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Refer to FMVSS 108 for trucks, busses and MPV's:
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Especially look at positions 5a, 6 and 7 (Rear Side Marker Lamps, Rear Clearance Lamps and Rear Identification Lamps respectively).
A list of affected vehicles:
- box (all variants)
- bus_s
- f350
- greyhound_mc12
- package_van
- solera
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