I have a 1996 dodge caravan my oil lite stays on and dings i have had the oil changed and also changed the oil sending unit. this lite is still on so i thought it might need to be reset the oil lite and i do not know how to do that please help.

Let's give this a shot... first is the question because the oil pressure light stays on when running? The first video tells how to accurately diagnose the pressure switch for fault (most common with Voyagers).
Auto Repair Maintenance How to Check if an Oil Pump Is Bad

The second is how to remove the oil pan to get to the oil pump if it is bad... this guy is just changing the gasket but the work is the same for your Voyager...
Replace oil pan gasket on 01 Dodge Caravan

And last, if it turns out to be just the sender as is most of the cases this next video shows how to change the sender unit on a Caravan which is a Voyager in sheep's clothing...
dodge caravan oil sending unit replacment

Noise is caused by brakes wearing. Either brakes shoes are worn, disc is out of round. Sound you hear is metal rubbing on metal, never a good sound. Contact auto repair or brake shop for repairs immediately

Safety systems can be surprising...my first inspection would be to check the fluid level in your brake master cylinder...the warning light may not be working...Hope this helps.

Locate your oil sending unit and see if its gone bad.

CHECK YOUR OIL LEVEL RIGTH AWAY MAKE SURE THERE IS ENOUGHT OIL It could be the oil pressure sending unit to

Good Evening there are a few different things that can be the culprit. First off it could be the oil pressure sending unit, which is a good possibility or the oil pump. Either way the best way to find out is to go to the local parts store and get a mechanical oil pressure gauge and screw it in where the oil pressure sending unit goes most sensors fail however if working the light will come on below 5 or 7lbs of pressure. That is the best place to start. Hope this helps and remember if you have any other questions please feel free to ask.

Your oil gage is telling you your engine is showing signs of wear / aging. (Possible wear on the main bearings, connecting rod, and camshaft bearings) Your idle may now be lower than it should be. Or your oil sending unit is failing. Or... the oil pump iself is not performing as it once did. Or the Oil pump pick up tube in the oil pan is clogging up. Have you tired a direct pressure reading of the oil pressure? If the direct pressure gage indicates same as your oil light then everything listed above will have to be checked to determine exactly what it is that needs fixing.

Kelly

no,you don't drain oil,depending on which engine you have it is usually beside the oil filter,it just screws in the block.

this is an oil pressure light, most likely the sending unit for the gauge is defective,but I do recommened a shop hook up a oil press test gauge and verify u do't really have low oil pressure, then if that tests ok replace the sending unit on the engine.

check your oil.
get some one to help if needed
try a part store like napa, auto zone or carquest
they will be glad help you
do not drive with out oil.