To want to go south but drive the shafts north — heading the wrong way.
Tips
culture
辕 is the wooden shaft of a cart. The idiom 南辕北辙 — 'shafts pointed south but tracks running north' — describes acting in a way that defeats your own goal.
The vehicle radical on the left, a simplified picture of a cart seen from above. It marks the character as a part of a cart — here the draft shaft. It groups 辕 with 轮, 轴, and 辙.