Alko ATC Problems

The AL-KO ATC (Automatic Trailer Control) system is a renowned addition to modern caravans, offering enhanced stability and safety. However, like all technology, it’s not without its problems. Users have shared their experiences and solutions when faced with issues. Below, we delve into these problems and offer insights into potential fixes.

1. The Red Flashing Indicator Light

One of the most common issues users face is the ATC indicator light flashing red. A flashing red light suggests that there might be a fault with the system.

Potential Solutions:

• Manual Reset: The ATC manual provides a procedure where you can disconnect the 12s or 13pin plug, wait for about 5 seconds, and then reconnect it. If the system resets successfully, the light will turn green. If it continues to flash red, you’ll need to take further steps.
• Check the Push Rod: If the red light persists, you should inspect the ATC’s push rod position on the axle. If a red line is visible on the push rod, the caravan must not be moved until the push rod is removed, effectively deactivating the ATC. Two 17mm spanners might be necessary for this operation.

2. Handbrake Confusion

It might sound trivial, but ensuring the caravan’s handbrake isn’t engaged when checking the ATC is crucial. Some users have mistakenly diagnosed problems when the real issue was just the handbrake being on.

3. Wiring Issues

Some users have reported that incorrect wiring or improper wire sizes from the car to the tow hitch can cause the ATC to malfunction. Specifically, this can lead to the brakes being partially applied and the system refusing to reset, even after being disconnected.

Potential Solutions:

• Check Wire Sizes: Ensuring that the wires to the 13-pin connector are of the appropriate size and that there are no connectivity issues is essential. For optimal results, a heavy wire from the car battery to pins 9 and 13, with separate feeds to other pins, can help prevent problems.
• European vs. British Systems: It’s vital to ensure that tow bar harnesses are compatible with British caravan systems, especially since most European caravans don’t have connections for battery charging or fridge operations while being towed.

4. Intermittent Faults

Several users have noticed that the ATC can be temperamental, especially if the caravan has been stationary for prolonged periods. This is evident from users who have had to plug and unplug the system multiple times before achieving a green light after storage.

Potential Solutions:

• Regular Checks: Regularly checking the ATC, even during periods of inactivity, can help avoid potential hitches when it’s time to move.
• Persistent Resets: If faced with a stubborn red light, sometimes all that’s needed is persistence. Multiple plug-ins and plug-outs can sometimes do the trick.

5. Safety Concerns

The primary function of the ATC is to enhance safety. However, if the system isn’t designed to fail safely, such as ensuring brakes are off during malfunctions, it poses potential hazards.

Conclusion

While the AL-KO ATC system offers invaluable stability and safety benefits, it’s essential to be aware of its quirks and potential issues. Regular checks, understanding the system’s indicators, and knowing how to troubleshoot can make caravan journeys smoother and safer.