Turn Signal and Hazard Lamps

The turn signal lamps and the hazard lamps are the same lamps. When operating the [1][2]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 [1][2]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:
- The flasher heats up.
- The flasher operates the internal contacts.

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 turn signal switch
- The hazard warning switch contacts

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 lamps and the BLK 150 wire to ground G108. The voltage is provided to the turn signal bulb in the left rear park and the [1][2]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 [1][2]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.