Hi, Recently bought a 1989 Toyota pickup. The fuel gauge does not work. Well it's up in the air, their is no wires connected to the sending unit at all! So popped hood can't find wires coming out of fire wall! However did find wiring diagram in manual. But not technical enough to figure out! Lol! Thought I could get behind fuel gauge and run new wires? Need best way to take dash apart to get to wires. Thanks.