I have a Bailey Unicorn S2 which I tow with a Volvo XC90. At the start of a recent trip back to the UK I connected up the 13 pin lead and the AL-KO ATC did its usual self-test and the green indicator light came on. As usual on the ferry (and I don’t know why I do it) I disconnected the 13 pin lead and reconnected it prior to getting off the ferry – again all was as normal. On arriving at my destination, none of the interior electrics were working. I checked the fuses and discovered that 2 had blown – the 20amp one marked “van battery” and the 15 amp marked “Car”. I thought that was strange but replaced them – all returned to normal and there were no more problems until the time came to return to France.
I connected up the 13 pin lead and nothing happened – no self-test, no green or red indicator light. Everything else (road lights, fridge, water pump etc) was as normal. I didn’t have time to check things at the time but did when we stopped at various times on the way to the ferry – there was no change. On arriving home I again checked the fuses and none had blown in the caravan. However, one had blown in the car. This is fuse 7 in the load area fuse box and according to the car handbook is the “Towing bracket wiring(30-feed) 15 amp” fuse. I don’t know when this fuse had blown but suspect that it had probably blown at the same time as the others.
Once I replaced this fuse, the ATC did its self test but still no indicator lights.
I’ve examined the small LED light on the draw bar and there appeared to be condensation in it. I’ve disconnected it and cannot get it to light when connected to a 12v supply. However, when I connect a non-LED test bulb to the lead coming from the ATC control box I cannot get it to light when the ATC does its self-test.
My questions to forum members are:
1. Would the LED bulb failing due to water ingress cause the fuses to blow?
2. Is it possible to test a circuit which normally has an LED bulb in it using a halogen bulb?
3. If the indicator light is not green (but not red either) and the system has done its self-test, is the ATC working?
4. Has anyone got any suggestions as to what is wrong? (Please don’t just say to take it to a dealer, they are not that common out here!)
I connected up the 13 pin lead and nothing happened – no self-test, no green or red indicator light. Everything else (road lights, fridge, water pump etc) was as normal. I didn’t have time to check things at the time but did when we stopped at various times on the way to the ferry – there was no change. On arriving home I again checked the fuses and none had blown in the caravan. However, one had blown in the car. This is fuse 7 in the load area fuse box and according to the car handbook is the “Towing bracket wiring(30-feed) 15 amp” fuse. I don’t know when this fuse had blown but suspect that it had probably blown at the same time as the others.
Once I replaced this fuse, the ATC did its self test but still no indicator lights.
I’ve examined the small LED light on the draw bar and there appeared to be condensation in it. I’ve disconnected it and cannot get it to light when connected to a 12v supply. However, when I connect a non-LED test bulb to the lead coming from the ATC control box I cannot get it to light when the ATC does its self-test.
My questions to forum members are:
1. Would the LED bulb failing due to water ingress cause the fuses to blow?
2. Is it possible to test a circuit which normally has an LED bulb in it using a halogen bulb?
3. If the indicator light is not green (but not red either) and the system has done its self-test, is the ATC working?
4. Has anyone got any suggestions as to what is wrong? (Please don’t just say to take it to a dealer, they are not that common out here!)