Brake and tail light issue

[bostru]

Have a tail light problem on my 1960 GMC step side . I have power to the headlight switch but no tail or brake lights .The headlights work as they should . If I jump the red power in wire on the headlight switch to the black tail light wire the tail lights work . If the light switch is turned on or if I run a hot wire to the brake light switch the brake lights work. I have replaced the headlight switch but no difference . Can't figure this one out.

Thank for any help

[jmfurgason]

Check all ground wires first. Relace flasher? I had similar issue grond to the headlights was loose and the flasher replaced, all good now. Good luck hope this helps. LouieLouie

[AZKen]

The orange wire supplies voltage to those circuits..so the orange wire is broken somewhere or it's fuse is blown. Check for voltage at orange wire terminal on H/L sw. Check voltage, in and out, of tail/stop/dome fuse. Your dome light is probably not working either. Hot RED comes to that fuse, thru fuse and out to Hot ORN. Hot ORN branches to dimmer and to H/L sw where it energizes BLK at switch "on" mode.

[bostru]

Thanks, will check orange wire tomorrow and yes dome light does not work either

[bostru]

Appears to be in the orange wire at the fuse box ,by moving the wire I get intermittent power to the light switch . Thanks for pointing me in the right direction AZ Ken.