Transcript Reading Wiring Schematics - WCS Automotive Mechanics

Wiring Schematics 101
Electrical Symbols
• Supplemental Inflatable
Restraint (SIR) or
Supplemental Restraint
System (SRS) Icon
• This icon is used to alert
the technician that the
system contains SIR/SRS
components that require
certain precautions
before servicing.
• Voltage Indicator
Boxes
• These boxes are
used on schematics
to indicate when
voltage is present at a
fuse.
• Partial Component
• When a component is
represented in a dashed
box, the component or its
wiring is not shown in its
entirety.
• Entire Component
• When a component is
represented in a solid box
the component or its
wiring is shown in its
entirety.
• Fuse
• Circuit Breaker
• Fusible Link
• Connector Attached to
Component
• Pigtail Connector
• Bolt On or Screw On
Eyelet Terminal
• Inline Harness Connector
• Splice
• Pass Through the
Grommet
• Chassis Ground
• Case Ground
• Single Filament Light
Bulbs
• Double Filament Light
Bulb
• Light Emitting Diodes
• Capacitor
• Battery
• Resistor
• Variable Resistor
• Position Sensor
• I/O Resistors
• I/O Switches
• Diode
• Crystal
• Heating Elements
• Motor
• Solenoid
• Coil
• Switches
• Single Pole Single Throw
Relay
• Single Pole Double
Throw Relay
AWG CHART
(Gauge)
8/0
7/0
6/0
5/0
4/0
3/0
2/0
0
10
11
12
14
16
(Inches)
0.7314
0.6514
0.5801
0.5166
0.4600
0.4096
0.3648
0.3249
0.1019
0.0907
0.0808
0.0641
0.0508
(Gauge)
18
19
20
21
22
23
24
25
26
27
28
29
30
(Inches)
0.0403
0.0359
0.0320
0.0285
0.0253
0.0226
0.0201
0.0179
0.0159
0.0142
0.0126
0.0113
0.0100
How to Use Electrical Schematics
•
Important
• The schematic does not
represent the components and
wiring as they physically appear
on the vehicle. For example, a
4-foot length of wire is treated
no differently in a schematic
from one which is only a few
inches long.
• When diagnosing a horn
problem use the service
information located in the Horns
service category. The following
schematic is a typical example
of a schematic with its
supporting text.
Schematics use a top (power) to
bottom (ground) sequence to
present electrical information.
Power Window
IP Fuse Block
Window Circuit
Breaker Amp
Hot in Run
343
2YEL
S305
D C301
P500
C2 L
2 DK BLU 164
S504
G110
Engine Controls Components
Name
Location
Locator View
Connector End View
On the lower left side of
Body Control
the IP below the steering
Module (BCM)
column
Body Control System
Component Views in Body
Control System
Body Control System
Connector End Views in Body
Control System
Camshaft
Position (CMP) In the distributor
Sensor
Engine Controls Component
Views
Engine Controls Connector
End Views
In the extension housing on
Vehicle Speed
Engine Controls Component
the left side of the
Sensor (VSS)
Views
transmission
Engine Controls Connector
End Views
C202
On the left side of the IP on
the back of the cluster
Harness Routing Views in
Wiring Systems
Inline Harness Connector End
Views in Wiring Systems
G100
Power and Grounding
On the left radiator support
Component Views in Wiring
bracket
Systems
--
G102
On the right front of the
engine block (4.3L)
--
--
G106
On the right front of the
engine block (4.3L)
--
--
P100
At the left rear of the
engine compartment in the
front of the dash
Power and Grounding
Component Views in Wiring
Systems
--
Splice Pack 203 On the top left side of the
(SP203)
IP near the A pillar
Harness Routing Views in
Wiring Systems
--
On the left side of the IP
Splice Pack 205
behind the headlamp
(SP205)
switch
Data Link Communications
Component Views in Wiring
Systems
Data Link Communications
Connector End Views in
Wiring Systems
S101
In the forward lamp
harness
--
--
S102
In the engine harness
--
--
S103
In the engine harness
--
--
FRT DOOR COMPONET LOCATOR
1
S504 (Left), S601 (Right)
2
S600 (Right)
3
S506 (Left)
4
S605 (Right
5
Front Power Window Switch Connector (C1)
6
Front Power Window Switch Connector (C2)
7
Power Door Lock Switch Connector
8
Front Door Lock Motor
9
Front Door Lock Motor Connector
10
S505 (Left), S603 (Right)
11
Speaker Connector
12
P500 (Left), P600 (Right)
Zoning
All grounds, in-line
connectors, passthrough grommets, and
splices have identifying
numbers that
correspond to where
they are located in the
vehicle. The following
table explains the
numbering system
Callout Numbers
Zone Description
100-199
Engine compartment (All forward of the dash panel)
001-099 are additional for the engine compartment (Only to be used if all 100-199 items are used)
200-299
Within the instrument panel area
300-399
Passenger compartment (From instrument panel to the rear wheelhouse)
400-499
Luggage compartment (From the rear wheelhouse to the rear of the vehicle
500-599
Within the left front door
600-699
Within the right front door
700-799
Within the left rear door
800-899
Within the right rear door
900-999
Within the liftgate or endgate door
CONNECTOR END VIEWS
Door Lock Switch Connector
Connector Part Information


12064998
8-Way Female M/P 280 Series
Pin
A
Wire Color
--
Circuit No.
--
Function
B
ORN
640
Fuse Output Battery Type 3 Fuse
C
BLK
1050
Ground
D
LT BLU
195
Power Door Lock Relay Feed Lock Coil
E
--
--
F
ORN
640
G
BRN
9
H
WHT
194
Not Used
Not Used
Fuse Output Battery Type 3 Fuse
Park Lamp Feed
Power Door Lock Relay Feed Unlock Coil
Power Windows Circuit Description
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A permanent motor operates each of the power windows. Each motor raises or
lowers the glass when voltage is supplied to the motor. The direction that the motor
turns depends on the polarity of the supply voltage that the switch provides.
The LH front power window master switch controls all of the window motors. The
passenger window also has a separate switch.
Each motor is protected by a built-in circuit breaker. The circuit breaker opens the
circuit if the window switch is held down too long and the following conditions apply:
The window is obstructed
The window is full up
The window is fully down
The circuit breaker automatically resets while cooling.
When the ignition switch is turned to the RUN position, CKT 343 (YEL) supplies
battery voltage to the LH front power window master switch.
When you operate any of the UP switches, battery voltage is supplied to the window
motor. the voltage is grounded through the DN contact. The motor runs in order to
drive the window up. When you operate any of the DN switches, battery voltage is
supplied to the window motor in the opposite direction. The window motor is
grounded through the UP contact. The motor runs in order to drive the window down.
TIME FOR EXTRA WORK