Banks Power Ford Trucks: (Diesel ’94 - 97 7.3L Power Stroke) Tuner- Big Hoss Module - Manual (Page 4)

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1.
Disconnect all battery
ground cables.
2.
Locate the EcU. 1994-
1997 models only: The
EcU will be located in a
recess in the firewall on the
engine side, between the
steering column and the left
front fender. All that will be
visible is an elongated
electrical connector and
wire loom, surrounded by a
retainer plate attached with
two nuts. See Figure 1.
1999-2003 only: The EcU
will be located under the
dash toward the left-hand
side of the vehicle. It will be
housed in a black plastic
box bolted to the side of the
vehicle.
3.
Loosen the bolt attaching
the electrical connector to
the EcU on the engine
compartment side.
4.
1994-1997 only:
Remove the two nuts and
retaining plate from against
the firewall. Pull the EcU out
of the firewall toward the
front of the vehicle. It may
be necessary to remove the
rearmost bolts attaching the
flexible inner fender well to
the body to provide
clearance to remove the
EcU. 1999-2003 only:
Loosen the two hex bolts on
the rear portion of the black
plastic box. Remove the box
and EcU from the vehicle
together. Pull the EcU out of
the plastic box.
5.
Pry the plastic cap from
the rear of the EcU using a
small screwdriver, exposing
the printed circuit board
edge connector inside.
Retain the plastic cap.
Loosen and remove the six
bolts that hold the case of
the EcU together. Open the
case of the EcU being
careful not to lose the
plastic spacer or damage
any circuitry inside the EcU.
6.
clean both sides of the
connector. First, clean the
white grease off with a
tissue. Next, scrape the
clear silicone type coating
from the connector fingers
with the abrasive square
provided. It is very important
to clean both sides of the
board in order to have a
good connection between
the EcU and the Big Hoss
module. It is only necessary
to clean the connector
fingers. Be careful not to
damage any circuit traces
on the board further inside
the EcU.
7.
Reassemble the EcU
case. Orient the Big Hoss
module so that its edges
line up with the edges of
the EcU case. Place the
module over the connector
and press firmly to set the
connection. DO NOT FORcE
the module onto the
connector, as damage may
result to either the EcU or
the module. Place a piece of
duct tape over the module,
fastening it firmly to the
EcU.
8.
1999-2003 only: Using a
band saw or hacksaw, cut a
portion of the black plastic
case away allowing the
module to reside in its
proper location. See Figure
2.
9.
Replace the EcU in its
original location and tighten
all bolts. Reattach the EcU
connector to the EcU and
reattach battery cables.
10.
check the operation of
the Big Hoss module and
EcU. The vehicle may not
start if the coating on the
EcU connector is not
completely removed or if
there is a mismatch of
codes. A quick indication of
module connections that
are not cleaned properly is
the “Wait to Start” indicator
will fail to light and the
“check Engine” warning
indicator will stay lit after
the key is switched on. If
the engine fails to start,
re-clean the ECU connector,
reinstall the module and try
again.
Banks Big Hoss
™
EnGInE CaLIBratIOn MOduLE InstaLLa tIOn