307 Model 3C KFUC ... FAULT WITH INDICATOR / FLASHERS

I have an intermittent fault with my flashers on this car.
Sometimes, the flash speed appears to be about 3 times as fast as it should be.
This will last a few seconds and then return to normal.
I suspected a bulb - But both left and right-turn flashers are affected - So that rules that out.
When the fault occurs, all three bulbs flash quickly ... front, rear and side.
The dash board indicator also flashes quickly.
I now suspect the module / relay.
Does anyone know where to find it ?
Any helpful suggestions would be welcome.
Thanks.
Johnsco.

 

I found the answer to my question and cured the problem.
It was caused by the earth-return pin on the connectors to both the rear light clusters.
This pin gets overloaded and fails.
I cured it by soldering a jumper wire onto the earth track of the light clusters and feeding it out of the light unit by-passing the damaged pin.
I then connected it back into the correct wire on the other side of the connector.
Simples !!! Worked fine and cured the problem.
This appears to be a very common problem on 307s.
Poor design.

 

Thanks for reporting back with the solution @Johnsco - glad you got it fixed.