Were any fuses blown? There are lighting trouble codes, so you may have to get the B type codes checked, all codes. Voltage for the tail lamps comes from the park lamp relay. I'd have to check voltage and ground circuits at the relay, the relay itself may be ok. The BCM controls the ground for the coil side of relay. The bcm monitors sense circuits, one from the light sensor, the other from the headlamp switch. I can't tell you exactly where the problem is without testing?
Monday, July 1st, 2019 AT 4:05 PM
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