Zigawo za trailer brake system zomwe zimaperekedwa ndi Trans-Power zimapangidwa ndikuyesedwa motsatira muyezo wa SAE: SAE J639: Njira yoyimitsidwa yamagalimoto a trailer, komanso zomwe makasitomala amafuna.Pofuna kuonetsetsa kuti kubereka mphamvu, chitetezo, bata, moyo mogwirizana ndi zofunika za zinthu ntchito mankhwala, kuonetsetsa lonse khalidwe ndi chitetezo ngolo.
