Chevrolet 70 Series 1970, Service Manual

Page: 815 / 841

CH
EV
RO
LE
T
SER
IES
70-
90
HE
AV
Y
DU
TY
TR
UC
K
SH
OP
M
AN
UA
L
CONTROL SW ITCH
E L E C T R IC TACHO.
R.RO. U16
ENGINE O VERSPEED
T E L L - T A L E
D IF F LOCK
T E L L - T A L E
O IL P R E S S . GAUGE
WATER TEM P GA.
F U E L GAUGE
LOW AIR WARNING
T E L L - T A L E
LOW O IL WARNING
T E L L-T A LE
LOW A IR ALARM
BU ZZER
(1.52 ±07 OHM) - V-6 CYL ENG
[1.80+05 OHM)-INLINE
6
CYL ENG
[ l.S 5 t0 5 OH M )-V-8 CYL ENG
SPARK PLUGS (L.H.S])
HI TENSION Wifi
K E Y PO SITIO N C IR C U IT
START
IGN.,BAT ( SOL. CONNECTED
G1 ? G2 GROUNDED
RUN IGN.,BAT fAC C . CONNECTED
OFF LOCKED OPEN
ACCESSORY BAT i ACC. CONNECTED
-1 8 OK BLUE ■
ENGINE
OVERSPEED T. T-
DIFE LOCK T.T.
OIL PRESS. GA.
WATER TEMR GA.
LOW AIR T. T.
LOW OIL T. T.
18 P IN K -------@ -
DISTRIBUTOR
1 6 5 -4-3 2 V-6 CYL. ENG. (SHOWN)
FIRING ORDER 1-5-3-6 2-4 INLINE 6 CYL. ENG.
1-8 4 3 6-5-7 2 V-8CYL. ENG.
t t t
6 4 2
SPARK PLUGS (R.H.S.)
-CT>
O V E R S P E E D SW.
o — {:• D iF E L O C K SW.
(TANDEM AXLE)
O IL PR ESS SENDER
—o -T — t W ATER T E M P
q j q S EN D ER
/Jo V ------------- 16 B L K -------- — >8 BR N ------------- O V A ] F U E L GA TA N K U N IT
W V±^/
8
SLK— ti'
B -il' LOW A IR SW.
- I8 8 L K YELL STR
---
6 B L K --------------t r I '<H:' LOW O IL SW.
“ (STD-ALL MODELS)
EXCEPT TM/W M7500A
LOW A IR A L A R M
B U Z Z E R
(R.RO. J 6 3 )
LOW AIR T. T.
LOW AIR SW :r
F ig u r e 4 3 — C a b ,
Engine,
a n d C h a s s is W i r i n g — T M 8 0
S h e e t 2 o f 6
C
H
A
S
S
IS
ELECTRICAL
A
N
D
INS
TR
U
M
E
N
TS
1
2
-6
9