Did the car work properly before you relocated the battery? If you're trying to troubleshoot the swap wiring at the same time as the battery, you're not doing yourself any favors. I still think it's most likely not the battery relocation. You could still be missing a ground under the hood though. Looking at the relocation threads on some other forums, there doesn't sound like there is anything other than the battery negative on that one cable, so you've likely got a problem somewhere else.