There is a rattling sound by my front wheel when I

1-3-4-2

both sides?

check the knuckle joint at bottom of steering column, its usually where it meets the floor before going through to steering rack. hope this helps

Yes it is front wheel drive. I'm 100% positive.

Front wheel bearing Hyundai 1998/1999 :

1. Timken: Pn. TMSET41
2. Auto 7 : Pn. AU71000059 or equal

with price about $ 50 max. ( parts only)

Yes it will, but you need to make sure that the engine and transmission bolt patterns are the same. The drive axles might not fight the splines of the '99 front splindels. The lenghts of the drive axles might be different as well. Other than that you should be able to replace it.

It sounds like the CV joints are due to be replaced. Make sure you get them replaced and do not drive it too far, because the CV joints will fail anytime now. Once the CV joints fail, your going to have to get the car towed to get it fixed. Good luck and keep me posted, Oh and don't buy the car from there, who knows what else is wrong with the car that they are hiding from you. 

Your Accent has rear wiper/washer.. correct? That's where the 3rd wire comes in. They sold you/you bought the wrong pump. Here's the wiring diagrams:

THE 16 PIN OBD SOCKET IS UNDERNEATH THE STEERING WHEEL SHOULD BE VISABLE IF YOU LOOK UP FROM UNDERNEATH AS IF YOU WHERE LOOKING AT BACK OF INST.PANEL.

maybe cv joints. check cv boots to see if torn or look out for grease marks in the area behind front wheel. This would be more clicking noise though and not banging.