Drivers SIGNAL not working

[Kern Dog]

I wondered about that very thing.
My 72 Duster has seasoned wiring and a 10 year old battery. It starts the car as long as I don't have to crank it very long. While testing for turn signals and brake lights, I noticed that I'm not getting turn signals and flashers blinking the way that they should.
I had similar findings with another car and with it running, stuff seemed to work better.

 

[Mattax]

I had similar findings with another car and with it running, stuff seemed to work better.

Same reason that headlights are dimmer with the engine off.
The battery at best provides power at 12.8 Volts
The alternator supplies at something around 14.5 Volts

The higher the voltage the more current the bulb will flow. And the brighter it will light up.
Give it too high of a voltage, and the bulb will burn out super fast.

The flasher units are essentially self resetting circuit breakers.
There is a flat bimetal connecting the in and out terminals. As current flows through the bimetal heats up and bends away from one of the contacts. More voltage, causes higher current and faster opening rate. One bulb out, it doesn't get hot enough to open.

 

[vocals]

Even if you take it to an electrical guy, you guys need a '69 Service manual so know what wires are what, and where they should connect.

You can download a digital version from www.mymopar.com and its free.

Yes the tach wiring may be part of the problem. See where it is getting power from. It may simply be showing the effect same as the dome light is.

Since the turn indicators in the cluster both work with the hazard switch on, that narrows down the scenarios.

Do pay attention to the ammeter. The needle shows 40 amps charge to 40 amps discharge. Anything over 20 amps either way is getting into problem territory.

Use your own common sense too. Since your noticing smoke, I agree soemthing is wired poorly or wrong.

Another resource for routing and connecting the wires is to buy a copy of the assembly drawings from Faxon. You can find threads here discussing those and decide if its worth it to you.

Oh hell no, not with this guy. He knows mopars and especially darts.

 

[vocals]

UPDATE: No one here could help but it's okay. No one would have guessed it. It ended up being the fender marker light wires were hooked up and my car doesn't have them. They were messing everything up. All fixed by an Auto-Electrical Tech here in BC in 1 hour. He did an amazing job.

 

[RedFish]

None of us can know what might have been done to one of these old girls in her past. Eyes on reveals. Happy moparing