Dodge ram truck 3500 1996 Service Manual page 545

B R OVERHEAD CONSOLE SYSTEMS 8V - 5
S E R V I C E P R O C E D U R E S (Continued)
NOTE: If the wrong direction is still indicated in the
compass display, the area selected for calibration
may be too close to a strong magnetic field. Repeat
the calibration procedure in another location.
COMPASS DEMAGNETIZING
A degaussing tool (Special Tool 6029) is used to
demagnetize, • or degauss, the roof panel. Equivalent
units must be fated as continuous duty for 110/115
volts and 60Hz. They must also have a field strength
of over 350 gauss at ~ 1/4-inch beyond the tip of the
probe.
To demagnetize the roof panel, proceed as follows:
(1) Be certain the ignition switch is i n the Off posi­
tion, before you begin the demagnetizing procedure.
(2) Place an 8-1/2 X 11-inch piece of paper, ori­
ented on the vehicle lengthwise from front to rear, on
the center line of the roof at the windshield header
(Fig. 2). The purpose of the paper is to protect the
roof panel from- scratches, and to define the area to
be demagnetized.
PULL TIP OF DEGAUSSING TOOL AWAY
C AT LEAST TWO FEET AND
DISCONNECT
c
C
C
3
1/2"
c
c
3
'WINDSHIELD EDGE"
START
(4) Slowly approach the center line of the roof
panel at the windshield header, with the degaussing
tool plugged in.
(5) Contact the roof panel with the tip of the tool.
Be sure the template is i n place to avoid scratching
the roof panel. Using a slow, back-and-forth sweeping
motion, and allowing 1/2-inch between passes, move
the tool at least four inches to each side of the roof
center line, and eleven inches back from the wind­
shield header.
(6) With the degaussing tool still energized, slowly
back it away from the roof panel. When the tip of the
tool is at least two feet from the roof panel, unplug
the tool.
(7) Calibrate the compass and adjust the compass
variance as described in this group.
R E M O V A L A N D I N S T A L L A T I O N
OVERHEAD CONSOLE
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the two console mounting screws (Fig.
3)..--
J908E-27
Fig. 2 Roof Demagnetizing Pattern
(3) Plug in the degaussing tool, while keeping the
tool at least two feet away from the compass unit.
J948G5
Fig. 3 Console Mounting Screws