" I ran a live taillight feed from the rear of the cluster to the meter and earthed the meter through the wired (white) pin3 on the socket.
It may show as a good earth circuit on a DVM ( eventually back to bat neg ) with no load, the load applied by a DVM is negligible, but when a load is applied, bulb, there may be a poor connection via corrosion etc that won't pass the current required.
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