Ok so this might be long, but I've got a 94 dlx 4x4 with 3.0. it ran perfect and all the lights and guages worked, then me and the wife went fishing, and I was gonna let her pull the boat up the ramp, but long story short, she let it go into the water, luckily the motor wasn't running, only the key was turned on, it sat underwater about 20 hours before I could get it out. I brought it home and stripped everything down, flushed the water out of everything and replaced all the fluids, then I replaced the ECU, all the relays, the afm sensor, plugs, wires, distributor cap, ignition coil, and igniter. So I got it back running, and it runs really good, but my oil pressure gauge and my alternator guage won't work, the temperature guage, and the fuel gauge works, and also the dash lights won't come on. The headlights work and the guage showing the lights are on bright work, also the tail lights, and the blinker lights work, and the lights for the a/c and heater controls work. I've checked all fuses and everything is good, under the dash and under the hood, also the two fuses on the passenger side are good, does anyone have any idea what I should check to see why those two guages and the backlights aren't working? I've looked at all kinds of diagrams and am at a loss, also the potentiometer for the dimmer lights is working because it will dim down the lights on the a/c and heater controls

 

Also I'm pretty sure that the oil pump is working because I pulled the oil fill cap off with it running, and I can see oil spraying all around in the valve cover, and I'm pretty sure the alternator is working because I've ran it enough and had the lights on enough, that if it wasn't, the battery would have drained a lot. I figure it's possible that maybe the dash backlight bulbs are blown, but that doesn't explain why those two guages aren't working and everything else is

 

One other thing I forgot to mention, the tachometer is also not working, it'll barely move when you rev the engine up, but it sits down below 0 on the guage