I am working on wiring my 51 f1. I switched to a 12 volt system with a modern gym type column. I have a 12 headlight switch but the wiring diagram that came with it is a bit confusing. It’s supposed to control lights on and off by pulling out ****. However nothing on the wiring diagram speaks to the headlight wires. It has all sorts of other connections, which I probably won’t use, as most of those go through the new harness fuse box. So not sure which of these posts the lights wires go to. Attached is the headlight switch wiring diagram. Sold by mid fifty.

 

I would use the "R" terminal for the headlights, but also use a relay for the headlights. The pinout is very similar to the OEM switch save for the fuse and rheostat. That has to be a really unique switch, having circuit breakers built in, and being the "fuse block for the entire truck".

 

Thanks. I think the wording was taken from the 6 volt version. But as I have a fuse block with the performance world harness don’t need the function. Just dimmer and headlights. Unless there is a better option available.

 

You weren't specific on "lights wires" so I just assumed you were referring to headlights because they aren't included in the pinout. The wiring for the dimmer switch is the same as the original, and includes the headlights, if you have the schematic. Or maybe I should say - the "dimmer" IS the headlights.

 

Man. Wiring is the most confusing.
so if I understand you The rear lights is the same pin I put headlights on (R). Makes sense when I pull the **** it would turn on the rear taillights and headlights. For what I understand the dimmer is the dash light dimming control. High beams would be controlled through column.

 

I'm probably just making it confusing because I don't know how much stock equipment you're using. The "dimmer" terminal on your switch would normally go to the dimmer foot hi/lo beam switch that controls the headlights. If you have a dimmer switch on a stalk on the steering column then disregard and use a relay for the headlights on the "R" terminal (otherwise that would be a substantial load on the taillight contacts in the switch). The dash light "I" terminal on the switch is for control/dimming of the dash lights with the integral rheostat.
Those instructions were written by someone that doesn't have a full understanding of automotive wiring, ie: "amp gauge". Huh? Technically, no such thing exists in the free world. A meter is an instrument that measures things, in this case it measures amperes - ammeter. A gauge is an instrument for determining or regulating the level, state, dimensions, distance, or capacity. Literary license has given way to colloquialisms. But I digress.

 

Ok thanks for taking the time to help. Me with this.. so after reading your post i did some looking at my stuff.
So seems that my column does not have headlight dimming feature. I will have to rely on the foot switch...
So i will go through how i think it should be wired and you can tell me how wrong i am.

headlight wires high/low from harness go to my floor dimmer switch. Dimmer Has 3 connectors 2 for high low....and 1 that says battery.
I am thinking the battery post goes to the light switch that says dimmer “h”. Then the Light switch Battery Amp “B”. The only thing i am not sure off, unless some of this is wrong, is that my wiring harness Performance World 329021 came with what they call a headlight breaker. Picture attached. No idea what to do with it. There is 12v 30amp stamped on it. But nothing that i can see to plug it in....

 

This is that headlight breaker

 

This breaker can be used in lieu of a fuse in your fuse block. It has the same blade dimensions. You may have to trim the blades if it sticks out too far.

 

The wires from the two headlights go to the foot dimmer switch, not the headlight switch.

 

The kit that you have is intended for a Chevrolet according to Performance World, but "will work on others with modification".

 

Thanks bob. I think I am finally sorted out. Much appreciated

 

Erick1109:

I hope you're doing well. I am working on a 1951 F1 and have the updated(newer 12 volt) switch and nut but it won't mount in the original location in the dash. Did you have any problems mounting the switch to the dash on your truck? Thank you for your help.

 

I hope you're doing well. I am working on a 1951 F1 and have the updated(newer 12 volt) switch and nut but it won't mount in the original location in the dash. Did you have any problems mounting the switch to the dash on your truck? Thank you for your help.