Buick LeSabre 1965 Service Manual page 855

1 1 - 1 2 2 GUIDE-MATIC POWER HEADLAMP CONTROL ACCESSORIES
(d) Set Aiming Device No. 6 on
top of phototube unit as shown in
Figure 11-168.
(1) The three points on aiming
device must be resting on top of
phototube unit.
(2) The aiming device must be
touching front of phototube unit.
(e) Set aiming dial of aiming de-
vice to 6.
(f) Adjust vertical aim screw
until bubble is centered in level.
2. Dim and Hold Sensitivity
Tests
CAUTION: Phototube unit must
be covered with a black cloth
during test. Tests of adjustments
on the Guide-Matic should be
made with the phototube unit be-
low 100°F. If car has been in the
sun immediately prior to check-
ing, allow it to cool in a covered
place for approximately one hour
before the check is actually made.
(a) Preparation for Tests
(1) Set driver sensitivity control
to d e t e n t p o s i t i o n (fully
counte rclockwise).
(2) Install Tester Lamp. (Use
Kent-Moore Model J-8465). See
Figure 11-167.
(3) Start engine and operate at
fast idle while making adjust-
ments.
(4) Turn headlamps on and wait
at least 5 minutes for amplifier
unit to stabilize. Place foot switch
in automatic position.
(5) Turn zero corrector on face
of meter until meter pointer is
on ZERO SET line. See Fig-
ure 11-167.
(6) Turn T e s t e r INTENSITY
CONTROL counterclockwise.
(7) Connect b a t t e r y leads of
Guide-Matic tester to b a t t e r y
terminals.
(b) Dim Sensitivity Test
(1) Rotate t e s t e r INTENSITY
CONTROL completely counter-
clockwise.
(2) Turn DIM-HOLD switch to
HOLD position and then back to
DIM position. Headlamp should
be on upper beam.
(3) Turn t e s t e r INTENSITY
CONTROL clockwise slowly just
to point where headlamps switch
to lower beam. The meter pointer
should now read in the black
DIM ADJ. range on the meter
scale. See Figure 11-167. If not,
proceed to the hold and dim
sensitivity adjustments.
(c) Hold Sensitivity Test
(1) Turn INTENSITY CONTROL
all the way clockwise.
(2) Turn DIM-HOLD switch to
DIM position and back to HOLD
position to obtain a lower beam.
(3) Slowly turn INTENSITY
CONTROL counterclockwise just
to the point where headlamps
switch to upper beam. The meter
pointer should now read in the
green HOLD ADJ. range on the
meter scale. See Figure 11-167.
If not, proceed to the hold and dim
sensitivity adjustments.
3. Hold and Dim Sensitivity
Adjustments
CAUTION: Hold sensitivity must
be properly adjusted before ad-
justing dim sensitivity. Phototube
unit must be covered with a black
cloth during adjustments.
(a) Preparation for Adjustments.
Same as preparation for tests
above.
(b) Hold Sensitivity Adjustment
(1) Hold and dim sensitivity con-
trols are slotted for screwdriver
adjustment and are located at the
side of the amplifier unit. See
Figure 11-169.
(2) Rotate the amplifier hold con-
trol completely clockwise.
(3) Rotate t e s t e r INTENSITY
CONTROL all the way clockwise.
(4) Turn DIM-HOLD switch mo-
mentarily to DIM position to
switch lights to lower beam, then
switch back to HOLD position,
position.
NOTE: If lights do not switch
to lower beam, the amplifier dim
control must be turned completely
clockwise and then readjust after
hold adjustment is correct.
(5) Adjust INTENSITY CON-
TROL s l o w l y counte rclockwise
until meter pointer is on HOLD
ADJ. line. See Figure 11-167.
(6) Turn amplifier hold control
slowly counterclockwise just to
the point where headlamps switch
to upper beam. Do not go beyond
this setting.
(7) Re check sensitivity as shown
in Steps (1) through (3) under
Hold Sensitivity Test.
(c) Dim Sensitivity Adjustment
NOTE: Dim sensitivity should
not be adjusted until after hold
sensitivity is properly adjusted.
(1) Rotate amplifier dim control
completely counterclockwise. See
Figure 11-169.
(2) M o m e n t a r i l y turn DIM-
HOLD switch to HOLD then back
to DIM position to obtain upper
beam. See Figure 11-167.
(3) Adjust t e s t e r INTENSITY
CONTROL until meter pointer is
at DIM ADJ. line. See Figure
11-167.
(4) Slowly rotate amplifier dim
control clockwise just to point
where headlamps switch to lower
beam. Do not go beyond this
setting.
(5) Re check sensitivity as shown
in Steps (1) through (3) under
Dim Sensitivity Test. If sensi-
tivity is not correct, repeat ad-
justment procedure.
(6) If adjustment is correct, turn
off headlamps and disconnect
Kent-Moore tester.
(7) Remove tester lamp from the
phototube unit.