B&M 120001 SHIFT PLUS 2 TRANS CONTROLLER - Manual (Page 2)

TCU - IMPORTANT!:
The TCU is water tight when connected to the wiring harness. It can be mounted in the engine compartment or in the
vehicle’s interior. It is good practice to mount the TCU with the connector facing down. This way, there is less chance
of moisture getting into the TCU if it needs to be disconnected in wet conditions.
The TCU should not be mounted close to other electrically “noisy” components. In particular, keep good spacing (try
for 2 feet minimum) from ignition components (ignition boxes, coils, distributors, etc.)
If mounting the TCU in the engine compartment, selecting a location towards the rear will make it easier to route the
communications cable to the interior to allow the handheld user interface to be monitored while driving.
There is an LED on the front face of the TCU (the side with the logo). It will flash if the on-board diagnostics detects a
problem (the LED is lit solid when the TCU is powered up and working normally). To take advantage of this feature, the
TCU will need to be mounted so that the front face of the TCU is visible. The handheld user interface will also indicate
if any faults have been detected.
WIRING HARNESS- IMPORTANT!:
The wiring harness should be kept away from ignition components (ignition boxes, coils, distributors, etc.) as much as
possible. Do not bundle the wiring harness together with other “noisy” wiring in the vehicle.
As with any wiring, it is good practice to avoid routing the wiring harness around sharp edges or near high temperature
components such as headers or exhaust components.
WIRING HARNESS CONSISTS OF THE FOLLOWING CONNECTION:
BATTERY POSITIVE (red wire) / NEGATIVE (black wire)
These must be connected DIRECTLY to the positive (red wire) and negative (black wire) posts of the battery. These
must be run independently to the battery. DO NOT splice other power or ground wires into these wires. Failure to
follow these requirements invites problems with electrical noise. These kinds of problems are difficult to diagnose.
The wires may be extended if needed using automotive grade 16 gauge (or larger) wire.
12V SWITCHED (pink wire)
Connect this wire to a switched ignition source that is hot with the key in the On/Run and Crank positions. DO NOT
connect to the positive side of an ignition coil. Strange problems can sometimes arise when tapping into existing
switched ignition sources. When in doubt, run this wire through its own switch and then directly to the positive post
of the battery.
TRANS
This connects to the round connector on the passenger side of a 4L60E transmission or on the driver side of 4L80E.
Note: Pre-1993 4L80E's will need an updated internal wiring harness.B&M part# 120003, GM part# 24200161 or
equivalent.
4L60E 4L80E
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