my 2003 honda accord have no power but my alternator is good. what could be the problem?

By "no power" do you mean no lights, ignition, starter etc or the system is not charging? Need more info to help.

nothing coming on n yes no light no nothing. help me please

You may have a blown fuse in your electrical wiring to the alternator, probably near the battery.

Look for a fuse wire off the positive pole of the battery. It looks like an ordinary wire but it is actually a fuse. You can by-pass it with a regular wire (12-14ga) long enough to check it. If power comes on with jumper then buy a new battery cable. DO NOT KEEP JUMPER ON. Keep me posted please.

There will not be a fusible link to the battery, but rather a maxi fuse near the battery. Honda stopped using fusible links in the mid 90's..

Didn't realize that. My last Honda was a 92. Glad you corrected me.

I'm having the same problem with my 2004 Honda Accord no power when I turn my key

It's the main fuse in the box

Had to put a relay wire from alternator to battery positive side is that the positive wire that's bad or could it be a fuse

I was driving & my e-break ,abs & battery light came on changed the alternator replaced n now no power no lights come on car dead what could it be need help