i recently purchased a OBL 450-L (and extremely excited to finally play it). after installing it in my Godin it sounded fantastic! one of the best pickups i have. it worked for a bit, then i put it down for a bit then decided to play it again. all the sound and tone was gone, it was extremely quiet. today i tapped each rail to check, the north rail works but very quiet, the south rail has no sound whatsoever.

any ideas? lol

similar to this except it has a matte black plastic cover
sounds like you have a bad connection.

check each connection that you made. look to make sure it is shiny and that it can withstand a light tug. pickups, especially new ones, don't break- they get installed incorrectly or have connections go. seeing as you played it once already, its most likely a connection somewhere.
I wired it straight to the jack. And the one coil doesn't work. When I put it back in the guitar it worked it gives a reading around 12k. When I plugged it in it worked, but while I was playing the tone and volume dropped. And gives me a reading of 500k so my guess is a short in the coil.