I recently switched out a 250k volume pot on a strat. The problem is that the customer has voiced a complaint that since he got the guitar back he has noticed that he gets very little volume from both the low E and D strings on the neck and middle pickups ONLY. The bridge pickup is a JB jr. and that picks up the signal and sounds terrific through an amp. Acoustically the guitar sounds just fine which is what makes me think that the problem lies somewhere within the electronics.
This guitar has two tone knobs and only the one master volume knob. I am far from an electronics expert but have a basic understanding. That being said, is it possible that somewhere there is a bad ground connection that is causing these two strings to find their way to earth faster than finding the output jack? I was under the impression that treble, not bass, generally "bleeds" off first.
I see some suspicion in the fact that the two problem pickups are the only ones that have tone controls, but I am also hesitant to find a problem in the tone controls due to the fact that only two strings seem to have volume issues.
The guy is bringing the guitar back tomorrow and my plan of attack is to check all connections visually and then with a meter.
Any advice regarding this issue would be very much appreciated!