Turn signal indicator lights come on with key Options

[GeorgeKopf]

I'm wring my 1973 wiring harness and have a bunch of things installed which seem to be working correctly (i.e. headlights (high & low beam), headlight motors, turn signals, running lights, tail lights)

But (IMG:style_emoticons/default/bootyshake.gif) the turn signal indicators are always on!

I've traced the flow of current from the fuse panel (red with white stripe) to the hazard switch, from there (red) to the relay and from there to the turn signal indicators (blue with white stripe).

47 is the relay
31 is the hazard switch
22 is the turn signal lights
26 is the steering column switch


I have two relays and both seem to work fine. When I pull out the hazard switch the indicators and lights all blink. When I set the turn signal that side blinks.

I have two hazard switches and both behave the same way. As soon as I connect the red and red/white wires the turn signal indicators come on.
With the knob pushed in, I have continuity between the red/white (power in) and the red (power out to the relay).
With the knob pulled out, I have continuity between the black/red (power in) and the red (power out to the relay). (IMG:style_emoticons/default/confused24.gif)

More information:
I have cleaned all grounding studs.
I disassembled one of the relays and cleaned it.
If I disconnect all of the wires from the hazard switch except for the red/white and the red, the signal indicators come on and stay on. Doesn't this mean that my relay is bad? It should be getting power so that it can feed the turn signal indicators when the turn signals are set.

It seems that the relay is allowing the input power to the blue/white wires when it shouldn't.

If so, is there a good way to test or repair them?

Thanks in advance for any advice.

George

[GeorgeKopf]

@Superhawk996

I was thinking how I might bench test the relays. Do you know which connector on the unit represents which wire on the diagram?

Also, both relays are probably 50 years old. Do they naturally go bad over time?

Thanks.

George

[Superhawk996]

Do you know which connector on the unit represents which wire on the diagram?

Also, both relays are probably 50 years old. Do they naturally go bad over time?

Germans are very good about putting terminal numbers on parts; either on housing or molded in by the terminals themselves

Relays are pretty robust devices - would be somewhat unusual to have two that are failed the same way but technically not impossible.

If your theory were true you could measure relay terminals with DMM and see if you have continuity between terminals “49” and “k” per schematic in post 3
Terminal k that is on schematic may show up on flasher relay as “c”

Likewise - follow Spoke’s advice as quick method as another valid way to help troubleshoot if the problem is coming from
The flasher relay.