2002 Santa Fe CDRi - Under hood there are 4 relays basically hung on the battery bracket. Mine is missing cover and previous owner just wrapped them up in electrical tape.

Can anyone tell me what these 4 relays are?

 

Not in any manual I can see. Suspect it must be after market, maybe for tow package?

There are two 30A, one 50A, and one 80A. Seems like alot of power flow for trailer package, no?

 

There are fuses hung onto the battery bracket on mine.
Glow plug, etc.

 

I am not sure but there are some automakers that put fuses on the positive cable near the battery.
The fuses go to the starter, the alternator and the fuse box inside the engine bay
Could be wrong about this ... don't quote me