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)(Inches) 8/ / / / / / / (Gauge)(Inches)

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

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)

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

Callout NumbersZone Description Engine compartment (All forward of the dash panel) are additional for the engine compartment (Only to be used if all items are used) Within the instrument panel area Passenger compartment (From instrument panel to the rear wheelhouse) Luggage compartment (From the rear wheelhouse to the rear of the vehicle Within the left front door Within the right front door Within the left rear door Within the right rear door Within the liftgate or endgate door

CONNECTOR END VIEWS

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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