Running lights and DOT question
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Elder User
Joined: Apr 2004
Posts: 502
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From: Harker Heights, TX
Running lights and DOT question
What are the purpose of running lights? They came with my truck so I did not really get a choice in the matter but just curious.
Also, I have seen some heavy duty pick up trucks with "DOT [bunch of numbers]" labeled on both sides of the truck. Do we need this to tow trailers or only if we exceed a certain weight limit? I have only seen it on a couple trucks with trailers.
Also, I have seen some heavy duty pick up trucks with "DOT [bunch of numbers]" labeled on both sides of the truck. Do we need this to tow trailers or only if we exceed a certain weight limit? I have only seen it on a couple trucks with trailers.
Elder User
Joined: Feb 2003
Posts: 755
Likes: 0
From: Meriden Ct
As Mil1ion said
Three bar ID light facing rear required on vehicles over 80". Lights to be spaced 6" to 12" apart. Same rule on the front. (cab lights)
The DOT number on the door is A FED ID #. It is required on commercial vehicles. If you truck/trailer is not for hire and non commecially owned, no FED ID # needed.
Rules posted at
DOT.GOV
NHTSA.DOT.GOV
Three bar ID light facing rear required on vehicles over 80". Lights to be spaced 6" to 12" apart. Same rule on the front. (cab lights)
The DOT number on the door is A FED ID #. It is required on commercial vehicles. If you truck/trailer is not for hire and non commecially owned, no FED ID # needed.
Rules posted at
DOT.GOV
NHTSA.DOT.GOV
