Chevrolet 1977 light duty truck, Service Manual

Page: 613 / 861

D I A G N O S I S
HIGH ENERGY IGNITION SYSTEM V8 engine
PROBLEM:
engine CRANKS but
WILL NOT START
CO IL ( 7
3-WIRE
CONNECTOR
STEP
SEQUENCE
R O T O R ( 6
MO DULE
PICK-UP COIL
RESULT
A U T O T R A N S .
L E V E R IN P A R K
M A N U A L T R A N S .
L E V E R IN N E U T R A L
C O N N E C T T E S T L I G H T /
T O BAT. L E A D
T E R M .
T E S T L IG H T
O N
T E S T L IG H T
O F F
T E S T L IG H T R E P A IR T E S T L IG H T
O F F L E A D OR ON
C O N N E C T O R
S T A R T S
I___
IN S E R T T E S T L IG H T
IN R E D B+ W IR E
N O S T A R T
T E S T L IG H T
ON
IG N IT IO N SW.
- ~ Q )
--------( ^ )
0 — < D “
R E P A IR OR
R E P L A C E AS
N E C E S S A R Y
T E S T L IG H T |
ON |____
S T A R T S
O
N O S T A R T
R E M O V E A S P A R K P L U G W IR E ,
IN S E R T E X T E N S IO N A N D
P E R F O R M S P A R K T E S T
U S IN G IN S U L A T E D P L IE R S
H O L D S P A R K P L U G W IR E 1 /4 '
A W A Y F R O M E N G . B L O C K
W H IL E C R A N K IN G E N G IN E
NO
S P A R K
E X T E N S IO N
S P A R K
P R O B L E M IS
N O T IG N IT IO N
S Y S T E M
C H E C K
F U E L S Y S T E M
• P L U G S
• F L O O D E D