As the title says, when I select 4th gear the reverse lights go on (reverse also triggers them ).
It's on a rod change box.

What's worn out or broken and how do I fix it


Right now I have unplugged the wires going to the sensor and hooked them up to a switch in the cab.

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Respect mine and I'll respect yours.

my sisters clubman was doing that too. turns out it was just the reverse switch was tightened up just half a turn too tight.

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88 Rover 1.3i "Reggie"
99 Rover 1.3i “Grover”
12 Mini Cooper S "The shitter"
17 Mini Clubman JCW “Noddy”