutral safety/back-up light switch-to-transaxle bolts and the switch from the vehicle.

To install:

1. Position the shifter shaft in the Neutral position.

If using an old switch or the plastic pin (new switch) is broken, install a3/32in. (2.38mm) diameter pin gauge (drill bit) into the neutral safety/back-up light switch; the switch is then locked into its Neutral position.

1. Align the flats of the shifter shaft and the neutral safety/back-up light, then, align the switch-to-tang on the transaxle. Torque the switch-to-transaxle bolts to 22 ft. lbs. (30 Nm). Remove the pin gauge.
2. To complete installation, reverse the removal procedures. Make sure that the engine starts only in the Park and Neutral positions.
   

Fig. 3: Neutral start and back-up lamp switch - 1985-89 Eldorado and Seville

Hope help with this (remember rated and comment this). Good luck.

The Neutral Safety Switch function is controlled by the Transaxle Range Sensor (TRS). This Switch is Located ON the Transmission with Plug Facing UP and it is on the Bumper / Driver Side of the Transmission You Simply UNPLUG Electrical Connecter, And then the Unit Screws Out of Transmission Counterclock Wise, Install REVERSE Procedure.
NOTE: Be sure to have a DRAIN PAN Under your Work Area as there May be SOME Fluid Drainage When Switch is Removed, Swap them Fast if Fluid Comes out Fast so as NOT to have to Replace A Bunch of Trans. Fluid.

Yes, that was too much. The neutral safety switch costs around $70 (if I remembered right). I bought it from my Mazda dealer and asked them for a diagram to locate it. In most cases, my Mazda dealer has been helpful in provide diagrams for this minivan. The switch is located underneath the battery (you'll have to remove it) on the transmission. Make sure it is aligned right when you replace the switch; otherwise it won't find neutral, and you'll have to use the bypass switch on top of the steering column to start you engine.