SOS
If the turn signal relay & hazard (emergency) relay are side by side, turn on the emergency blinkers. You will hear & feel (if you touch the relay) the emergency relay clicking. Turn signal relay is the other one.
Turning without signal
An upside down flag is generally recognized as a signal of distress, and should be used only during an emergency.
The turn signal flasher relay switch and the emergency flasher relay switch are the same switch. The relay switch might be labeled as the emergency flasher switch, but it is also the signal flasher relay switch.
Acute appendicitis is most common acute abdominal emergency.
Emergency distress signal
Not sure what vehicle you have but with most vehicles the signals and emergency flashers are separate circuits. Each have there own fuse and flasher. Check fuses, bulbs and flashers. If all checks okay it may be the signal switch at fault.
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unsual odors
Turn on the hazard switch (emergency blinkers). You should hear it under the dashboard on the drivers side. The emergency blinker and turn signal are each controlled by a different relay but the relays look alike. Once you've located the emergency blinker relay, the turn signal relay is nearby.
The two most common battery types used for emergency lighting are lead acid and nickel cadmium.