Motorhome & Campervan Electrical Faults

COMMON MOTORHOME ELECTRICAL FAULTS WE FIX

12V Leisure System Faults The 12V system powers your lights, water pump, heating controls, and USB sockets when off-grid. Common issues include:

• Leisure battery not holding charge or failing to charge on hook-up
• 12V fuse board faults – blown fuses causing partial system failure
• Habitation relay failure – prevents battery charging while driving
• Split charge relay faults – leisure battery not charging from the engine alternator
• USB and 12V socket faults – internal wiring failures or blown fuses

EHU (Electric Hook-Up) Faults Problems when connecting to a mains hook-up at a campsite or home:

• RCD tripping immediately on connection
• Individual sockets or circuits not working on EHU
• Hook-up inlet socket damage or wiring faults
• No 230V power reaching internal sockets or appliances

Lighting Faults

• LED strip lighting failures – wiring or driver faults
• Cab interior lighting faults
• Habitation area lighting circuits failing intermittently
• Exterior lighting faults – step lights, awning lights, marker lights

Heating & Appliance Electrical Faults

• Truma or Alde boiler not igniting – control board or electrical supply faults
• Fridge not switching between 12V/240V/Gas – control unit or wiring faults
• Electric water pump not working or running continuously

Cab & Engine Electrical Faults

• Battery drain – parasitic draw draining the starter battery overnight
• Alternator and charging system faults
• Starter motor and ignition system faults
• Dashboard warning lights – diagnostics and fault code reading
• Central locking and window regulator faults

Solar Panel Faults

• Solar controller faults – panels not charging the leisure battery
• Poor or no output from solar – wiring, diode, or controller issues
• Solar system installation and upgrades

COMMON CAMPERVAN ELECTRICAL FAULTS WE FIX

Campervans share many of the same 12V and habitation electrical issues as motorhomes, with a few additions:

• Split charge and VSR (Voltage Sensitive Relay) faults – leisure battery not charging from the van’s alternator
• DC-DC charger faults (B2B chargers for modern vehicles with smart alternators – VW Transporter, Ford Transit, Mercedes Sprinter)
• 240V inverter faults – not converting 12V to mains power
• Roof vent, fan, and ventilation electrical faults
• Conversion wiring faults – issues with aftermarket wiring installed during van conversion
• Poor 12V wiring – undersized cable causing voltage drop and system failures

We work on all makes and models including VW Transporter, VW Crafter, Mercedes Sprinter, Ford Transit, Peugeot Boxer, Fiat Ducato, and Renault Master