Safety Switch Kit Manual

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General Installation Notes:
Please read instructions completely before beginning installation. If you
have any questions please call.
Before starting installation, use wheel chocks to block the vehicle's
wheels. Do not attempt to install this product while the engine is running.
Disconnect the negative battery cable before beginning installation.
Make sure the engine, transmission, body and frame are properly grounded.
NOTE: This kit offers the choice of Back-Up Light Switch OR Neutral Safety Switch,
Not Both!
Refer to Fig. 1 for the component names.
Switch Installation:
Step 1: Install the bracket with the switch:
• For TH350, TH400, and TH200 Applications: Some of these transmissions use
standard bolts for the transmission oil pan, while others use metric bolts. Both
standard 5/16"-18 x 1-1/4" and metric M8 x 30mm bolts have been included
in this kit. Determine which pair matches the thread pitch on the pan bolts
you removed from the transmission, and discard the other two new bolts.
Install the correct thread transmission pan bolts from the Lokar kit, with the
3/8" thick spacers between the bracket and the transmission pan. Use the
flat washers and lock washers on the bottom side of the bracket, as shown
in Fig. 2.
• For 700-R4, 200-4R, and 4L60 Applications: Install the 1/4" spacers and two
metric bolts supplied with the Lokar kit. Use the flat washers and lock
washers on the bottom side of the bracket, as shown in Fig. 2.
Switch Wiring:
The switch is a non-directional, normally open, spring loaded ball switch. It
makes contact and passes current when the ball is depressed. For some
common applications, you will be cutting a single wire, and simply connecting
the cut ends to the switch terminals.
For Use as a Neutral Safety Switch
Step 2: Put the transmission in Park and install the double trigger as shown in
Fig. 2, with the 3/8" internal star washer between the trigger and your
original nut. Position the trigger so that the ball switch is depressed
in Park. The double trigger should also depress the ball switch when
transmission is in the Neutral position.
TOLL FREE 1-877-469-7440 • [e-mail] • www.lokar.com
®
Back-Up Light or Neutral Safety Switch Kit
Installation Instructions
Back-Up Light or Neutral Safety Switch Kit
Installation Instructions
INS0043 Rev. 04/08/13 RPD 05/13/14
Page 1
© 2002 Lokar, Inc.
For Use as a Back-Up Light Switch
Step 2: Install the single trigger onto the transmission gear selector shaft, with the
3/8" internal star washer between the trigger and your original nut. Put the
transmission in Reverse and make sure the ball switch is depressed. See Fig. 2
Step 3: Check the wiring of your fuse panel.
• If there is a connection for back-up lights on your fuse panel, you may run a 16
gauge (or heavier) wire from the fuse panel terminal to either of the back-up light
switch terminals. Run a second wire from the other backup light switch terminal
to your back-up lights. Be sure the back-up lights have a good chassis ground.
• If there is no connection for back-up lights on your fuse panel, you may connect
a wire from the headlight switch “taillight” terminal to either of the backup
light switch terminals, and then run a second wire from the other backup light
switch terminal to your back-up lights. If your vehicle uses standard GM wiring,
the taillight wire will usually be BROWN.
Reconnect the negative battery cable and check operation.
Step 3: Connect the 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, you must
run a #12 (or heavier) stranded wire from these terminals to the
(2) terminals on the neutral safety switch. That completes the
neutral safety switch wiring.
• If your wiring panel does not have neutral safety switch connec-
tions, you will have to 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, it must be cut and
routed from the ignition switch to one of the neutral safety
switch terminals, and from the second 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.
Reconnect the negative battery cable and check operation.
Fig. 1
Single Trigger
(for Back-Up Lights)
Switch
3/8" Internal
Star Washer
5/16"-18 x 1-1/4" Bolts M8 x 30mm Bolts
5/16" Lock Washers
1/4" Flat Washers
Bracket
1/4" Spacers
3/8" Spacers
Double Trigger
(for Neutral Safety Switch)