I'm glad I got that on my L4060. You are suppose to get the high capacity alternator if you get the defroster. The rear defroster is just a whole new rear window assembly with the heater elements built in.I bought a pronovost and added 3 RR to the l6060. Havent had much use for it till today. It is a stout SOB and weighs a good amount. I played with it once and realized I need a rear defroster for the cab.
Does yours throw an error if you turn the key on & don't start it within a few seconds? Mine does & the dealer warned me it would when I picked it up because of the HO alternator & resulting wiring harness changes. Not really a problem just odd & occasionally very mildly annoying.Mine has the HO alternator, I just didn't foresee how much snow would stick to the glass on the outside once it started throwing.
I'm glad I got that on my L4060. You are suppose to get the high capacity alternator if you get the defroster. The rear defroster is just a whole new rear window assembly with the heater elements built in.