All Alpines do not have the same wiper systems. Earlier Alpines were designed AM Equipment Windshield Wiper Systems & Durable DC Motors
, who make quality wiper system. As I remember they had two motors and worked good. I had no problems when I had my 2000 Alpine.
On my 2007 someone else designed them and they tried to use one motor for two long blades. I tried several different blades and nothing worked very good. In my opinion, the blades were too long for one motor.
I talked to Butch at AM Equipment and told him my problem. Even though, it wasn't their system anymore on Alpines, he told me what I needed to convert it over.
Arm 30" Pantograph, BL, Medium Duty, Wet, 1.25" Bridge
Framed Blade 302-1200
Blade 20" Flex, 91 series
I do not need those long blades and I can see fine. The shorter blades work a whole lot better.