well i earthed the ballasts on my inner wings to start with and 1 would intermittantly go off or hi-beam wouldnt work ect so i extendd the earth wires straight onto the battery and havnt had a problem since just make sure u get the beams set up after fitting an mot station can do it for like £5

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took it to my mums mate to do the beams and got it done free :p i did take a tutorial guide from the mazda service thingy with me though lol

erm...i think mine dont need earthing then cos the guide dont say they need it and they dont have any earthing wires....what would i do to earth them myself for security? Cheers

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you would need to turn them on and power probe/multi meter to find the earth and join onto it (DONT CUT IT) and then earth it out on battery or body

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