No 12 volt constant power to stereo Options

[jcf3202]

I just purchased a 96 Celica ST. The previous owner told me the radio will not retain station presets, I figure no big deal I plan on replacing the stereo anyhow. It turns out I have no constant 12 volt power to the radio (blue wire with yel stripe). I’ve replaced all the fuses, under the dash and under the hood, except the big square 30 and 40amp (figured if they were bad more than just the stereo would be affected). All other electronics on the car operate fine, lights, dash, wipers, cig lighter, etc. I've searched the posts for other areas to check.
Any other ideas, before I assume a broken wire and just run a new wire?

[trdproven]

you can always rerun the wire once youve pinpointed the problem, maybe its even eaten up a bit.