sunk my 91, nothing when i turn the key

my friend has a 1991 Jeep XJ Limited, it has the 4.0, unsure on the tranny. me and some friends talked him into crossing a deep part of the creek, and needless to say he hit it way to fast and water ended up in the floor boards. After we pulled it out we unbolted the exhaust and drained it, drained water out of the intake, checked the oil and there was no water in it. it turned over several times but never started, now when you turn the key nothing happens, battery is brand new. need some help

Pull the spark plugs and let them dry.

ALSO you are VERY lucky that you didn't hydraulically lock up the the engine.

we tried that, even hit them with a wire brush. the problem is that the interior lights dont come on, the gauges dont move, absolutley nothing reacts to the switch being turned on

other than fuseable links I would check to see that you are getting power to the ECM, if so check some of the outputs like the grounds that are passed for the Fuel pump. If the outputs aren't working then you may end up having to change out the computer.

check grounds and electrical connections first. in this case a wiring schematic and a test light are your friend.

thanks, we got the lights and everything to come on when we turn the key now. now the only problem is when you turn the key off and take it out, the lights never cut back off until the battery dies. what could cause this? messed up relay?