Where is the ABS unit located and how do I go about filling it? Any help would be appreciated.

 

For what car? On my '95 GS-R its near the RF fender, next to the air cleaner. It's got a bunch of steel brake lines, and a white plastic reservoir with a grey cap.

Pop off the cap & pull out the little vent baffle, then fill it. Do you have to bleed it too? There's a bleed screw right there.

 

95 GSR, what type of fluid do i need and is blleeding neccesary?

 

Brake fluid.

If the reservoir got empty, or low enough for air to suck into the pump & accumulator, you need to bleed it.

Put a hose on the bleed screw, hold the hose in a jar. There's a lot of pressure, so just barely open the valve a little bit. Let it go till it stops flowing, it'll be a couple ounces. Turn on the ignition so it pumps back up - I don't remember if you actually have to start the engine. All the while watch the reservoir so it doesn't get low. After doing this a few times, you won't get any more air bubbles.

Normally you do this last after bleeding your main brakes. So if you need to bleed your brakes, do them first.