Exterior Components› Body Panels and Components

Roadmaster Inc

SMART DIODE INCAND. SINGLE

$43.06

SKU: R01S 780

Out of Stock
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Overview

The Roadmaster Inc. 780-12 is a bulk pack of twelve Smart Diodes designed for wiring towed vehicles with multiplex lighting and incandescent bulbs. These diodes prevent the backflow of current, protecting the electrical systems of both the towed vehicle and the RV from potential damage to computer modules. Smart Diodes modify the voltage from the motorhome to correctly light up the intended taillight signals on the towed vehicle, ensuring proper function and appearance.

These diodes can also be used in place of regular diodes. They are beneficial because only two Smart Diodes are required per vehicle, compared to the four typically needed for traditional diodes. The product features an aluminum heat sink to prevent overheating and is encased in epoxy for protection against the elements.
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SMART DIODE INCAND. SINGLE

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandRoadmaster Inc
Part NumberR01S 780
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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