1987 Chevy Truck ive got no power

Ok my starter was bad, when you turned the key you could hear the solenoid engage and that was it. I went to pull the starter out and forgot to unhook the battery so the was an arc across the terminals when I put the wrench on it. Made me feel like an airhead and I unhooked the battery. Got the new starter, put it in, and hooked the terminals back up. Now I have no power to anything with the key in any position just no power at all. I hooked a 50 amp battery booster up to the battery terminals and still nothing. Could I have blown some relay or something electrical when I touched it with the wrench? Could I have damaged one of the wires to the starter, and if I did would that cut all power to the truck? I checked the battery terminals and cleaned them with a wire brush and tried to look at the wires to the starter and couldnt see anything that looked wrong. If it was a bad connection at the battery wouldnt it give power to the truck when I put the battery booster on the battery cables?