Chevrolet Light Duty Truck 1978 Service Manual page 41

CIRCUIT
OFF
B A T -O N L Y
LO
BA T -LO
MED
BAT -M ED
HI BA T -H I
HI
MED
<CQ
C T T
cscs
in^n
LO
5 0
BAT
J
BLOWER
SWITCH
INST. PANEL HARN
CIRCUIT#4 (ACC)
2 5 A M P IN FUSE PANEL
HEATER O PERATION
BAT -BLO SW-RES Rl R 2 ,
LO
BLO MTR-GRD
B AT -BLO SW-RES Rl-
MED
BLO MTR-GRD
BA T -B LO SW-
HI
BLO M TR-G RD
■16 LBL*
16 ORN
TT
or
5 2J
1 4 ORN
Fig. 1 A -5 -H e a te r W irin g D ia g ra m s
16 YEL
I VJ I P I
' •—
FUSE I I !52| . 5 2 f
PANEL I i
L---I
^
JU N C T IO N BLOCK
BLOWER
RESISTOR
DASH
(IN ENG H A R N )
—I Q
C O t -
Q to
X BULKHEAD C O N N
CO ^
! o
j f 2
BLOWER
M O TO R
J t n
1
t