Topic: small electrical prob, experts help pinpoint!!!

[funkja]

driving along and i lose all 4 side markers, turn signals and horn.  turn off and back on, horn beeps once then lose all again.

got it home and checked whats up:

Front side markers/signals: working
Rear side markers/signals: not working & flash like hazards when turn signal activated(either direction)
Horn: working

I have brake light and headlight, stock electrical harness.

anyone pinpoint the issue from this? 

1980 CB750 Custom DOHC

[HavocTurbo]

sounds like a short somewhere....

Does it go out when you go over bumps?

how long are they out?

[333]

It sounds like the ground wires for the left and right rear lights are connected together, but not connected to ground.  And if the lights are amber, they are not marker lights.

[burmashave]

Dunno, but I don't think I'd have a good shot of troubleshooting that without an electrical diagram. Because it's a DOHC, I can't point you to where you might find one. They are prolly available online somewhere. On the other hand, there's lots of good general troubleshooting info in the Electrics section of the FAQ.