Headlights flickering on and off while driving and when I turn them off they stay on and when I turn them on they go off.

Sometimes, a headlight may start flickering due to physical damage to headlight components. The inside of the connector may start to melt, causing a poor connection. the bulbs or lamps of your headlights are old or damaged, it can cause the headlights to flicker. Fortunately, this can be a relatively quick fix.

When the alternator starts to give out, your car’s electrical output is affected. This could result in flickering, dimming, or inoperative headlights, as the headlights depend on power from the vehicle's battery. When the alternator is unable to charge the battery, the vehicle's electrical system will quickly drain the battery. One of the most common causes of headlight flickering is a dying battery. Your headlights rely on power from the battery to function properly. If the battery is failing, flickering, or dimming headlights may be the result. In this situation.

Your battery could have a loose connection,follow the negative cable and see if it is getting a good connection.

You most likely have a bad headlight relay or a bad headlight switch.

When my headlights started to flicker at night, I soon found out it was the battery. It died one night sitting in a friend's driveway with the radio and headlights on. My battery was over 5 years old at the time, and the tow truck driver said I was lucky to have it work that long. I purchased a new battery and the lights no longer flicker at night. Just a suggestion. Hope this helps you.

COULD BE FAULTY DRL HEAD LIGHT RELAYS OR FAULTY DIMMER SWITCH.SINCE HEADLIGHTS TURN ON AUTOMATIC.TRY USING MANUAL HEAD LIGHT SWITCH ON TURN SIGNAL SWITCH LEVER SEE IF HEADLIGHTS STAY ON IF LIGHTS STAYS ON YOU HAVE FAULTY DRL HEADLIGHT RELAY.IF LIGHTS STILL FLICKER OFF.YOU HAVE BAD DIMMER SWITCH.

Your car probably uses a CAN-bus system where almost every function is subject to computer decisions.

A low battery can cause strange things to happen.

Bakkie ?
Anyway, try your headlights on full beam. If they dim to almost off when you try to start then most likely its your battery. If they only give a slight flicker but stay bright its most likely the solenoid on your starter motor thats failed. A push start will get you going so you can drive to a dealer.

even though there are accessories on, there may not be enough to turn starter over. Or the connection is bad or not metal to metal contact. Last possible cause would be faulty solenoid.

The headlamp switch will cause the lamps to turn off. The switch heats up and turns the headlamps off. It will cool down and work for about 10 minutes and cut out,

Get your alternator checked .Does the car turn over on the starter motor without a jump start ?
I'm Picking either Alternator or bad earth.
Cheers
George