2002 Honda accord ex put battery in the wrong way car won't get power
If you hooked the battery up backwards you may have damaged fuses or relays. especially the ones to the computer. check them all. test the relays, there are good youtube videos on how to do it.
I agree with Mark, in the main fuse block in the engine compartment there are larger fuses and in some cars fusible links, right where the Positive battery cable enters or bolts into the fuse box. Sounds like you blew one.
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