
Originally Posted by
imdying
The circuit is very simple:
Indicator fuse =>
Flasher relay =>
Switch gear =>
Indicators =>
Earth
The flasher relay has a little thing inside it that charges up when the light is on, then cuts the power, then does that over again. So, anything after that flasher relay is an off/on signal, when a direction is selected.
How long it flashes for depends on how long it takes to charge it up... and that is based on how much power is flowing through it. Dirty connections will increase the resistance in the circuit, which means less power flows, which means a change in the time. It's also the reason why it flashes faster when a bulb blows, and it's also why LED indicators (which flow fuck all power) need a different style (electronic rather than pseudo mechanical) flasher relay.
If the two directions are flashing at a different rate, then it's likely that somewhere between the switch gear and the earths for the indicators on that side, are dirty connections. It is also possible the contacts inside the switch itself are dirty.
My advice would be to remove every bulb (both sides), check the bulb connector is not dirty (scrub it with a scotch brite pad), and then remove the two wires for each indicator from their connectors, and ensure they are clean (something like CRC CO contact cleaner and a tooth brush should be sufficient). Then ensure the earthing points for the loom (any 'black with white tracer' wires that bolt to the chassis or battery negative terminal) are clean, shiny, and tight.
If that fails to fix it, you'll need to remove the left hand switch gear (typically only two screws) and then spray the crap out of it with CRC contact cleaner (or similar)
If all that fails, or is just gibberish, report back and we'll see what we can figure out.
If you're electrically inclined, you can also use a multimeter to diagnose the low voltage/high resistance in the circuit pretty easily.
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