GMC 1982 Light Duty Truck Service Manual page 300

3B4-1 2 STEERING COLUMNS
CONDITION
T u rn signal w ill n o t cancel
T u rn signal d iffic u lt
to o p e ra te
T u rn signal w ill n o t
in d ic ate lane change
T u r n signal w ill n o t stay
in tu r n p o s itio n
H a za rd sw itch c a n n o t
be tu rn e d o ff
S IG N A L S W IT C H D IA G N O S IS
P O S S IB L E C A U S E
A. Loose sw itch
m o u n tin g screws
S w itc h o r a n ch o r
B.
bosses b ro k e n
B ro k e n , missing o r o u t
C.
o f p o s itio n d e te n t, re tu rn
o r cancelling spring
U n even or in c o rre c t
D .
can cellin g cam to
cancelling spring
in te rfe re n c e .
( .1 2 0 )/s id e
A . A c tu a to r rod loose
B. Y o k e b ro k e n or
d is to rte d
C. Loose o r m isplaced
springs
Fo reign parts
D.
a n d /o r m aterials
S w itc h m o u n te d
E.
loosely
A .
B ro k e n lane change
pressure pad o r
spring hanger
B. B ro k e n , missing or
m isplaced lane change
spring
C. Jam m ed base o r w ires
A . Foreign m ate rial o r
loose parts im p e d in g
m o v e m e n t o f y o k e
B. B ro k e n or missing
d e te n t o r c an c e llin g springs
C. N o n e o f th e above
A.
Fo reig n m ate rial
b e tw e en hazard
su p p o rt cancelling
leg and y o k e
Fig. 3B 4-13~T urn Signal S w itch Diagnosis C hart A
CORRECTION
T ig h te n to sp ec ified
A .
to rq u e (2 5 in-lbs)
B. R eplace sw itch
R e p o s itio n o r rep lace
C.
springs as re q u ire d
A d ju s t sw itch p o s itio n
D.
1. If in te rfe re n c e is
c o rre c t an d sw itch
w ill still n o t cancel,
replace s w itc h .
2. If in te rfe re n c e
c a n n o t be c o rre c te d
by sw itch
a d ju s tm e n t, replace
c an cellin g c am .
A . T ig h te n m o u n tin g
screw (1 2 in -lb )
Replace sw itch
B.
R e p o s itio n o r replace
C.
springs
D . R em ove fo re ig n parts
a n d /o r m a te ria l
T ig h te n m o u n tin g
E.
screws ( 2 5 in-lbs)
A. R eplace s w itch
B. Replace o r re p o s itio n
as re q u ire d
Loosen m o u n tin g
C.
screws, re p o s itio n
base o r w ire s and
re tig h te n screws (2 5 in-lbs)
A . R e m o ve m a te ria l
a n d /o r parts
B. R eplace spring
R eplace sw itch
C.
A. R em o ve fo re ig n m a te ria l
1. N o fo re ig n m a te ria l
im p e d in g fu n c tio n
o f h a zard sw itch
— rep lace tu r n
signal sw itch