Why on a 2001 Toyota Echo ten amp gauge fuse blows when you put it in reverse?

A ten amp gauge fuse blowing when putting a 2001 Toyota Echo in reverse could indicate a short circuit or an overload in the reverse light circuit. This may be due to damaged wiring, a faulty reverse light switch, or a problem with the reverse lights themselves. Inspecting the wiring and components in that circuit can help identify the exact cause of the issue. If the problem persists, consulting a mechanic is advisable for further diagnosis.