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Published byRandolph Garrett Modified over 9 years ago
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Wiring Schematics 101
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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.
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Voltage Indicator Boxes These boxes are used on schematics to indicate when voltage is present at a fuse.
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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.
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Fuse Circuit Breaker
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Fusible Link Connector Attached to Component
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Pigtail Connector Bolt On or Screw On Eyelet Terminal
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Inline Harness Connector Splice
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Pass Through the Grommet Chassis Ground
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Case Ground Single Filament Light Bulbs
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Double Filament Light Bulb Light Emitting Diodes
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Capacitor Battery
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Resistor Variable Resistor
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Position Sensor I/O Resistors
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I/O Switches Diode
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Crystal Heating Elements
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Motor Solenoid
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Coil Switches
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Single Pole Single Throw Relay Single Pole Double Throw Relay
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AWG CHART (Gauge)(Inches) 8/00.7314 7/00.6514 6/00.5801 5/00.5166 4/00.4600 3/00.4096 2/00.3648 00.3249 100.1019 110.0907 120.0808 140.0641 160.0508 (Gauge)(Inches) 180.0403 190.0359 200.0320 210.0285 220.0253 230.0226 240.0201 250.0179 260.0159 270.0142 280.0126 290.0113 300.0100
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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.
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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
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FRT DOOR COMPONET LOCATOR 1S504 (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)
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Zoning All grounds, in-line connectors, pass- through grommets, and splices have identifying numbers that correspond to where they are located in the vehicle. The following table explains the numbering system
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Callout NumbersZone Description 100-199Engine 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) 200-299Within the instrument panel area 300-399Passenger compartment (From instrument panel to the rear wheelhouse) 400-499Luggage compartment (From the rear wheelhouse to the rear of the vehicle 500-599Within the left front door 600-699Within the right front door 700-799Within the left rear door 800-899Within the right rear door 900-999Within the liftgate or endgate door
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CONNECTOR END VIEWS
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Power Windows Circuit Description 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.
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TIME FOR EXTRA WORK
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