RX25SE wrote:Looking at the wiring diagram it seems that both the LH & RH indicator stalk switch and the hazard switch provide a ground signal to the Turn Signal Hazard Module. Activating a switch would most likely ground a 'pull-up' resistor in the module, causing a driver to open and close at a fixed cycle causing either the LH, RH or both indicators to flash.
It could be a failed module (I suspect you should have the same symptoms when activating the hazard switch) or poor contacts in the indicator switch assembly.
You could test the module by unplugging the indicator (combination) switch and connecting either terminal 5 (LB wire) or terminal 6 (RB wire) of the Turn Signal Hazard Module to a good ground with the ignition turned on. This bypasses the LH & RH indicator input signal circuit.
If you get the same symptoms, the fault lies in the module.
If you have the w/shop manual, the wiring diagram is on page 5064.
When the issue occurs, its like it reappears in a set sequence, is that possibly related to opening/closing at a fix cycle?
I’ve had an auto elec look at it, but couldn’t replicate the issue (randomly comes and goes, so frustrating). Surprised a new relay did not help.