Auto-Trail Grande Frontier Owner's Handbook (2025)
View official manual on manufacturer's site ↗Technical Specifications
Fuse TableFuse 1: 25A White - Charger. Fuse 2: 7.5A Brown - Permanent 12V. Fuse 3: 10A Red - 12V sockets. Fuse 4: 10A Red - Fans. Fuse 5: 5A Tan - Appliances. Fuse 6: 10A Red - Pumps. Fuse 7: 7.5A Brown - Lights (main and dimmer 1). Fuse 8: 7.5A Brown - Lights (main and dimmer 2). Fuse 9: 5A Tan - Awning/entry light. Fuse 10: 10A Red - En-route/electric step. Fuse 11: 15A Blue - Compressor fridge (if fitted). Fuse 12: 7.5A Brown - Spare. Fuse 13: 5A Tan - Spare. Fuse 14: 10A Red - Solar fuse/poly fuse (rear fitting). Fuses 2-13 have a red LED below them indicating a blown fuse; the charger fuse has a green LED indicating the charger is working. Battery fuses: Battery 1: 20A Yellow - fuse remotely located near battery. Battery 2: 20A Yellow - fuse remotely located near battery (where fitted). EM40/EM41 Interface Unit fuses: 1: Spare. 2: 5A Tan - Marker lights. 3: 20A Yellow - Towbar +. 4: 20A Yellow - Vehicle battery. 5: Spare. 6: 20A Yellow - Fridge +. 7: 20A Yellow - Towbar D+. 8: 20A Yellow - Fridge D+. Fuses are dependent on PSU version, so not all fuses may be present.
Mcb TableMCB 1: 10A White - 230V sockets. MCB 2: 16A White (sockets)/Yellow (heater) - Extra 230V sockets/heating system. MCB 3: 10A Black (fridge/water heater/charger)/Blue (air con) - Fridge/separate water heater/charger/air con.
Parts & Appliances Fitted
Master Troubleshooting & Diagnostics Matrix
| Error Code / Indicator | Symptom / Meaning | Step-by-Step DIY Fix | Suggested Actions |
|---|---|---|---|
N/A | Water pump runs on for more than 5-10 seconds after closing all taps Possible Cause: Possible leak in the system | Check the system immediately for leaks. Always switch off the pump at the control panel when leaving the vehicle. | DIY Safe |
N/A | Aerated water from a tap Possible Cause: Possible leak on the suction side of the pump | Check the suction side of the pump for leaks. | DIY Safe |
N/A | Flame lifting away from the burner Possible Cause: Gas pressure is too high | Recheck the regulator, cylinders and pipes and adjust as necessary. | DIY Safe |
N/A | Yellow flame causing soot Possible Cause: Gas pressure is too low | Recheck the regulator, cylinders and pipes and adjust as necessary. | DIY Safe |
N/A | Smoke alarm emits a short beep once a minute Possible Cause: Battery is at the end of its life | Replace the battery immediately. (Low voltage warning sounds for approximately seven days). Recommended PartAffiliate link Duracell Plus 9V Alkaline Battery (2 Pack) 6LR61~£6.50 for 2Amazon's Choice, 4.7★ (15,000+ ratings) View →Most caravan smoke alarms take a standard 9V battery like this one - worth a quick check against your own alarm before ordering, since a few models differ. | DIY Safe |
N/A | Smoke alarm LED indicator does not flash every minute Possible Cause: Battery is completely flat | Replace the battery immediately. Recommended PartAffiliate link Duracell Plus 9V Alkaline Battery (2 Pack) 6LR61~£6.50 for 2Amazon's Choice, 4.7★ (15,000+ ratings) View →Most caravan smoke alarms take a standard 9V battery like this one - worth a quick check against your own alarm before ordering, since a few models differ. | DIY Safe |
N/A | Carbon monoxide detector emits a single audible chirp once per minute for up to 30 days Possible Cause: Incorrect settings of sensor/circuitry or low batteries | Check settings or replace the batteries. (Note: this does not mean that the detector has detected carbon monoxide). | DIY Safe |
N/A | Burner accidentally extinguishes | Turn off the control and do not attempt to re-light for at least one minute. | DIY Safe |