Circuit Description

The park lamp are operated by the headlamp switch or twilight sentinel feature. When the headlamp switch is in the PARK position it sends a ground signal to the BCM. The BCM receives the ground signal from the headlamp switch and then sends a ground signal to terminal 1 of the park lamp relay K130 energizing the relay coil. The headlamp switch also sends a redundant ground signal to terminal 1 of the park lamp relay K130. The BCM supplies voltage to the park lamp relay coil via the exterior lamps power circuit.

Fused battery voltage is supplied at all times to park lamp relay internal switch contacts. When the park lamp relay K130 is energized the internal switch closes. The park lamp relay supplies B+ is to fuses #23, #26 and #30 Fuse #23 supplies B+ to the LH park lamp and the LH outside taillamp. Fuse #30 supplies B+ to the RH park lamp and the RH outside taillamp. Fuse #26 supplies B+ to the LH and RH front side marker lamps, the LH and RH rear license lamps, and the LH and RH inside taillamps.

The LH and RH park/turn signal lamps are permanently grounded to G103. The LH and RH inside taillamps are permanently grounded to G400. The LH and RH stop taillamps are permanently grounded to G400. The LH and RH rear license lamps are permanently grounded to G400. The LH front side marker lamps are grounded in series parallel with the LH front [1][2]turn signal lamp and the RH rear turn signal lamps. The RH front side marker lamps are grounded in series parallel with the RH front turn signal lamp and the RH rear turn signal lamp.

All of the exterior lamps (including the front side marker lamps) will illuminate when the park lamp relay is energized., Because the front side marker lamps are wired in series with the turn signal lamps they will not illuminate when B+ is applied to the turn signal lamps. When the turn signals flash the front marker lamps will not illuminate and then front side marker lamp will illuminate when the turn signals go off.