Only getting 8 volts to the brakes

[Moneyslinger]

I just discovered this very same situation on new replacement axles/brakes. Grease everywhere!!!! Especially bad because the seals were not installed all the way in!!! On top of that, the rear axle had the brake assemblies reversed. All fixed now.

[bbells]

Does your truck have a built in brake controller? If so, the 8 volts may be normal if you aren't moving and slamming on your brakes. The big question, do your trailer brakes work when driving? If you have a built in controller the brakes will feel soft.