yeah, there could also be a smaller amperage rating fuse in a spot where there should be a bigger fuse.

ie: radio fuse has a 20A fuse, when a 30A fuse should be there.

check that.


keep an eye out for the obvious as well. Like a frayed ground wire, or a frayed power wire to the radio or something. Anything that looks like shit is probably the cause.

2 wires help together by only electrical tape, is probably whats fucking up.