Epiphone Sheraton wiring problems

[alexander_stcs]

Whats up everybody,

Yesterday i noticed that bridge pickup tone is not working and found the wire got off the pot.I pulled out the pots, soldered the wire back, checked my guitar and now the whole brigde position wasnt working at all.I checked out the whole wiring harness but there was no visible defects.I also checked it with multimeter.Any ideas of what could be wrong??thanks

[darkbluemurder]

I also checked it with multimeter.

What exactly did you measure?

It could be that there is a short in the bridge signal wiring to ground - this would kill all sound from the bridge pickup.

BTW: what do you get in the middle position of the selector - both pickups or only the neck pickup?

Cheers Stephan

[alexander_stcs]

Thanks for the input.In the middle position i get sound only from neck position if the bridge volume not all the way up or all the way down

[darkbluemurder]

That does not sound like a complete short of the bridge pickup signal - in that case the middle position of the switch would be dead, regardless where the bridge volume is. Time for a structured troubleshooting process:

1. Put a guitar cord into the guitar jack. Clip one probe of the multimeter to the free jack's tip, and the other probe to the free jack's ring. Set the meter to DC resistance in the up to 20k range.
2. Turn all the controls up and
a) put the pickup selector to  the neck position - what do you get? You should get 5k - 9k. Slightly higher is still OK but not significantly higher.
b) Put the pickup selector to the bridge position - what do you get? You should get 7k to 12k.
c) Put the pickup selector to the middle position - what do you get? You should get  3k to 6k, because both pickups are in parallel now.

Please do these measurements and post the results. That will be helpful to pinpoint the culprit.

Cheers Stephan

[alexander_stcs]

I did your instructions.Heres the results

In  the neck postion i get 8.5 K

In the middle and bridge i have only 4 Ohm

UPDATE

Ok, looks like ive grounded a bridge wire.Problem solved.Pickups are working.

New proplem - im getting single-coil hum now.Any ideas of how to fix it?