hi ,,I just changed mine, was really melted from loose common wires.. smelled bad when it ended...and it was plastic but don't worry about that as they are fire proof, although the do distort.. I hand an old iwota. and replaced with a progressive dynamics model pd52v..$130 from amaz. they are very easy to wire...the fproblem is what gage wire to handle...mine is very thick and I think 6ga, was hard to get into the clamp slots.. what I did was put wire thru hole and cut each wire correct length. on the switch it has very detailed wire position and you would have to be trying if you get it wrong. ooh mine is 50 amp not 30
2007 Alfa Gold!! model 1008. 400hp Freightliner, IFS!!