• Roadmaster Hy-Power Diodes 790-25
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Roadmaster

Roadmaster Hy-Power Diodes 790-25

Roadmaster Hy-Power Diodes 790-25

$323.90 USD
MSRP $433.90 USD Our price $323.90 USD
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Why buy from RV Towing Pros

  • Genuine new partsBrand-new Roadmaster, never used or refurbished
  • Fit GuaranteeSend us your vehicle and we’ll confirm fit before you order. How it works
  • Ships in 5–8 business daysIn-stock parts; express available at checkout
  • Secure checkout & 30-day returnsPay with card, Shop Pay, PayPal and more

Questions? Message us — we answer within 1 business day.

Shipping & Returns

In-stock parts: standard shipping 5-8 business days, express available at checkout. Out-of-stock and special-order parts: 3-5 weeks. Returns accepted within 30 days of delivery (20% restocking fee; buyer pays return shipping unless we made an error).

Fit Guarantee: if you sent us your vehicle details before ordering and we confirmed fit, but the part doesn't fit, we cover return shipping and waive the restocking fee.

Questions? Message us — we answer within 1 business day.

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Product Description

The Roadmaster 790-25 is a 25-pack of Hy-Power diodes for towed-vehicle wiring, a bulk quantity suited to RV dealers, installers and shops that wire multiple towed vehicles. 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.

Some newer vehicles with multiplex or LED lighting need Smart Diodes instead of standard diodes.

Specifications

  • Manufacturer: Roadmaster
  • Part number: 790-25
  • Type: Hy-Power diodes
  • Rating: 80 amp
  • Quantity: Set of 25
  • Heat sink: Anodized, powder-coated aluminum
  • Warranty: Roadmaster lists a limited 1-year warranty

Helpful Links

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.

Our Fit Guarantee Tell us your vehicle before you order and we’ll confirm the part fits. If we confirmed it and it doesn’t fit, we’ll cover return shipping and waive the restocking fee. Check my fit

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