Well I have an Ibanez EX series bass that I picked up a few years ago. The owner said that he replaced the neck (p-style) with active emg's. He had left the original passive bridge pup (jazz style) in it. Well when I played with it for awhile and quickly noticed the the input jack was shot. Well I didnt know how to solder at the time so I took it to a freinds and he got it in. We also noticed that the last person while knowing how to wire it looked like couldnt solder so he redid most of the connections. How the bass is curently wired is one volume pot and one tone pot. The last pot on the right only has the bridge ground going to it its not hooked up to anything else. Now I get some signal from the passive one if I remove the battery but its not happy about it and very low power. I want to be able to blend the two together but Im not getting enough from the bridge pup. (Im also not certain if its totally functional. It only has volume without the batt across all the strings if the tone knobs in certain places or it only has volume on two strings, or this could be the pot) Is there a way to use both pickups? If not whats the best way to switch between them if the battery goes dead. Now I also question the legitimency of these pickups. From what I found online all new emg's have detachable wireing. After a little more digging I found the old ones are hardwired but have seriel numbers and other marking on the back but these dont. Considereing the hack job on the wireing and the fact that there is no preamp in the body I am not confident that these are the real deal. One more thing, I also have a squire p bass. Would it work to swap around the pups in these guitars, makeing the p bass active and the Ibanez all passive with a v/b/t knob configuration? Holy cow long post sorry.