On lamp boards, it is also VERY common to have cracked solder joints at the pins that can cause bulb issues. Check these as well on boards where you are having intermittent light issues.
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On lamp boards, it is also VERY common to have cracked solder joints at the pins that can cause bulb issues. Check these as well on boards where you are having intermittent light issues.
Rebuild the connectors before you do anything.
Build a breaker using the bad fuse so you can test without going through fuses.
Then start disconnecting one bulb socket at a time from the strand, and see if the fuse blows. This should help you find the short (assuming it is on the strand and not on the board).
Good luck! I HATE tracing down shorts, as it tends to be slow tedious work for me. But it does feel GREAT to find it and fix it.
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