RoadMaster BrakeMaster Second RV Kit # RM-98300 Wiring into Cold Side of Brake Light Switch

Updated 10/30/2020 | Published 10/28/2020

Question:

Brake li switch has 4 small wires going to it 1hot does it matter that those wires are so small . It does have a trailer brake under dash did not know if I can grab a cold side off that . This started with a second motorhome kit going from air in first motorhome to now going from hydraulic brakes to the add on air compressor kit from Roadmaster thanks for your help

asked by: Robert B

Helpful Expert Reply:

Yes, you can use RoadMaster BrakeMaster Second RV Kit # RM-98300 for motorhomes with hydraulic brakes. The size of the wires coming off the brake light switch should not be a problem but if it's easier you can wire into the brake switch wire going into the motorhome's brake controller connector. It should be the red wire.

Check out the video linked below for more details on this product.

expert reply by: John R