FAQ
TL;DR: Fit a universal radio controller (approx. PLN 50) to the Audi A4 B5 central lock; "PLN 50 approx." [Elektroda, enhanced, post #16787987]
Why it matters: This FAQ shows beginners how to add remote locking cheaply and cleanly to a 1995 A4 B5.
Quick-Facts
- Typical parts cost: universal remote controller ≈ PLN 50 from marketplaces like Allegro. [Elektroda, enhanced, post #16787987]
- Minimum wiring: +12 V, ground, and correct lock trigger polarity (minus or plus). [Elektroda, enhanced, post #16788043]
- Common tap-in point: relay box area above driver’s footwell; side cover hides indicators/wires. [Elektroda, andrzej20001, post #16788002]
- A4 B5 (1995) often uses a pneumatic central-lock “compressor.” [Elektroda, autoas, post #16788083]
- Blinker confirmation is optional; the lock works without it. [Elektroda, enhanced, post #16788043]
Quick Facts
- Typical parts cost: universal remote controller ≈ PLN 50 from marketplaces like Allegro. [Elektroda, enhanced, post #16787987]
- Minimum wiring: +12 V, ground, and correct lock trigger polarity (minus or plus). [Elektroda, enhanced, post #16788043]
- Common tap-in point: relay box area above driver’s footwell; side cover hides indicators/wires. [Elektroda, andrzej20001, post #16788002]
- A4 B5 (1995) often uses a pneumatic central-lock “compressor.” [Elektroda, autoas, post #16788083]
- Blinker confirmation is optional; the lock works without it. [Elektroda, enhanced, post #16788043]
What’s the cheapest way to add remote central locking to an Audi A4 B5?
Use a universal radio controller for central locking. Expect about PLN 50 for the kit on Allegro. Connect it to the existing central lock system and pair the remotes. This is the budget route and works well for daily use. [Elektroda, enhanced, post #16787987]
Where should I connect the remote module in a 1995 A4?
Access the relay box above the driver’s feet. Above it is a connector with central-lock pins. Remove the side cover to reach indicator wiring if needed. This location keeps wiring short and serviceable. [Elektroda, andrzej20001, post #16788002]
Do I need to wire the turn-signal flash confirmation?
No. The central lock will open and close without signal flash wiring. As one expert put it, “You do not have to connect signaling.” Add it only if you want visual feedback. [Elektroda, enhanced, post #16788043]
What exact wires does the controller need?
Plan for three connections: +12 V, ground, and the lock trigger output with correct polarity (minus or plus). Many universal modules expose both. Choose the polarity your car expects. [Elektroda, enhanced, post #16788043]
How do I know if my 1995 A4 has a pneumatic lock (compressor)?
Most 1995 A4 B5 cars use a pneumatic central-lock pump, often called a compressor. If yours does, the remote controller simply triggers the pump, not individual door motors. [Elektroda, autoas, post #16788083]
What does “compressor” mean in this context?
It refers to the pneumatic central-lock pump that drives vacuum/pressure to lock or unlock all doors. Installers can integrate the radio controller to command this pump. “You can do anything with the compressor ... the easiest way.” [Elektroda, autoas, post #16788053]
Can I hook in at the master door actuator instead of the footwell?
Yes. Some kits are soldered near the master actuator. However, placing the controller centrally can simplify power and antenna routing. Choose whichever access is cleaner on your car. [Elektroda, enhanced, post #16787987]
Where should I place the antenna for best range?
Route the controller’s antenna slightly outside the metal cabin envelope. Avoid tucking it deep under the dash. A semi-exposed run behind trim improves reception. [Elektroda, enhanced, post #16788043]
What happens if I select the wrong trigger polarity?
If you choose the wrong polarity, the lock won’t respond correctly. Set the module to the minus or plus output your Audi expects. This avoids false triggers and no-ops. [Elektroda, enhanced, post #16788043]
Is blinker wiring required for safety or legality?
No. Blinker wiring is optional and only adds visual confirmation. The central locking will operate reliably without it. Many owners skip it for a faster install. [Elektroda, enhanced, post #16788043]
Do you have a quick 3‑step how-to for beginners?
- Identify access: relay box above driver’s footwell; plan antenna routing.
- Connect +12 V, ground, and select correct output polarity on the controller.
- Mount the module securely and route the antenna slightly outside. [Elektroda, enhanced, post #16788043]
Where can I find a wiring photo guide for the A4 B5?
See the linked A4-club walkthrough with connection descriptions and photos. It complements this thread and shows practical tap points. [Elektroda, andrzej20001, post #16789463]
Is there another thread that covers this exact topic?
Yes. A moderator shared a previously answered topic covering connection details for the A4 B5 central locking and remote integration. [Elektroda, T5, post #16788236]
I don’t care about flashers—just lock/unlock. Is that fine?
Yes. Many installs skip turn-signal integration. Wire only the lock control and power, and you’re done. Function remains identical. [Elektroda, enhanced, post #16788043]
