A flat battery or failed light is the symptom. The cause may be a poor earth, damaged connection, charging problem or an unexpected load. We test the affected circuit before recommending batteries, chargers or other major components, so the repair addresses what is actually wrong.
Batteries that will not hold charge
Battery condition, resting voltage, charging voltage and current flow can be checked alongside terminals, earths and active loads. We look for resistance, poor connections and battery drain as well as battery failure. If the van charges from one source but not another, testing follows the charging path that is failing.
Charging while you tow
Anderson plugs, tow-vehicle feeds, auxiliary circuits and DC-DC chargers need to work together. We assess the power supply, earth path, cable condition, fuse protection and voltage drop through the connection. Where the fault sits in the tow vehicle, diagnosis can continue through our starting, charging and wiring repair service.
Tow-vehicle charging and wiring
Trailer plugs and road lights
Corroded plugs, water entry, vibration and damaged cables can cause several lights to fail together or a fault to appear only while travelling. We test plugs, sockets, earths, fuse and relay feeds and accessible wiring, then complete suitable repairs with the correct connections and circuit protection.
Electric brakes and breakaway wiring
Weak or intermittent braking, controller warnings and a missing trailer connection can involve the controller, power supply, earth, plug or brake circuits. We test the electrical side, including breakaway wiring and battery, and separate those faults from brake adjustment or mechanical wear. Connected running-gear concerns can be addressed through our caravan repair service.
Caravan brakes and mechanical repairs
Faults that come and go
A system may work in the driveway and fail after rain, heat or a rough stretch of road. Testing can include continuity, loaded voltage drop, current measurement and connector movement. We also check previous accessory installations, repeated fuse failures, switches, relays and old joins that may be contributing to the problem.
Solar input and 12V accessories
Poor solar charging, an unreliable DC-DC charger or a failing low-voltage accessory needs diagnosis through its supply and charging circuits. We assess the connections, protection and system operation. If your existing setup works but needs more capacity, our dedicated upgrade service can plan solar, lithium and 12V improvements around your travel.
Solar, lithium and 12V upgrades