Auto-Trail Electrical System
(Frontier, 2026 Model Year)
View official manual on manufacturer's site ↗Also Fitted To This Caravan
Frequently Asked Questions
Q: How do I connect the motorhome to a 230V mains supply?
Find the charger's own switch on the power unit and set it to off first, plug the orange hook-up cable into the vehicle, then connect its other end to the site's supply, press the RCD's test button to confirm it trips correctly, check every MCB has latched fully on, flip the power unit's switch back on, and confirm the reverse-polarity light isn't lit.
Q: Which fuse or MCB protects which circuit, and what rating should I use to replace one?
On the PSU (fuses 2 to 10 show a red LED beneath them once blown, while the charger's own fuse has a green LED to confirm it's working): Fuse 1 (25A, white) - Charger; Fuse 2 (7.5A, brown) - Permanent 12V; Fuse 3 (10A, red) - 12V Sockets; Fuse 4 (10A, red) - Appliances/Fans; Fuse 5 (15A, blue) - Compressor Fridge (when fitted); Fuse 6 (10A, red) - Pumps; Fuse 7 (10A, red) - Light Main & Dimmer 1; Fuse 8 (10A, red) - Light Main & Dimmer 2; Fuse 9 (5A, tan) - Awning/Entry Light; Fuse 10 (10A, red) - En Route/Electric Step; Fuses 11-13 (15A/7.5A/5A) - Spare; Fuse 14 (15A, blue) - Solar (rear fitting).
MCBs: MCB 1 (10A) - 230V sockets/cooker; MCB 2 (16A) - Extra 230V sockets/heating system; MCB 3 (10A) - Fridge/Separate Water Heater/Charger/Aircon. Always fit a replacement fuse rated the same as the original - never a higher one, since that risks damage to the wiring harness. If a new fuse blows again straight away, don't just keep swapping it out - get the underlying fault checked and speak to your dealer.