I made my mod long ago I fitted from a scrap yard a 2 element fitting into the fog lights so when just the back side lights were on there are 4 not just 2 and left the reverse alone and when the back fogs are on there is no problem you have to be carefull of not making it illegal having fogs to close to brake lights is a fail also i tried fitting led's when the first come out and it messed up the system you have to buy the one with no bus system (I think) maybe some one will tell you which hope this helps