Dose anyone know where the heater fuse is located, cause my heater isn't shutting off even when i push the switch to off

 

Why not just pull a few till it goes off. Should be located behind the drivers side kick panel.

 

ok i found it thanks

I have one more question, when it is on it only works on kinda high and high dont really know why??

 

The resistor bundle is failing. It's located on the blower housing.
http://www.4crawler.com/4x4/CheapTricks/Blower.shtml

 

right I lost my heater low as well, that's the blower motor resistor. Not sure why it stays on all the time though. Might be the resistor is shorting itself out as well?

 

That would probably be the switch itself, shouldn't be any power at the resistor when the switch is off. Quick fix though, on both accounts.

Might I recommend avoiding Airtex Wells heater switches at all costs? Cheap plastic innards failed after <2 months on mine. Buy OEM one at a junkyard, much better off.