Exterior Lights Circuit Description Domestic

Voltage is always available to the TCC/stoplamp switch from the STOP fuse through CKT 140 (ORN). When the brake pedal is pressed, the TCC/stoplamp switch contacts close, and voltage becomes available on CKT 17 (WHT) to the stoplamps and also to the turn signal switch. The turn signal switch has provisions for connecting to trailer stoplamps through CKT 19 (DK GRN) and CKT 18 (YEL). The center high-mounted stoplamp is a diode array assembly. The BLK wires are ground wires for the components.

When the headlamps or parklamps are turned on, CKT 9 (BRN)) distributes voltage from the headlamp switch to the front park lamps, front marker lamps, taillamps, and the rear licence plate lamps. The BLK and BLK/WHT wires are ground wires for the components.

The turn signal switch is part of the multifunction switch on the steering column. The turn signal lamps and the hazard lamps are the same lamps, and they both utilize the turn/hazard lamp flasher. Turn signal voltage (through the TURN/BU fuse) is only available when the ignition switch is in the START or RUN positions, and the turn signal circuit will only flash the bulbs on the selected side of the vehicle.

Turn signal lamp voltage is provided from the TURN/BU fuse through CKT 139 (PNK) to the normally closed contacts of the turn signal switch. The CKT 62 (LT GRN) connects the turn signal switch to the turn/hazard lamp flasher. The turn/hazard lamp flasher continuously opens and closes the circuit until the turn signal switch is moved to the OFF position. Current flows from the flasher through the CKT 16 (PPL) back to the turn signal switch.

The HAZARD fuse supplies voltage at all times through CKT 1040 (ORN). When the hazard warning switch is pressed, voltage is available to the turn/hazard lamp flasher through the CKT 1508 (LT BLU). From the flasher, CKT 16 (PPL) returns to the turn signal switch. Voltage is distributed on both CKT 15 (DK BLU) and CKT 14 (LT BLU) to the lamps and indicators. The hazard circuit will flash front and rear bulbs on both sides of the vehicle. The BLK and BLK/WHT wires are ground wires for the components.

Exterior Lights Circuit Description Export

When the brake pedal is depressed, the TCC/stoplamp switch contacts will close in order to light the stoplamps. The TCC/stoplamp switch voltage is always available from the STOP fuse 1 through the ORN 140 wire. When the brake pedal is depressed and the switch contacts close, the voltage becomes available on the WHT 17 wire. The WHT 17 wire distributes the voltage to the following components:

The CHMSL is a diode array assembly. The WHT 17 wire provides voltage to the following components:

This circuit is used for the trailer wiring provision when the single bulb turn/stoplamps are wired. The switch logic enables a single bulb on the DK GRN 19 or the YEL 18 wires in order to operate as a turn signal lamp while the brake pedal is depressed.

The left and right tail lamps contain the following bulb types:

Both bulbs in the left tail lamp are grounded by the BLK 150 wire to ground G400. Both bulbs in the right tail lamp are grounded by the BLK 250 wire to ground G401. The CHMSL is grounded by the BLK 150 wire to ground G400.

The park, auxiliary side front marker, and licence lamps are energized whenever the headlamp switch is in one of the following positions:

The voltage is available at all times to the headlamp switch from the PARK LPS fuse 9 through the BRN 240 wire. When the switch is not in the OFF position, this voltage is available on the BRN 9 wire.

The BRN (9) wire distributes this voltage to the following components:

For vehicles using sealed beam headlamps, the following components are present on each side of the vehicle:

For vehicles using composite headlamps, the following components are present on each side of the vehicle:

The BLK 150 wire to ground G108 provides the grounding for the following

The BLK 151 wire to ground G109 provides the grounding for the following components:

The BRN (1256) wire from the daytime running lamp relay distributes the voltage to the following components:

A single park lamp bulb is in each of the following components:

The BLK 150 wire to ground G400 provides the grounding for the following components:

The BLK  250 wire at ground G401 provides grounding for the following components:

The turn signal lamps and the hazard lamps are the same lamps. When operating the turn signal lamp, only 2 bulbs on the selected side of the vehicle will flash. When operating the hazard lamp, all 4 bulbs will flash.

When operating the turn signal lamp, the power is provided from the TURN B/U fuse 16 through the PNK 139 wire to the normally closed contacts of the hazard warning switch. This voltage is only available when the ignition switch is in the START/RUN positions. The LT BLU 1508 wire to the turn/hazard lamp flasher carries the normal position voltage when the hazard/warning switch is depressed to the down position.

The turn/hazard lamp flasher operates as an automatic-reset thermal switch. When the current passes though the flasher for a period of time, the following conditions may occur:

This stops the current, allowing the flasher to cool down. When cool, the internal contacts close again in order to allow the current to flow. While the current is flowing, the voltage is available through the flasher through the PPL 16 wire to the following components:

The hazard warning switch contacts remain open.

The turn signal switch is part of the multifunction switch. When the turn signal switch is in the left turn (down) position, the voltage is available and distributed by the LT BLU 14 wire. The voltage is provided to the turn signal bulb in the left front park and turn signal lamps. The current flows through the lam-ps and the BLK 150 wire to ground G108. The voltage is provided to the turn signal bulb in the left rear park and the turn signal lamp. The current flows through the lamp and the BLK 150 wire to ground G400. The LT BLU 14 wire makes this voltage available at the left turn indicator bulb in the instrument cluster. Since the bulb is grounded by the BLK wire to ground G201, the left turn indicator flashes as the exterior turn signal lamps flash. The LT BLU 14 wire provides this voltage to the optional trailer wiring provision connector, if provided.

When the turn signal is in the right turn (up) position, the voltage is available and distributed by the DK BLU 15 wire. The voltage is provided to the turn signal in the right front park and turn signal lamps. The current flows through the lamps and the BLK/WHT 151 wires to ground G109. The voltage is provided to the turn signal bulb in the right rear park and turn signal lamp. The current flows through the lamp and the BLK 250 wire to ground G401. The DK BLU 15 makes this voltage available at the right turn indicator bulb in the instrument cluster. Since the bulb is grounded by the BLK 150 wire to ground G201, the right turn indicator flashes as the exterior turn signals lamps flash. The DK BLU 15 wire provides this voltage to the optional trailer wiring provision connector C406.

When the hazard warning switch is depressed, the normal voltage source from the TURN B/U fuse 16 on the PNK 139 wire is isolated by the open contacts. The hazard warning switch's normally open contacts close in order to connect to a voltage source that is available at all times. The lamps are operated by a voltage from the HAZARD fuse 5 carried through the ORN 140/1040 wire to the hazard warning switch. This voltage is made available to the turn/hazard lamp flasher through the LT GRN 1696 wire. From the flasher, the PPL 16 wire carries this voltage to both the turn signal switch and the hazard switch contacts. The hazard switch contacts are now closed and the voltage is distributed on both the DK BLU 15 and the LT BLU 14 wires to the lamps and indicators. The turn signal switch position has no impact. Since the ground paths are provided, the current flows and the flasher cycles the internal contacts open and closed.