Yota brake/blinker issue

[frankenyoter]

Got a call from a friend. Trying to trouble shoot an electrical issue without seeing the vehicle.

Basically the brake lights work. The blinkers work. However they will not work t the same time. So at a light with your foot on the brake the blinkers will not blink


It is a 79 Yota 4x4 truck.

 

[BrianGreen]

Does the truck have a trailer wire harness? Sometimes those control boxes will act up. They combine the brake and turn signal.

 

[frankenyoter]

No trailer wires.

 

[BrianGreen]

Got me stumped. Turn and brake/tail are separate circuits. How do the running lights operate?

 

[Tim C]

I'd start checking grounds. Including the ones in the actual sockets. Typical bad ground symptoms.

 

[frankenyoter]

That was my initial guess. New bulbs and clean sockets with something.

I will post up what he finds and try to get a photo or two.

Thanks everyone.

 

[strange1]

Recently swapped in led's? Like said above, those should be completely seperate circuits on a yota.

 

[frankenyoter]

Not LEDs. They are original equipment.