Heater no blowing hot?

Jessie, it sounds like you have a completely plugged heater core. Does your vehicle have a valve on the heater core supply hose? If so, does the valve move?

Check thermostat if its stuck open, heater core if its clogged and the air blend door if its stuck in the cold position

No weak water pump. Most likely your heater core is restricted due to crud built up in it. Try removing the hoses from your heater core and blow out the heater core. I usually fill the heater core with water and blast compressed air through it. I put a rag at outlet and observe all the crud that comes out. This usually fixes this problem. Remember feedback and votes are appreciated if I have helped you

You probably have air trapped in the heater core. That's why we usually use vacuum to fill the cooling system.

It should work out on it's own.
With the engine at full operating temp, locate the 2 heater hoses where they go into the firewall and feel them to see if they are both hot to the touch.
If you find that they are both too hot to hold, then the heat in that vehicle is controlled by a blend door that regulates heated air flow. It is operated by an electric motor/actuator. The problem can be that the actuator is stripped or inoperative or the door itself could be damaged. This is what needs to be determined by examining the actuator and see if it is responding to heat change commands or not.
If they are both not too hot to hold on to, then you either have a restricted heater core or the system is not completely full and getting air pockets for some reason.

Check and adjust coolant level
try to flush heater core

When you say direct to battery are you supplying it with power and ground or just power
if just power you should be able to control the speed from the switch and in this case I would suspect a bad fuse ,wire and or relay
let me know

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need manual CHECK IT @
https://www.2carpros.com/kpages/auto_repair_manuals.htm

What happen if you supply power only or ground only
let me know

Are both the hoses going into the heater core hot to the touch? If both are then check the blend door. If one or none is id bleed the coolant sensor