12v electronic regulator

[Roger J]

Yes, as Dave says, the ammeter must be connected the wrong way around and, assuming the ammeter is pinned against the endstop, there is a short..Do not turn on again before finding the short or some wiring may burn out..Check very carefully where the armoured wire goes as the shielding may be resting against something or one of the ends may not have been trimmed back far enough - and preferably taped near the connected ends..Roger