Is Roadmaster RM-88400 Brake Lite Relay Necessary to Flat Tow 2018 Buick Envision

Updated 07/10/2020 | Published 07/08/2020

Products Featured in This Question

Roadmaster Brake-Lite Relay Kit for Towed Vehicles

(780)

$41.90

Roadmaster Stop Light Switch Kit

(710)

$41.68

12 Volt Outlet Kit, 20 amps

(409)

$46.70

Roadmaster FuseMaster Fuse Bypass Switch for Towed Vehicles - (2) 20-Amp ATM Mini-Fuses

(377)

$116.37

Question:

Will I need the brake relay RM 88400 with a RViBrake 3 or other portable, proportional braking systems?

asked by: Tom K

Helpful Expert Reply:

According to Roadmaster, you won't need the # RM-88400 brake light relay for a portable braking system. You will however need a brake lamp switch like # RM-751482 and a 12-v outlet like # RM-9332 if the braking system you choose does't include one.

Because Buick recommends that two fuses be pulled for flat towing, I'd also recommend the Roadmaster fusemaster, part # RM76512 which will allow you to bypass those fuses with the flick of a switch instead of needing to locate and pull them each time (and remembering to put them back in afterwards).

You'll also need a tow bar, base plates, a wiring solution and perhaps a high/low adapter if the height difference between the installed base plate and the receiver on the motorhome is greater than 3 inches. If you'd like some recommendations, let me know. I'd be happy to help.

expert reply by: Mike L