Turn Signal Lamps

When the ignition switch is in RUN and the turn signal/hazard switch is in a turn position, battery positive voltage (B+) is applied from the underhood fuse block T/SIG fuse through the turn signal/hazard switch to the respective turn signal flasher input. The turn signal flasher receives battery positive voltage (B+) at all times from the underhood fuse block HZDT/SG fuse. The turn signal flasher supplies battery positive voltage (B+), in an intermittent on and oft pattern, to the respective front turn signal lamps and side marker lamps through the underhood fuse block. The turn signal flasher also supplies battery positive voltage (B+) in an intermittent on and off pattern to the respective rear turn signal lamps and rear side marker lamps through the rear fuse block. The respective turn signal indicator on the instrument cluster will flash continuously while the turn signal/hazard switch is in the turn position. Battery positive voltage (B+) is supplied via CKT 685 (YEL) to the left turn lamps and via CKT 686 (TAN) to the right turn lamps.

The front side marker lamps are wired with power circuits on both sides. The left front side marker lamp is supplied power by CKT 709 (PPL) and CKT 685 (YEL). The right front side marker lamp is supplied power by CKT 309 (BRN/WHT) and CKT 686 (TAN). When the park lamps are on and a turn is indicated, these side marker lamps flash on and off opposite of the other park/turn lamps. When the turn signal flasher supplies battery positive voltage (B+) to the front side marker lamps, they turn off because the Lamp Control Module (LCM) also supplies battery positive voltage (B+) to the front side marker lamps and there is no net voltage across the lamps. When the turn signal flasher removes battery positive voltage (B+) from the front side marker lamps they become grounded on that side and light due to the battery positive voltage (B+) supplied by the LCM.