Chevrolet 70 Series 1970, Service Manual

Page: 780 / 841

CHASSIS ELECTRICAL AND INSTRUMENTS 12-34
fla sh e s in one p osition but not the other, check for
the following:
1. D irection al lamp bulb or indicator bulb
burned out.
2. In correct directional lamp bulb in stalled .
3. D efective ground between bulb sock et and
mounting.
4. D efective d irection al control sw itch a s ­
sem b ly.
If d irection al te ll-t a le on instrum ent panel
d oes not flash in either direction, check for the
following:
1. Burned out fu se on fu se block.
2. D efectiv e fla sh er o r fla sh er te rm in a ls not
p rop erly engaged in junction block.
3. D irection al te ll-ta le bulb on instrum ent
panel burned out.
4. Short or open circu it. Check indicator lamp
c ir c u it referrin g to applicable W iring D iagram .
5. D efectiv e directional control sw itch a s ­
sem b ly.
If directional t e ll-ta le ligh t does not cancel
after com pleting a turn (except S e r ie s 9502 tilt
cab m odels), rem ove the steerin g w heel a s ex­
plained in "MECHANICAL STEERING" (SEC. 9A)
of th is manual and check for a worn or damaged
can cellin g cam .
LIGHT BULB DATA
BULB NO.
CAN D LE-PO W ER
H E A D L A M P
D u al S e a le d -B e a m U n its
Inside Lig h t (T y p e 1 ) ..............................................................................................
4 0 0 1 ( L ) *
371/2
W atts
O u tsid e Lig h t (T y p e 2 ) ..........................................................................................
4 0 0 2 (L ) * 37>/2 -50 W atts
S in gle S e aled -B ea m U n i t .................................................................................................
6 0 1 3 (L > *
45-50 W atts
P A R K I N G L I G H T S (W hen U s e d ).........................................................................................
67 4
D I R E C T I O N A L S I G N A L L I G H T S
C om bin ation P a rk and D irec t. S i g .........................................................................
115 7
32-3
D ou b le Faced Directional and Side M a rk e r ................................................
1156 32
S ide M a rk e r L i g h t .......................................................................................................
5 7 X
2
F R O N T M A R K E R L I G H T S ...........................................................................................................
6 7 or 115 5
4
S T O P , T A I L A N D D I R E C T I O N A L L I G H T ...............................................................
1 1 5 7
32-3
B A C K - U P L I G H T ....................................................................................................................................
1156
32
L I C E N S E L I G H T ........................................................................................................................
67
4
I N S T R U M E N T A N D T E L L - T A L E L I G H T S ..............................................................
53 or 57 1 or 2
D O M E L I G H T
Except Alum . T ilt Cab M o d e ls ......................................................................................
2 1 1 12
Alu m . Tilt Cab M o d e ls .......................................................................................................
1 4 1 1 21
H I - B E A M T E L L - T A L E L I G H T .......................................................................................
E xc e p t Steel T ilt Cab M o d e ls ....................................................................................
57
1
Steel T ilt Cab M o de ls.........................................................................................................
667582
1
CHEVROLET SERIES 70-90 HEAVY DUTY TRUCK SHOP MANUAL