Circuit Description

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

The front side marker lamps are wired with power circuits on both sides. The LH front side marker lamp is supplied power by CKT 709 (PPL) and CKT 685 (YEL). The RH 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 being indicated, these side marker lamps will flash on and off opposite of the other park 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) is also supplying battery positive voltage (B+) to the front side marker lamps and there no net voltage across the lamps. When the turn signal flasher removes battery positive voltage (B+) from the front side marker lamps, the> become grounded on that side and then light due to the battery positive voltage (B+) supplied by the LCM.