Alpha Romeo 156 My Left hand indicator light stays on continually, does not flash. and when I turn the hazard light switch on both indicators continually glow.

Only the bulb is linked with those seperate items the bulb runs both blinker and hazard normally one goes both go when u have tufrn signal on inside if u hear it flashing fast its ur bulb

It may have a problem in the electronics that shift the transmission, have a fault code test run on the Transmission control module (TCM)

flasher relay under steering column does not work,switched it with hazard and see if it works,then get the new one,make sure the light on turn signal in front or back is not burned out first

Have you tried turning off the switch that puts the lights on ?

In my case the left front turn indicator lamp worked, but not the left rear indicator, although all the lamps would turn on with running lights activated, as well as the backup light and 'night-light' mode. The left rear turn indicator would not work with the hazard lights activated. I tested the combination switch (this is the left/right turn indicator switch you use when driving to indicate which direction you are going and is mounted/located on the steering column) and it tested O.K.. I had good continuity from the combination switch black wire, and resistance on the blue-white wire from there to the left rear turn indicator lamp, as well as good continuity on all wires going out from the left parking light fuse. Since the Haynes manual indicated that the flasher module was probably good if it made the tell-tale clicking sound, I was feeling perplexed. So I took it into a local shop that specialized in auto electrics and it turned out to be the flasher module. I was under the impression that it operated in a straight-forward left-right manner, but apparently it has a different circuit for each turn indicator lamp. So even if it is making the appropriate clicking sound when the combo switch is flipped, it could still be the flasher module. Obviously the manual leaves a bit to be desired in the troubleshooting of malfunctioning turn indicators.

Check your your bulbs and bulb holder for corrusion,if good,then check your brake light switch that is attached to the brake pedal,could be just needing adjusting.Push pedal in with hand so you can see switch engaging.

did you change the battery ? wrong amps or voltage could do that sometimes. it's called reverse polarity.

There are 3 I think . The main one is behind the panel between the steering column and the drivers door. There should be a screw knob thing on the the upper side of the cubby hole. Undo that and the panel should fall down. The drivers door needs to be open though.
There are some main fuses in the little box on top of the battery and there are some more relays inside the glove compartment. You have to prize off a panel on the upper part of the glove box first.

Hi

Is the yellow warning light (looks like a light bulb) showing on your rev counter when you turn the ignition on as well?

flasher relay