So I’m having an issue and I can’t track it down. I have replaced the NSS, Brake Light switch and I have LEDs. I have head lights and I have tailights. My blinkers work as well. But I do not have Brake lights or reverse lights. Any idea what Im missing??

 

Do you have current passing through the new brake light switch?

 

I would first start at the light housing making sure I have good connections and grounds. Use a volt meter or test light to see if your getting power back there.

Auto or man trans? On a auto the reverse light switch is on the column under the dash.

May want to give us a little more info as to what year and model since they are not all the same.

 

I will check. Did not think to

 

Sorry. It’s a 1968. 360 fe

 

Sorry it’s ‘68. C6 auto. 360fe

 

Since you have blinkers, I would say it is something to do with power. I am not sure if both the Brake Lights and Back-up Lights get power from the same circuit. Since you have blinkers, its not your lights or housings.

 

Ok I thought the same. My question now is where should I start?

 

So, my blinkers are good. My housing is good. My connections is the question.. Where should start the process? Im still confused lo

 

Did you check the fuse? It's separate from the other lights.

It could also be the brake light switch. It's under the dash. When the pedal is up, it breaks the circuit by opening the switch. You should have power to one side of the brake light switch with the pedal up, and on both sides with the pedal down.

 

Brake light switch is brand new. Didn’t know it was a different fuse. Is there a fuse diagram out there somewhere??

 

Put the old fashioned 1157's back in and see what happens.

 

Here is the diagram for the fuse box:

 

Use a test light and see if your getting power at the light socket. These old sockets have problems from time to time, corrosion. If no power there are several connectors alone the way to get there. There should be at least connectors at the back and 1 in the engine compartment that sends it to rear. Like I said earlier the BU lights switch is attached to the column, so see if you have power there.

Here is where you will find how the wiring is routed and schematics. https://www.fordification.com/tech/schematics_h.htm

 

What blue said. And check for power in other places as well.
Are you certain that when the blinkers are flashing, it's the bright filament and not the dim filament that is lighting up?
If it's the correct bright filament for the turn signals, then your wires are good at least from AFTER the turn signal switch.
The stop, turn and emergency flasher circuits all use the same wire from the steering column back to the lamp sockets. But you still have to find out where the power is stopping.

You should have a multi-meter to test for voltage, or at least a test lamp.
If you don't currently have either, you can test the brake switch circuits/wires by disconnecting them from the brake switch, and jumpering them both together. Put a piece of wire, or a metal bit of some kind, into the two contacts.
If there is power, and the wires and turn signal switch are good, you should see your brake lights come on.
But to really know if it's working, you really need to be able to see 12v on one of the wires at the switch.

And 52Merc mentioned, LED's cause all sorts of issues. Try regular bulbs again just to see if the problem goes away. If it is the correct filament however, then the LED's are probably not the issue.
And as you may know, a "new" part does not mean it's a good working part. Electrical stuff especially! So don't ignore your brake switch, or anything else just because it's new. They're the cause of problems more often than they are not. Unfortunately.

Good luck.

Paul