Chevrolet 70 Series 1970, Service Manual

Page: 786 / 841

CH
EV
RO
LE
T
SER
IES
70-
90
HE
AV
Y
DU
TY
TR
UC
K
SH
OP
M
A
N
U
A
L
STOP SWITCH
EMERGENCY PARK BRAKE
STOPLIGHT SWITCH
R.PO. J 7 4
(STD.-MH/MI/CH/tl 9 0 )
T R A IL E R EMERGENCY
STOPLIGHT SWITCH
R.PO. J 9 I
R.PO J7 4 $ J91
MIRROR-DUAL HEATED
R.PO. D 47
(M I/M H 90 ONLY)
JACAB ENGINE BRAKE
R.PO. K 4 0
(M I/ M H 9 0 ONLY)
BACK-UP LPS.
20A.
ACC.
— CD----------R.H. FfiT. DIR. I
*s
STOP -TAW.
S DlR.LR
U K STOP TAIL
a
d i r . l p
{ - — /4 W H T — (=>
—
I 4 W H T — 4
---- 1 "
W H T -
-
- I 4 0 R N —*=Z— / * O R f lf
--- o O-----
I 4 W H T
----A
~ >4 0 R N
-------------- -6 F ° 0 |
EM£RG. PARK
AIR STOP SW. BRKE. STOP LT SW.
y-----!8 LT. --->
* c£------------- 18 LT. CRN. -----------------
R.H. HEATED MIRROR
~ / 8 B if f . ---- 6----- 18B L K . — c :>
L.H. HEATED MIRROR
R.PO. I---------
K4 7 „ -5> COMMON
• - 16 BRN. WHT. T R .-& ' O— 16 BLUE WHT. CR- Tf?.-c*r ~. 16 BLUE WHT. CR. TR.- c i > /6 B L K . - *
ENGINE CLUTCH SW.
BRAKE SW. NOTE-SW. CONTACT SHOWN IN
CLOSED POSITION WITH CLUTCH
PEDAL
IN
NORMAL POSITION.
— \ ; ENGINE BRAKE UNIT
ENGINE BRAKE UNIT
-1 6 CRN. WHT. CR. TR. -
-
0
^
0
-
4 (4 y /6 6RN. WHT.CR. TR. -
BACK-UP
' LR SW.
— : 18 BL K . ------- R.H.
BACK-UP LPS.
- G B LK . ------------- © - f r L.H.
Figure 37— Cob, Engine, and Chassis Wiring—HI, Jl, MH, MI-90
Sheet 5 of 7
C
H
A
SS
IS
EL
EC
T
R
IC
A
L
AN
D
IN
ST
R
U
M
EN
T
S
1
2
-4
0