plumkrazee70 said I'd like to know this as well. Do the mid 70 distribution block/brake warning switch look visibly different then the proportioning valve/brake warning switch? Click to expand...
plumkrazee70 said Ok, did some more digging. First picture is a drum/drum distribution valve with brake warning switch. Second picture is a disc/drum proportioning valve with brake warning light switch. View attachment 1715691926 View attachment 1715691928 Click to expand...