Locating Electronic Flasher?

I am installing a heavy duty flasher in my '96 Rodeo since my trailer lights are blinking dimly. However, I cannot seem to find the place to install the replacement. Any suggestions? The large fuse box under the hood seems to have everything but a flasher.

My Chilton manual says the turn signal and hazard flashers are located under the instrument panel next to the steering column or in the fuse box.

Dale