Replacement Battery For Hopkins Engager Breakaway Kit

Updated 02/03/2026 | Published 07/24/2024

Question:

on My Hopkins Engager HD, when I pull the break away pin the brakes wont engage. truck power cable connected, pulled break away pin- brakes wont engage. brakes will engage with power cable connected and applied manual control in cab. internal battery connection broken off. should I replace battery or entire system

asked by: Keith W

Hopkins Engager Battery Connetion
(click to enlarge)

Expert Reply:

Hi Keith; you could replace the battery with the # HM20008 but I would go ahead and replace the entire thing with # 20099. If you replace the whole kit you're getting the battery and a usable battery connection plus you don't have to worry about other parts wearing out (especially since one already did) which would end up costing you more in the long run.

expert reply by: Robin H

Robin H.

2/3/2026

Hey Keith, how did things turn out after replacing your Hopkins Engager breakaway kit? Did the new setup get your trailer brakes working properly again? Your update could make it easier for the next person with the same issue.