Have a look at my "wiring compendium" ...
Draweing 1.9.11 (page 219 in the current version 387).: http://161589.homepagemodules.de/t29...-E-Baesse.html
Black, Red (and maybe bare) are GND.
White is HOT.
If your bass is wired like the 2008 version, wire it like this ...
So, White to HOT and all others to GND.
Or how are the colours at your bass at the moment / in your original Squier wiring?