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Atom X relay problems


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I’m trying to sort out the relays for my fuel pump and fan.

I’m using aux 3&4.

The relays are wiring positive trigger. 

They test out fine with the relays removed. But then when the relay is installed the it faults on switching high. 

The pin is going to 12v to trigger. The power in is good. The power out is fine and the earth is fine. 

All I can think of is that the pin is seeing a dead short across the relay? 
perhaps I need a signal ground to the relay as well? Instead of just body ground???

Any wisdom is welcome! I’m stumped at the moment


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