JonnWhite Posted January 24, 2015 Share Posted January 24, 2015 I'm looking to getting a modified elm reader for my car. Where is the best place to purchase one from? Don't want to get one on eBay incase they are dodgey! Also what is the switch on them for? Thanks! jon Quote Link to comment Share on other sites More sharing options...
troy45 Posted January 24, 2015 Share Posted January 24, 2015 The switch is used to allow the ELM327 to connect to both High Speed CANBUS (HS-CAN) and medium speed (MS-CAN) so it can access more of the modules on the car. Quote Link to comment Share on other sites More sharing options...
JonnWhite Posted January 24, 2015 Author Share Posted January 24, 2015 Ahh right! I see, so would you have the switch in one position, connect to the car and do some config. Disconnect, flick the switch and then re connect and get different options? Probably a stupid question! Used to my old vauxhall where i just plug it in and it worked haha! Thanks Jon Quote Link to comment Share on other sites More sharing options...
IINexusII Posted January 24, 2015 Share Posted January 24, 2015 you would just need to flick the switch and it will change the connection to do the other stuff the reason Vauxhall only have one switch is because the amount of stuff was limited, since GM suck! Quote Link to comment Share on other sites More sharing options...
jeebowhite Posted February 2, 2015 Share Posted February 2, 2015 just do a search on eBay, you can pick one up for £13 Quote Link to comment Share on other sites More sharing options...
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