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Have some damage to the wiring behind the dash, anyone know where the orange wire connects and the light green wire with yellow stripe? Also, was thinking the black wires were grounds, but found some are hot. This is a '75 f-600.
Where exactly are the green and the yellow wires located?
I don’t have wiring diagrams in front of me, but I thought that might help somebody determine where they might go.
Obviously, the colors are the key, but offhand orange sounds like one that I’ve seen on the headlight switch, and the green with yellow sounds like something for the horn.
But I know there are at least a couple of different green with various striped wires doing different functions.
The most common orange wire is the field wire to the alternator, but that’s under the hood and would not be found under the dash.
Oh, and another thing about these trucks… Some wires are just unused. Usually due to them being part of an option that your truck doesn’t have, but were included in the harness to save money.
Both of these wires are just a few inches left of the instrument cluster.Both come off the wiring harness, would like to figure out where to attach them. My fuel gauge does not work, and it has orange wires on the back. Assume it attaches there somewhere.
Yes, I forgot that orange was also the color of the fuel sender wire. Do you have one tank, or two? Sometimes there is a connector because Ford may have wanted to use the same harness for both single tank and dual tank trucks.
with Broncos, it was right by the dash switch. But in pickups, the dash switch was typically way over to the right by the heater controls. So it doesn’t sound like that’s the situation here.
Thanks Rich. Totally ignored the fact that this was an F600 and therefore might have some (many) differences. I read it, but it did not register on the brain.
I don't know about the F600, but on the 73-79 F350 and lower, orange is the wire from the fuel sending unit to the gas gauge (might explain why that doesn't work). The green/yellow stripe is usually connected to the dome light. Therefore, it connects to the headlight switch, both door switches and goes up the A-pillar to the dome light.
Thanks for that bit of info Citymorg, this morning went to see what I could figure out on the truck, and found where the orange wire goes up the rear post from the fuel tank, so took out the head liner cardboard and found the orange wire was damaged over the top of the door opening. It was gone where it attached to the wire end left of the cluster. Also found the bad black wire that goes to the 5 lights on top of the cab. Fished in 2 new wires, used solder and heat shrink tubing for the repairs, and the fuel gauge now works. Thinking about fishing a new wire up the post for the dome light. Appears the wiring is the same for the F-600 as the smaller trucks.
Have some damage to the wiring behind the dash, anyone know where the orange wire connects and the light green wire with yellow stripe? Also, was thinking the black wires were grounds, but found some are hot. This is a '75 f-600.
I highly recommend buying the correct Haynes book for that vehicle. The wiring diagrams are at the back of the book. I utilize my book all the time especially for the wiring. It can be purchased online or at your local automotive supply store.
X2 Hayes or Chilton are pretty good basic manuals.
Some dome light talk from a couple of FTE members."For the domelightwire, hot-at-all-times power comes goes to the headlight switch as a GREEN with YELLOW stripe wire. Domelightpower comes back out as a BLACK with BLUE stripe wire. The same color scheme is used at the door jamb switches. BLACK with BLUE stripe runs out to the actual domelight. BLUE with a RED stripe is instrument panel illumination. It comes out of the headlight switch to the fuse box, leaves the fuse box again as the same color and is distributed throughout the dash.
There is no ground connection to the domelightswitches or the headlight switches. These switches switch power, not ground."
And......
1) Make sure you have 12 volts on both sides of the courtesy lamp fuse. This circuit is hot at all times, so it doesn't make a difference what position the key is in. If you have power on only one side, replace the fuse. If you don't have power on either side, then there is other work to do first.
2) Pull the domelightswitches out and remove them. Make sure the terminal for the GREEN with YELLOW stripe wire in the connector has power.
3) Check the domelightswitches for continuity. With the plunger all the way out (switch CLOSED), the switch should be shorted. With the plunger pushed all the way in (switch OPEN), the switch should be open. If not, replace the switch.
4) With power to the switch proven to be good, and the switches proven to be good, the domelightshould lightup. If the domelightdoes not lightup, remove the cover and check for power at the domelight(not the side that's permanently grounded to sheetmetal) with the door OPEN. If you have power here, yet the bulb does not lightup, replace the bulb.
(5) This will prove out the door-side; if you get to the point that the doors turn the lighton but the headlight switch will not, might be new headlight switch time.
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