Cadillac 60 Series 1963 Shop Manual page 365

12-84
ELECTRICAL SYSTEM
NOTE: If headlights operate as outlined in
these tests, the unit should operate correctly,
provided aiming and sensitivity adjustments are
set properly. If Guide-Matic cannot be serviced
immediately, lights can be converted to foot
dimmer switch operation by rotating control
knob on phototube unit counterclockwise to OFF
position. Also, the unit can be completely dis-
engaged by disconnecting the fuse at the am-
plifier unit.
104. Vertical Aiming Procedure
Accurate vertical aim is essential to proper
performance of the Guide-Matic. If the phototube
unit is aimed too low, reflected light from its own
headlights can cause the Guide-Matic to hold the
headlights on low beam
o
The unit must be aimed
as low as possible, however, to provide maximum
tolerance for car loading.
NOTE: The aiming procedure outlined here
should be rechecked on new cars that have been
driven 2,000 miles.
1. Phototube unit vertical aiming should be
performed with car unloaded, trunk empty except
for spare tire, gas tank at least half full, and tires
at correct pressure.
2. Locate car on a level floor (level within 1/4
inch fore and aft).
3. Rock car sideways or up and down to equal-
ize springs.
4. Install Aiming Device No. 6, part of Tester,
J-8465, on phototube unit, Fig. 12-101, with three
points on Aiming Device resting on top of photo-
tube unit, and the Aiming Device touching front of
unit.
5. Adjust dial on Aiming Device until the
number 6 is under pointer.
6. Adjust vertical aiming screw on phototube
unit until bubble is centered in level, Fig. 12-101.
105. Dim and Hold Sensitivity
Test on Car
Use Guide-Matic Tester, J-8465, for all tests.
Phototube unit must be covered with a block cloth
during test. Tests or adjustments on the Guide-
Matic must be made with the phototube unit below
100°F. If car has been in the sun immediately
prior to checking, allow it to cool in a covered
place for approximately one hour before the check
is actually made.
a. Preparation for Test
1. Set driver control to Detent position.
2. Install Tester Lamp, Fig. 12-102, and cover
unit with black cloth.
3. Turn headlights on and wait at least 5
minutes for amplifier unit to stabilize.
4. While making adjustments, start engine and
operate at fast idel to maintain constant voltage.
5. Ratchet foot switch to automatic position.
6. Adjust meter p o i n t e r on zero set line,
Fig. 12-103.
7. Connect battery leads of Tester to battery
terminals, red to positive and black to negative.
Aim
<
Figure
*6
At
on Face of Knob
dm
" ^ V e r t i c a l
1
Aim
Aiming Dial
T \
^ Aiming
1 Device No. 6
)
Screw
Tester Lamp
Connect Leads to
Battery Terminals
Guide-Matic -
Tester J-8465
Zero Corrector
Fig. 12-101 Setting Aiming Device
Fig. 12-102 Preparations for Dim and Hold Sensitivity Test