HELP!!! terrible hum in my Fender MIM RH Signature :(

Have you gradually been favouring one pickup over the other? The jazz bass is quietest with both pickups at the same volume, as this is where the hum cancelling properties are strongest. Having one turned all the way up and the other all the way down will produce the most hum.

 

Never mind. Just realized the RH jazz bass has a precision split coil pickup as well as the single coil at the bridge.

 

Actually the jazz pickup in this bass is hum canceling too, it is a dual coil. My RH does pick up some humming noise which goes away when I touch the strings when I play it at church. I don't get anything at home. It is not a real loud hum and sometimes it isn't there at all, hasn't been the last two Sundays. If I turn the volume down it also goes away. My theory, which I have not put to the test, is that it needs better shielding. All my other basses, some active, some passive, have the same hum at church, btw so it isn't peculiar to this bass or active Fender basses. If you feel like wasting some aluminum foil try wrapping the bass body in foil and see if the hum goes away. Be sure it makes contact with the strings and bridge. If that kills the hum then a better shield job might be in order.

 

check your output jack,.. ours failed and was replaced. maybe check your battery volts.

 

The fact the hum goes away when you touch metal indicates the ground is fine, you are getting RF interference.

Give your bass a proper shielding job and the hum will stop.

 

Ignore your "foil test" and trust me. I am telling you with 100% certainty that a proper shielding job will completely resolve your issue.

 

It is unlikely that you can do a better job of shielding than you can by wrapping a bass in aluminum foil. The only flaw of a foil wrapped bass is that it is impractical to play it. Was the foil grounded to the metal housing of the amp cord plug?