Question: I have a Magna that has working fine for several years and now keeps popping fuses when powered on. The voltage is verified to be correct. What could be causing this?

Answer: Open the faceplate and check the connection of the green molex connector where the power goes in. In rare instances, it can loosen just enough and pop a breaker.

Also, the Magna 3 I&O states that stranded, not hard wire be used to connect the power. When hard wire is used, it can slightly pull our or loosen the connection when the face plate is secured.