Light update Audi C4 100 / A6 C4 // Audi 80/90 B4 81 85 4000

Retrofit kit relay control for main headlights (low & high beam)

Improve your vehicle's lighting performance by converting to relay operation! This retrofit kit consists of prefabricated and pre-wired components that switch the operating current for the main headlights (low and high beam) via separate relays instead of the steering column switch.

In the future, the light switch will only supply the control current of approximately 150 mA to the relays—instead of the previous approximately 10 A. This reduces the load on the light switch, prevents contact burnout, and avoids voltage losses of 1-2.5 V. Without this measure, the lamps often receive only 9-11 V instead of the required 12-13 V, which can reduce the light output by up to 50%!

Your advantages with the relay retrofit kit:

• Protecting the light switch by relieving it of the high working current

• Higher voltage on the headlights (approx. 13-13.5 V) for up to 50% more light output

• Works on vehicles with and without lamp control unit – lamp monitoring remains intact

• Easy installation between steering column switch and fuse box, in front of the lamp control unit

• Only one relay per light type (low beam and high beam) required

• Power supply is provided directly via the central electrical system using a 4 mm² cable (red) – additional relay protection is not required

• Quick installation in about 30 minutes, even for enthusiasts with basic knowledge

This relay circuit significantly increases the effective voltage at the lamps, preventing premature wear of the lamps and sustainably improving road safety.

Custom-made — no exchange or return possible!

Upgrade now and ensure brighter, safer light!

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