Uh well...you could always take off the headlight housing and look for the wire there. That'd be a good place to start...and you should be able to tap a wire there. There are a couple holes in the firewall...one big teardrop shaped one for the clutch(if ATX)...one big one on the far driver side close to the fender...and I believe there is one under the wiper cowl that may lead to the last one I mentioned. Then again, this is on a 98+ so yours may be a little different.
