'59 Tail Light wiring harness repo

[SCHRUMGMC]

Bought a brand new Tail light housing for the '59
How do I wire it to the brake light switch? it doesn't want to reach?
What exactly does it snap on to?

I hooked it to the back of the housing, and some reason the wiring doesn't want to reach the brake-light switch, and it has these slip ons?


The reproduction Dome light has two slip on type prongs...
What do they slip on to? Can someone post a photo

[OrrieG]

Tail light to brake switch, all I can think of is that the harness is for a driver side light and you are trying to stretch it to the passenger too? Passenger side light was an option. One brown wire from the brake lights goes to the switch on the bottom firewall under the pedal, other orange wire from the switch goes to the light switch.

I questioned the dome light you photographed and posted and NOT being like the standard Chevy two wire configuration. Like I said in that post it sounds like the GMC only has one wire with ground to the body, not ground going back to the headlight switch. The black wire should go from the switch to the light to provide power. In your case the white is not needed IF the lamp is grounded to the housing, you can check that with multimeter (ohm function center prong in socket should show closed when other lead touchs the housing). Try that and see if it works, if it does tape the loose white wire to black in case you decide to change to a chevy type dome light later.

[SCHRUMGMC]

I mean, I tried stretching it without anything it and it only made it halfway

The Dome light wiring(Black wire) has a prong end that would slide over a prong but this one has something like the Temp sending unit connection? I'm confused with it

more worried about the tail light wiring now

[47 Fasttoys]

Just a thought here, maybe what you bought is a tail light to tail light harness and you need an additional harness from the tail light harness to the cab. I,m not up to speed on the TF so I maybe way off base here.
Rob

[OrrieG]

Fasttoys beat me to it, I thought you were talking about a new harness from the cab back to the gas tank, brake and tail lights. If you just got a new taillight assembly the factory wiring diagram show it connects to the front harness near the gas tank, probably inside the frame rail (see red circled area in attached diagram). Mine was hosed up when I got it in 1976 and one of the first things I changed out to new wiring.

[SCHRUMGMC]

But it has a connector to a prong type? I don't even see that on the truck

Thanks for the info

[OrrieG]

here are the stock type. they are available at good electrical parts stores or here http://www.repairconnector.com/

If they are MIA someone has probably replaced the back harness. Nice to have for when you need to remove the bed.

[SCHRUMGMC]

Where are those located? on the truck

[OrrieG]

somewhere in the harness between the stop light switch and back, inside the driver side frame rail, IF you have the original harness. Over 50 years it may have been replaced, they get real brittle and start shorting out.