I need to find a fuse panel diagram for 78 chevy 3/4 t truck. Got some wires knocked loose and dont have running lights, HELP???

Check the plug at the fire wall. Corrosion . Most likely hard wire it. Eliminate the plug. Lucky for you, it has no computers on it. You will have to start with power and grounds to the turn signal an fuse panel. Work your way threw it. A wiring schematic wold help, but good luck on finding one for a 78.

Your half way there. All you need is a wiring diagram to trace the wire from the ignition to that fuse. Most likely it is one wire from the ignition, then it splices to the different fuses. In my experience the splice fails(corrosion), Some times you loose one area, some times all. Depends on which side of the splice is corroded the most. Splices are hard to find. Even harness diagrams can be as much as 2 feet off. I usually find the color code of the wire and run a new wire. In your case, it would be from the ignition switch to the fuse panel.

1-8-4-3-6-5-7-2

TDC on #1 compression stroke,not exhaust

Number 1 on the dist cap-- is at about 7 o clock,
as you face the motor from the front

2-4-6-8
1-3-5-7

1&2 are at the front-- as you face it

Get a wiring diagram off a data base at
local repair shop

.78 amps is 780 milli amps

You should only have about 40 milli-amps tops,
when everything is sleeping

Typically that is a fuse on many cars they are fused together, showing the driver that when the dash lights go out there is another problem too I do not have a wiring diagram for that vehicle, look in the owners manuel. In some cars there are 2 or 3 fuse panels. If that did not cure the issue I would take it back to the repair shop that did the work, especially if the damage was in the rear. A loose Ground/bad connection/ broken wire or combination of all 3 could be the problem Source(s): Professional mechanic since 1993

check fuse #1battery hot always fused and #11 especially 11 hot on acc and run on a fuse cant get a diagram to send put 1985 c10 wiring diagram in search couple of them show up that would show this wirings-diagram.com > 1985-chevy-truck-wiring-diagram

CHECK THE CLUSTER ELECTRICAL WIRES.COULD HAVE KNOCK THEM LOOSE WHILE REMOVING THE RADIO.

check the small wire at the starter to make sure that its gettin power when you have the key turned all the way like you were gonna start it. if no power it is probably the ign switch. but i would say that you have a loose wire or broken wire. check all fuses

in your case check all your fuses,if thats not it the motor or the switch might be bad,use a test light on the motor to check if your gettin power