How can I check the battery relay on my 2002 HD Dyna Low Rider?

SOURCE: 93 Dyna low rider fork oil.

your local hd shop should be able to answer this for you as its a mesured amount and to much or too little will make the bike not handle right

SOURCE: Add transmission fluid to 2001 Harley dyna low rider

the tranny plug is behind the oil spout its usually a big allen head bolt. You should use a quality oil like AMSOIL 20W50 motorcycle oil or AMSOIL gear oil. I have the 20W50 in mine and really like the benifit of not having a pultrolium product in my bike. You can get the AMSOIL online a http://hbsynlube.com/sales. You'll beglad you changed it.

SOURCE: how do you remove battery from dyna low rider

I have an early model and I think they're still the same in that area. There are two bolts on the right side of the battery support. Loosen these two bolts and the battery will drop down a bit allowing you to remove the battery top cover and front cover.

SOURCE: What is the fork oil capacity for a 2004 Dyna Low

If I am not mistaken. You will need ten ounces per side ounce you have completely drained them

SOURCE: 2002 HD Dyna Super Glide front brake noise at low

If it sounds like "swish-swish" noise, that is nornal for your bike. HD changed the front brakes in the 90's and the result was better stopping performance but there is that darned swishing sound. Don't worry about it, mate, there's nothing wrong with your bike.

Now, if you start to hear squealing when you pull the lever, take the bike to a shop to have the brakes pads replaced. If you feel vibration when you apply the brakes, take it to a shop immediately and have them check the wheel spokes for tightness.