E-Class (W124) 1984-1995: E 260, E 300, E 320, E 420, E 500 (Includes CE, T, TD models)

aftermarket headlight on/off device

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Old Mar 23, 2022 | 06:36 PM
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Mohammed Abood's Avatar
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w124 e320 1994
aftermarket headlight on/off device

Hi everyone,

Kindly I’m seeking help with the aftermarket headlight on/off device. I tried to connect it directly with the headlight switch. Thing were looking sparkling I located the main red chunky wire which supplies the 12v directly and the additional big pins on the large light switch now I made the connection even to the ignition switch as well so system will be on standby mode when the car is off and all and things were promising and looked ok.

But when you start the hazard flasher while the car light on auto mode the relay which is charge of auto lighting just shuts off completely sometimes permanently and sometimes for a minute then the auto light goes back on. Once again this happens only when the hazard flasher is on.

Now what I did is …..considering the car is US version the side corner lamps will be on in the secondary lights ignition.

Now I disconnected the line which going to the corner lamps from the auto headlight device and kept the headlights only. Started the flasher and things were ok. So there seems to be some back current from the signal lamps to the device when their on.

I tried to find some other wires which can lead to a successful result but couldn’t. How can I fool the system and makes it believe I’ve switched the headlight lamp on and don’t conflict with the car system negatively.

Why this issue doesn’t happen when I switched the headlight from the main switch and start the hazard button and things are just fine.

Any clues plz…..I need help.

Moe
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