Product Description
The Roadmaster 790 is a single Hy-Power diode for towed-vehicle wiring. Diodes tie the towed vehicle's brake light, running light and turn signal wiring into the motorhome's lighting signals while allowing current to flow in only one direction, from the motorhome to the towed vehicle's taillights. That prevents electrical feedback that could damage either vehicle's electronics.
Each Hy-Power diode has a heavy-duty, powder-coated aluminum heat sink, and its components are housed in an epoxy-sealed aluminum case for protection from the elements. Detailed wiring instructions are included. This listing is for one diode; most diode wiring setups use more than one, so check your wiring plan or choose a multi-pack.
Some newer vehicles with multiplex or LED lighting need Smart Diodes instead of standard diodes. Contact us with your vehicle's year, make and model if you're unsure.
Specifications
- Manufacturer: Roadmaster
- Part number: 790
- Type: Hy-Power diode
- Rating: 80 amp
- Quantity: 1
- Heat sink: Anodized, powder-coated aluminum
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Pro tipWiring and battery tips
- Protect the car’s wiring. Diodes or a separate bulb kit keep the motorhome’s lighting signal from feeding back into the towed vehicle’s electrical system.
- Watch the battery. Some vehicles drain their battery when flat towed; the owner’s manual will say whether you need a charge line or battery disconnect.
Not sure what fits? Send us your vehicle — we’ll confirm before you order.
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