Just bought a 90 jeep cherokee for 500 bucks put starter relay and starter and now it runs but the heater doesnt work. I checked the blower motor and it works have it hooked to a toggle switch so i can defrost windshield. Need to figure out where blower motor relay is so i can replace it. Check the blower motor resistor and it is good as well as the fan speed switch(good part bout working at part store lol) This whole thing is pissing me of i can find it anywhere and cant find any help anywhere either.

 

behind the glove box area

 

is there juice to the dash switch its very common for the plugs to them melting and not makeing contact