After installing my new electrical brake switch on the PDWA it started leaking out the top of the switch right away, I sent it back to Moss for a refund, so here is my permanent fix that some of you might be interested in. It will not be for everybody--but it does work.
I removed the large threaded plug and pulled the plunger out of the PDWA housing and drilled the bore out to 23/64 down about 3/4"--I didnt go all the way through the bore -leaving a small shoulder at the bottom. I then tapped out the hole to 3/8" NF and screwed in an automotive allen head-set screw 3/8"x5/8"NF. I screwed it in untill it bottom out on the shoulder at the bottom of the hole, this leaves the screw almost flush with the top (outside) of the bore. I plugged the switch hole with a 3/8"x 1/2"nf screw and copper washer. Screw the large threaded plug back in and it is ready to go----it has worked good for me with no more hassles or leaks. For ORIGINALITY you can use the electrical switch on the top instead of a 3/8 plug but you will have to snip off its small brass plunger or it will activate the warning light and then you can still plug the wire in. --- USE THIS MODIFICATION AT YOUR OWN RISK.---
I removed the large threaded plug and pulled the plunger out of the PDWA housing and drilled the bore out to 23/64 down about 3/4"--I didnt go all the way through the bore -leaving a small shoulder at the bottom. I then tapped out the hole to 3/8" NF and screwed in an automotive allen head-set screw 3/8"x5/8"NF. I screwed it in untill it bottom out on the shoulder at the bottom of the hole, this leaves the screw almost flush with the top (outside) of the bore. I plugged the switch hole with a 3/8"x 1/2"nf screw and copper washer. Screw the large threaded plug back in and it is ready to go----it has worked good for me with no more hassles or leaks. For ORIGINALITY you can use the electrical switch on the top instead of a 3/8 plug but you will have to snip off its small brass plunger or it will activate the warning light and then you can still plug the wire in. --- USE THIS MODIFICATION AT YOUR OWN RISK.---