Brake light help

[DaddySniper75]

I ran a wire from my battery to my reverse switch (manual Transmission ), From the switch to the reverse light. I have juice in the ran wire, but it doesn't light up. I thought a ground issue.... So I ran an additional wire from the tail light screw, to the tub. Still doesn't work. The bulb is good, when I hook it to the turn signal wire, it lights up (i think it may be grounding at the turn switch). Any idea to make it work?

 

[mriplaybass]

Disconnect the wires and check continuity across the terminals of the switch. In reverse you should have continuity, any other position the switch should be open. Or you can keep the hot wire hooked up to the switch and put it in reverse, then check the other terminal to see if it is hot. I would not recommend running the hot wire directly from the battery to the switch. If there is a short, you could end up with a fire because there is no fuse. Plus, if you park the Jeep and leave it in reverse, your back up lights will stay on and over time kill the battery.

 

[Lumpy Grits]

Do your turn sigs work? The brake light is routed via the turn sig switch.
LG

 

[DaddySniper75]

Tracking all. I had it hooked up initially to the battery to ensure this was going to work before I hard wired it in to the fuse panel. The switch appears to be good to go. I have juice all the way to the reverse light. When I hook it to the reverse light, it doesn't work. I checked the bulb, and added a secondary ground. Still no luck.

 

[mriplaybass]

Are these all new wires going all the way back to your back up lights? Where is your secondary ground? On these old Jeeps, about the only good ground is one that comes directly from the battery, not the frame. You may want to install several grounding bars on the vehicle that are tapped directly to the battery thereby eliminating the frame grounding problems.

Try checking the bulb socket with a multi meter. If you are using existing wiring back to the socket, you will possibly show 12.x volts at the socket with the multi meter, but when you apply a load by installing the bulb, the old wiring is inadequate to carry the load, and the bulb won't light.

 

[DaddySniper75]

Disconnect the wires and check continuity across the terminals of the switch. In reverse you should have continuity, any other position the switch should be open. Or you can keep the hot wire hooked up to the switch and put it in reverse, then check the other terminal to see if it is hot. I would not recommend running the hot wire directly from the battery to the switch. If there is a short, you could end up with a fire because there is no fuse. Plus, if you park the Jeep and leave it in reverse, your back up lights will stay on and over time kill the battery.

The switch is good. When in reverse, I get juice to the back wire. Any other gear, there is no juice.

 

[DaddySniper75]

Do your turn sigs work? The brake light is routed via the turn sig switch.
LG

Turn Signals work. The left one will stop flashing when I hit the brake and resume when I let off. The right one works as expected.