Polaris 2009 Sportsman 300-400 HO Service Manual

Hello i have a Polaris 2003 sportsman 600 Polaris Sportsman OEM Gauge Speedo Speedometer Display Dash Cluster 3280425 the speedo is not working no 4*4 i can find nothing can i put a speedo 2004Speedometer Gauge Speedo
3280431 04-08 Sportsman if it will work

Just have a couple questions 
first does anyone else have an issue with the right hand tie rods coming loose 
second does anyone else’s power steering making a weird sound at times 

Does anyone know how to access the check engine codes on a 2018 450 sportsman. Just changed battery and spark plug . It runs fine but the light is on and I need this to plow snow and need it reliable. Any ideas . Thanks

Hi, I got a check engine light and a diagnostic code 520194 2 and i know it has something to do with throttle voltage out of range
I'd like to know if thats something that can be adjusted ? Or does anybody know what should i test  ?  I just bought this atv and I'm fixing it as its been in an accident. 
I also changed throttle leaver as original one was broken and I noticed inside the 4x4 selector assembly there are 2 contacts but I'm not sure if they're suppose to make contact at idle. I found some info online but some are saying they're suppose to touch and some say they're not. I think id depends of the year of the machine but I'm not sure. I'd really appreciate any help that i can get with this
Thanks 

I have a 2005 Sportsman 500, Instrument cluster will not illuminate, hi/lo beams work though.  Any tips or troubleshooting info is greatly appreciated!