Need Help Guys....

Hi all... and thanks for the help ahead of time.

I am trying to take the pick ups from my dead PRS (neck snapped off... long story, don't ask) that had a custom switching system put into it and drop it into my Epi LP.

Now I dunno much about guitar electronics... but soldering is no big deal. I just drew out a chart to tell me where wires go and what to "un" solder and "re" solder to put it back together..

The pickups are PRS Vintage Bass and HFS. One Volume. One Tone. A 3 way selector. Each volume and tone knob is also a Coil tap so that there is individual control of the coil tapping.

I've got it switched over.. but there is a hiccup that makes no sense to me. The Coil taps are working fine.... and both pickups are working...BUT the neck pick up controls work in the OPPOSITE direction... ie I have to turn the volume and the tone in the counter clockwise instead of clockwise to increase volume and brighten the tone.... and when the pick up selector is in the middle position... its seems that the volume becomes more of a "blend" than a volume... I am stumped... it all looks right... what do you guys think

sorry so long.

Off the top of my head, the PRS cavity which originally housed the electronics is probably shielded with electrically conductive paint. Meaning, it was the equivalent of one huge, ground wire. So, chances are that none of these components now in your Epiphone cavity are grounded and that's why you're getting all these wacky symptoms. You should either run a ground wire across ALL the components or remove them, line the cavity with foil and then, reinstall them.

great suggestion... but I did the foil before switching the pickups...

but you may be on to something... could a grounding issue cause this?

Yes. Also, check to see that the capacitor is resoldered correctly.

My professional background is auto & airplane repair. Makes me check ground before I do anything. Especially when it's something that don't make sense like this. Double ground if you have to.

cool... I'll redu all the the ground wires and see what I come up with.

Also, check that the wires on your vol and tone pots are to the correct lugs. I screwed up in one of my builds and wired it backwards, getting the same issue as you, with the tone and vol rotation all screwed up. I thought it was cool so I left it.

Dolan

Hi all... and thanks for all the help.

Finally got to get back to fixing this....

I did resolder the grounds... and DID double ground (thanks Customtele) and its working quite well.... THANK YOU to all of you.

I'm still new to the "modding" world... but am really having fun with this. I just put the Bitmo Trio mod into my Valve JR and was surprised how easy it was and how much better it sounds....I see a WHOLE lot of projects coming in my future.....

Another one bitten by the DIY bug. It's contagious as hell around here. Good work!

Once you hack, there's no turning back.

Welcome to the dark side.