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Author Topic: MB-6 Bass, Mercury Series  (Read 2167 times)

Offline 1bw

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MB-6 Bass, Mercury Series
« on: February 24, 2009, 11:18:16 PM »
I need some help. I'm looking for a wiring diagram for a Washburn
MB-6 active 6-string bass. It has two jazz style pickups, the bridge is a W663 pickup and the neck is a W661 pickup. I'm trying to get rid of a major hum ! It seems to be a ground issue, when I have the 3-way switch to the neck there's hum, when I place the switch to the middle almost no hum, and when I place the switch to the bridge there's hum. The bridge pickup is loud and the neck pickup is soft in volume. The pickups are 3 11/16 long and I have a 3 string spacing at the bridge.The serial # is 9303213 which I found on the backside of the neck, by the tuning keys.
Thanks, 1bw
« Last Edit: February 25, 2009, 10:35:24 PM by 1bw »