wicket

can anyone help me with this as ime a complete novice on electrics. ive connected a step down to my gaugemaster modelD controller via a distributor block and the regulator reading 24v input ive done the output to 6v to connect to a block of 6 toggle switches to work my lights when i switch the lights on 3 ok then switch the 4th and the regulator flicks back to input can anyone tell me why its reading 24v