I just installed the factory towing wire kit on my 2003 RR. The instructions that came with the kit were straight forward with one exception. the kit instructed to add a new relay "To 4A 999999 green From 5A 000001 black/white". The wire kit came with two relays, one green and one black. The slot you are suppose to put the relay in is empty in stock configuration (without towing kit). My question is, which relay should be used, is it simply a matter of the amperage you expect to draw on the trailer?

thanks

 

no, its the opperation of the relay, they have different internal opperations, as the rear fuse box's are slightly different on 05's... you should be using the green one

 

Thanks, that makes sense now, but I never would have guessed from that from the instructions.