Was adding a hot plug to use a 2 million candlepower spot light on a used boat I bought and found an always hot terminal under the dash and searched around and found a ground bar for the ground wire. I fused my hot wire according to directions, and tested across my new leads at 12+ volts. Installed new hot plug and light and didn't work. After a lot of testing components and frustration, I finally moved ground to a different terminal location under dash and all worked well. So, was wondering if a circuit can test ok, but when put under load not work OK? Or was I likely doing something else wrong( ground bar had fuses which confused me, but still I got 12volts from there to my positive terminal.)?
