Electrical Question (Rule Pump Cartridge)

[plusone876]

I have been without a freshwater wash down for a while (old rule pump cartridge crapped out a few years ago) and just recently purchased a new cartridge. Put the new cartridge in connected the wires via heat shrink connections and nada. Disconnected and checked the wires running from the power and they checked out. I figured that the pump cartridge was bad and sent it back. Once I received the new pump cartridge, I hooked up up, and nada. I direct connected the pump cartridge to the battery and the pump is fine. I'm no electrical expert so can anyone provide suggestions to try? Thanks beforehand.