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1978 F150 300CID in line 6 4WD
Folks
Can anyone help me with finding the color of and the wires going to the back up lite "reverse" ??? I am doing the wiring harness on my build and am not sure which wire it is and where it origionates.
Thanks
Randy
If it is the 435, the switch is located on the transmission housing underneath the tunnel cover. I don't know it's color of hand, I'll try to check tomorrow.
Standard or auto trans? If you have an auto trans the safety neutral switch is on the top side of the steering column (under the dash) and that is also the place to locate the reverse light wiring. If is is a standard trans, it is located on the side of the trans and there is a plug under the hood.
Wording from a fellow FTE member."When the trucks came with a manual trans, there was a dummy plug used to bypass the NSS switch. I've never been able to come up with a part number for the dummy plug. To bypass the automatic set up: Unplug the switch and discard or ignore. There are four wires in the harness plug, two each, red w/ blue trace and black w/ red trace. Run a jumper between the red/blue and red/blue, do the same for the black/red. That completely bypasses the NSS switch. Your truck will now start and the back-up lights will be permanently on. Now on to the backup lights.
In the engine compartment is a little U shaped jumper wire. It'll be located on the drivers side splash pan, just in front of the firewall where the wiring harness comes through. Unplug the little jumper, this will shut off the back up lights. There should be a back up light switch on the trans cover. Run two wires from the switch to the two wires that were jumped. This will get your back up lights working again.
Just a note, you could make a jumper plug out of the NSS. Cut the switch off the harness and splice the two pairs of wires. I just hate to cut these switches up. New, they're getting pricey. Here's the little jumper in the engine compartment. EDIT: If you don't care about the back up lights, just jumper the red w/ blue trace wires. This will by pass the NSS but the back up lights won't work."
4 speed on the floor I know the location of the switch. I don't know how the wire is routed or the colors of the wire I think it may be red /blk but I'm not sure
Thanks
I think I understand. it now. I have to look later today. My truck is at the local garage of my friend and we are trying to get it squared away so I can run it rather that come along it everywhere. LOL
Thanks
Randy
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