Two of the side marker lights were not working.. I managed with difficulty to remove the lights to find they had melted the plastic housing and cracked.......no one had apparently considered the heat the bulbs were radiating and the housings were distorted by the heat... Apart from having cracks to allow the heat to escape I drilled a rather crude hole top and bottom to allow the air to circulate through the sad looking fixture..When I re installed the lenses i adjusted the spring clip so next time I should be able to remove them more easilly......