Final answer:
The clearance/side markers circuit on the trailer 7 way power connector follows a standard color code, which is brown in North America according to the TM-1 standard set by the SAE.
Step-by-step explanation:
The clearance/side markers circuit on the trailer 7 way power connector follows a standard color code. In North America, the wire color code for the clearance/side markers circuit is brown. This is consistent with the TM-1 standard set by the Society of Automotive Engineers (SAE).