Lokar Cable Operated Shifter GM - Manual (Page 5)

INS0105 Rev. 06/24/14 Page 5 © 2007 Lokar, Inc.
Neutral Safety Switch Adjustment and Wiring
Step 17: 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 16.
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 18: Remove the neutral safety switch and washer (Fig. 19) from the right side of
the shifter using a 7/8" wrench or socket.
Step 19: Loosen, but do not remove, the two 5/16"-24 x 3/8" button head bolts that
connect the right side welded banana bracket to the switch plate (the bolts are
in curved, slotted holes). Fig. 19
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 20: 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. 20 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. 21
Step 21: Retighten the two 5/16"-24 x 3/8" button head bolts that attach the right side
of the floor mount mounting bracket to the switch plate.
Step 22: 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 23: 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 24: 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 25: Once the installation is completely finished and the neutral safety switch is
adjusted, remove each of the 5/16"-24 x 3/8" button head bolts from the
slotted, curved holes in the floor mount mounting bracket one at a time, apply
blue thread locking compound to the threads, and reinstall.
Fig. 22 shows a completed installation.
Fig. 18
Fig. 19
Switch Plate
Neutral Safety Switch
and Washer
5/16"-24 x 3/8" Button
Head Bolts