[JRTJH]

IRV2,

You might also want to check the breakaway switch and plunger on the tongue of your trailer. Essentially it is nothing more than a plastic box with two spring loaded contact strips connected to two black wires. The plastic plunger is inserted in the hole to force the contact strips apart. Often times there is enough heat generated to melt the box or to melt the structure within the box that holds the contact strips. Damage to that box may cause it to fail the next time it's needed (in an emergency) so check it carefully and if there's any question about condition, replace it. They are typically less than $5 at any store selling trailer supplies. Tractor Supply is one such store and is substantially cheaper than an RV parts store for the same device.