So I'm in the middle of hooking up my tail / break / turn signal lights. Kit from mid fifty. Front is already completed. Tail lights are working, Brake Lights are working. Turn on the Blinkers and both rear lights blink.

I'm using a pressure brake light switch mounted on the MC. Power to the brake light switch is coming from the Brake light switch power from the harness, then other leg is running to the brake lights.

Did some testing and this is what I've figured out thus far, if I remove the brake light power wire from the tail lights everything works, blinkers left / Right and park lamps. If I re-introduce the brake light power wire, I have brake lights, park lamps but my blinkers either left or right position on the column blink both lights, (only rear)

I also tested individual blinker wire (left / right) with a test light and when unhooked from tail lights, I get a blinking test light. I tested right and it works, while the right was still engaged, I tested left and no blink so that tells me that when these are connected, something is either grounding out the connection or something, can't figure this out.

Has anyone used the easy wiring and had any issues?

 

What t/s switch are you using ('56, clamp on or gm).

 

Hey DGM,
We had a lot of trouble with our turn signal installation producing weird results. If you are attempting to use LED lights anywhere in your
set up it will cause issues for you because they use so little power.

Ben in Austin
1950 F1

 

After taking a break, it hit me what the problem is. Since my harness only has one power wire for the brakes, I ran the power line to the brake switch, and then from there I ran the other leg to the left brake light, then I jumped that over to the right brake light. The problem is when I turn on the blinkers, either side, that power is lighting both lights. I looked and it looks like Mid-Fifty's has a tail light harness that I think alleviates this issue. I'm going to call them and make sure.

The brake light switch should have had two outputs instead of just one. that would have fixed this for sure. Not sure if they make a one in and two out switch.


Also to answer the other question, I'm running the screw in type pressure switch that mounts to the side of the MC, probably GM style.

thanks for everyone's response.

 

I think it more has to do with the flasher requiring a standard bulb, where a diode will not work.

 

The brake light power wire runs into the brake light switch, then the other leg runs from the brake light switch to the turn signal switch. The wires for each brake light come from the turn signal switch, individually.

This way the turn signal switch cuts off each brake light while it is using that filament of the bulb for a turn signal, but allows the other to operate as a brake light.

If you are using the original style turn signal switch, the wire colors should be as follows:

Red: From the brake light switch
Blue: from the flasher unit
Yellow: to the left rear signal light
Green/white: to the left front signal light
Green: to the right rear signal light
White/Blue: to the right front signal light

The front signal lights are separate, because they are not effected by the brake light switch.

 

Thanks EffieTrucker, that makes sense, it seems like I remember seeing another wire that said brake light switch coming from the Harness.

Thanks again, I will check that out today.

 

I think Effie has it right. I had issues with mine as it's not an intuitive situation. I finally sorted it out, but I can't remember what the solution was. It seems like the issue was taken care of at the steering column harness.

 

there is some logic to it. if you were using aftermarket separate directionals, the brake lights are wired directly to the brake light filament and the directionals are wired directly to the directional lights. IF you are using one filament for both the brakes and the directionals, the output side of the brake switch feeds through the directional system. the brakes lights normally until you turn a directional on, when the directional is on the flasher alternates the light to give you the blinker on that side.

 

Here is what I figured out, the EZ Wiring book does not talk much about the brake lights, only the wiring on the column (GM) talking about the brake light switch. So when I was cleaning up the unused wires I removed the wire call brake switch which connects to the column. I had initially asked my self, shouldn't something plug in there - LOL.

So the way this works is the Brake Switch Power wire goes to the brake switch, the other leg as EffieTrucker stated goes to the white wire on the column.

When you step on the brake, the power goes through the blinker circuit which powers the bulb, no brake light wires go to the tail lights.

I kept the brake switch wire so just need to rerun back through the loom.

thanks everyone for the help.

 

Everything is working great now after wiring it correctly, thanks everyone for the posts and info.

 

Fantastic. I've used EZwire once and was happy with it. I plan to use it on my current truck project.

Glad it worked out for you.