I just installed a boss ripper 496 amp to an alpine cda-9847. Before I wired everything throught the truck, i just hooked it up to make sure my wiring was correct, and it worked. So i had to remove the courtesy fuse so i could unhook the power from the amp to wire it through the truck. I got it all wired up hooked it up turned it on and only the 2 speakers that i have hooked up to the amp work, which is the rear. The two speakers on the front dont work, but i took one out and wired it to the rear and it works. What is wrong?? Thanks
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