Alko recommend 20 amp fuse for their ATC on pin 9. Again ISO 11446 recommends 20 amps for pin 9, and 15 amps for pin 10. Ryder Bypass Relays are a common tool in automotive engineering, providing an easy and reliable way of bypassing components - such as electronic throttle bodies, circuit breakers and low current circuits - to ensure they remain protected while the automotive runs. It is important to understand how to read the wiring diagrams associated with these relays.

They monitor the trailer flashers with both a built-in buzzer and a wire for a remote sounder or warning lamp. I'm afraid you are wrong with your adding up. Worst case scenario, 3 brake lights- don't forget high level light, could be 63w. Indicators x2 don't forget hazard lights. Side lights, don't forget all the side repeaters which may not be LEDs, my docs allow 52watts each side, fog light, there could be 2, therefore 42watts. All in all it adds up to nearly 300w, i. e. requiring a 25 amp wiring and fuse just for the trailer lighting. All the power to switch the relays and to operate the trailer lights comes directly from the vehicle’s fusebox or battery.I always wire up my own towbars and the vehicle specific wiring for my Mitsubishi stipulates one 25 amp circuit, one 20amp circuit and one 15 amp circuit as required by ISO 11446. It is also helpful to pay attention to the number of terminals and connections the wiring diagram allows for. Parts with fewer terminals require fewer connections, while components with multiple terminals require several connections.

UK Scottish Highlands and Isles w e use a two-day courier service for mainland UK, but please allow up to five working days for your delivery.You can use the polarized symbols — those denoted by either a (+) or (-) — to establish whether a specific part of the device is connected to the electric charge or not. The part of the device marked with (-) will not be connected to electric current, and the dot on the left hand side of the symbol indicates the trajectory of electricity. The signal wires to the car’s rear lighting loom are protected so that only a milliamp can pass from the car to the relay and nothing can pass from the relay to the car. NOTE: One fuse protects: Stop lights; RH tail light; LH tail lightThe other protects LH flasher; RH flasher; Reverse; Fog AND will switch off all circuits if it fails FORD TRANSIT INSTALLATION When fitting the relay to a Ford Transit or in similar condensation-prone environments, we recommend putting a coating of grease/sealer over exposed terminals.

UK Scottish Highlands and Isles w e use a two-day courier service for mainland UK, but please allow up to five working days for your delivery. Retail Delivery – All UK Islands & IrelandThey use smart logic to deal with cars that have one bulb handling two functions (e.g. brake lights and sidelights sharing the same bulbs). This smart bypass fits virtually all cars, handles cars with standard or modulated circuitry (e.g. two functions in one bulb) and has a quiescent current of zero. All UK Islands, Northern Ireland, and exports: Charges will be as agreed between Ryder Towing and the customer (Price On Asking).