What Is The Difference Between The Roadmaster Smart Diode Kits RM63MR And RM38FR?

Updated 08/06/2025 | Published 08/03/2025

Products Featured in This Question

Roadmaster Smart Diode Kit for Variable Voltage LED Tail Lights - 7-Way to 6-Way Adapter Cord

(287)

$216.25

Roadmaster Smart Diode Kit for Variable Voltage LED Tail Lights - 7-Way to 6-Way Adapter Cord

(287)

$268.84

Question:

Whats the difference between rm63mr and rm38fr? Thank you.

asked by: James K

Helpful Expert Reply:

That is a very good question, James!

I was going back and forth between them until my head started hurting, so I decided to just ask Roadmaster. What I learned was Earth shattering... not really.

They are actually the same thing, but the Roadmaster Smart Diode Kit # RM63MR has instructions that are catered to Jeeps with the ParkSense feature and the Roadmaster Smart Diode Kit # RM38FR has more generalized instructions. That's the only difference.

What is the year, make, model, and trim of the vehicle you are wanting to install this in?

expert reply by: Lazer S

James K.

8/5/2025

I could not tell any differences so I order the cheaper one. It's going on a 2005 Jeep LJ that has been retrofitted with LED tail lights, so either way it should work. Thanks for your honest reply. Jimmy K

Lazer S.

8/6/2025

@JamesK I would have done the same! And you are very welcome. Let me know if there is anything else I can help with! Oh and if you end up needing them, I attached the more generic instructions as well.

Helpful Links

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