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Reply to "FF Suby Speedster broke down and flat towed."

I think you've got a short between the relay signal + and the relay power +.

I inadvertently wired a fan relay on Bridget this way once and that's what happened: buzz, no fan.

You'd think a 12v+ wire would be fine wherever it comes from but if the switch signal to the relay is somehow wired to the + FROM the relay to the component you get this weird feedback loop.

Trace the wires. Something is somehow shorted in a way that the fuse can't notice.

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