B&M 70248 CONVERTER LOCKUP CNTRL - Manual (Page 2)

and voltage between the proposed
power source and ground.
STEP 3. Connect the Red wire to +12V
power source and the Black wire to
ground connection located in STEP 2.
Reversing the polarity of these two
wires will damage the Converter Lock-
Up Control module and VOID THE
WARRANTY. Route wires so they can-
not become tangled in any mecha-
nisms (brake pedals, A\C, heater con-
trols).
STEP 4. Route remaining wires from
the Converter Lock-Up Control mod-
ule to the transmission. Make sure
wires passing through the fire wall or
floor pan are adequately protected
against abrasion with the sheet metal.
Also take care not to route wires near
hot exhaust pipes and high tension
ignition wires. The heat will melt insu-
lation from wires and the ignition pulses
can cause unpredictable Converter
Lock-Up Control operation.
STEP 5. Using a supplied splice con-
nector, connect the Black (thin) wire
of the shielded cable to one of the
transmission mounted speed sensor
wires. Attach the Red (thin) wire to the
other speed sensor wire. Depending
on application, there may be a Green
wire. Do Not attach this wire to any-
thing.
Please see Figure 2.
STEP 6. For most applications con-
nect the Yellow wire as shown in Fig-
ure 1 which shows the proper wiring
hookup for the Converter Lock-Up
Control. This diagram shows the stock
TCC (Torque Converter Clutch) and
brake light switch with the yellow wire
feeding through the switch and con-
tinuing down to the ‘A’ terminal on the
connector going into the transmission.
For ease of convenience, the kit is
supplied with the yellow wire and a
black grounding wire attached to a
connector that will plug directly into the
transmission. This yellow wire can be
cut and routed to the brake light switch
and then continue to the Converter
Lock Up Control. The short black wire
can be attached to a transmission pan
bolt to ground the circuit. In custom
applications you can bypass the brake
light switch, and you can plug the sup-
plied transmission connector directly
into the transmission and ground the
short Black wire from pin D. We rec-
2
Red (thin) Speed sensor.
Black (thin) Speed sensor.
Green (thin)Shield wire (not
shown).
Installation of the B&M Converter
Lock-Up Control requires hooking
up only the Red, Black and Yellow
wires, the Black (thin) and Red (thin)
wires will need to be spliced from
housing and plugged into control.
STANDARD INSTALLATION
STEP 1. Choose an accessible loca-
tion on the dash to mount the Con-
verter Lock-Up Control module. Us-
ing rubbing alcohol, clean the sur-
face. Remove the backing from the
hook & loop tapes and install on the
Converter Lock-Up Control module
& dash.
STEP 2. Locate ignition key controlled
5A-10A fused source of +12V and a
good chassis ground connection. Most
GM fuse panels have an instrument
section that can be tapped to supply
the Converter Lock-Up Control
module. Use a VOM (Volt-Ohm Meter)
or a test light to check the continuity
INSTALLATION
Installation of B&M’s Converter Lock-
Up Control requires clear access to
the underside of the vehicle in order to
properly route wires and install speed
sensor. Raise the vehicle so there is 2
feet or more ground clearance.
MAKE SURE THE VEHICLE IS RIG-
IDLY AND SECURELY SUPPORTED,
JACK STANDS, WHEEL RAMPS OR
A HOIST WORKS BEST, DO NOT
USE JACKS ALONE.
WIRING REQUIREMENT
The B&M Converter Lock-Up Con-
trol is relatively simple to hook up.
There are five wires connected to the
Converter Lock-Up Control module
which are color coded and have the
following functions:
COLOR
FUNCTION
Red +12V, 5A-10A fused,
ignition key controlled
source.
Black Chassis ground.
Yellow Supplies +12V to
transmission lock-up
clutch solenoid.
Figure 1
70248 LOCKUP CONTROL
Yellow
Red
Chassis ground
Red (thin)
Black (thin)
Switched 12 volts
40 Pulse/Rev.
Transmission
mounted speed
sensor
Slide switch in
this direction
Ring terminal
(ground)
Transmission
Black
TCC & Brake
light switch
supplied
connector
Yellow
Black