Lokar Automatic Transmission Shifter GM Tailmount - Manual (Page 5)

INS0099 Rev. 06/24/14 Page 5 © 2007 Lokar, Inc.
Neutral Safety Switch Adjustment and Wiring
Step 13: For the neutral safety switch to function properly, the shifter linkage must be
adjusted correctly. Do not attempt to adjust the neutral safety switch unless
you have completed
Step 12.
The Lokar neutral safety switch is a simple on/off, non-directional switch.
The switch passes current (turns on) when the ball is pushed in. It does not
pass current (turns off) when the ball is out at its at-rest position.
Double check to make sure that the bolts in the left side welded banana
bracket are tight.
Step 14: Remove the neutral safety switch and washer (Fig. 9) from the right side of
the shifter using a 7/8" wrench or socket.
Step 15: Loosen, but do not remove, the two 5/16"-24 x 1/2" button head bolts that
connect the right side welded banana bracket to the switch plate (the bolts
are in curved, slotted holes).
Fig. 9
WARNING: Before taking the shifter out of Park, be sure that the vehicle’s
tires are blocked and the parking brake is set to avoid movement of the
vehicle.
Step 16: Put the shifter into the Reverse position. Reposition the switch plate so that
the hole in the switch plate lines up with the center groove in the shifter
body.
Fig. 10 Screw the provided aluminum adjuster plug into the neutral
safety switch opening. Wiggling the switch plate slightly forward and back
while you are screwing the aluminum adjuster plug in will help get the
shifter body centered on the adjuster plug.
Fig. 11
Step 17: Retighten the two 5/16"-24 x 1/2" button head bolts that connect the right
side welded banana bracket to the switch plate.
Step 18: Remove the aluminum adjuster plug, and reinstall the neutral safety switch
and washer onto the shifter. Test for continuity by connecting an ohmmeter
lead to each stud on the neutral safety switch. When adjusted correctly, you
will only have continuity between the two switch studs when the shifter is
in Park or Neutral. Continuity in any other gear requires readjustment of the
neutral safety switch or the shifter.
Step 19: Connect the neutral safety switch between your ignition switch and starter
circuits. Check the wiring of your fuse panel:
• If there are (2) connections for a neutral safety switch, run a #12 (or
heavier) stranded wire from these terminals in your fuse panel to the (2)
terminals on the neutral safety switch. That completes the Neutral Safety
Switch wiring.
• If your fuse panel does not have neutral safety switch connections, locate
the wire going from the ignition switch to the starter. If GM color codes are
used, this wire will usually be purple. After locating the wire, disconnect it
from the starter. It must be cut and routed from the ignition switch to one
of the neutral safety switch terminals, and from the other neutral safety
switch terminal to the same stud on the starter where the original wire was
removed. If the wire must be lengthened, be sure to use wire that is at
least the same size or larger than the original.
Step 20: Reconnect the negative battery cable and check operation. Make sure
that the engine will not start in reverse or a drive gear. If it does, follow
the neutral safety switch adjustment procedure again. If your car should
ever start in any gear other than Park or Neutral, please readjust the
neutral safety switch accordingly. Tighten all brackets and bolts correctly
and securely and there should be no movement or maladjustment. If
you have any questions after following this procedure, please call Lokar
Technical Support.
Step 21: Once the installation is completely finished and the neutral safety switch is
adjusted, remove each of the 5/16"-24 x 1/2" button head bolts from the
welded banana brackets one at a time, apply blue thread locking compound
to the threads, and reinstall.
Fig. 9
Fig. 10
Shifter in
Reverse Position
Neutral Safety Switch
and Washer
5/16"-24 x 1/2" Button Head
Bolts with Lock Washers
Switch Plate
Center Groove in
Shifter Body