New Guy

[rosspaul]

Hey guy's I am new here I thought you all might be able to help me .
I have 2002 liberty no heat all is good under the hood I thought it is the blend air doors.2nd the speedo is not working I changed the sensor on the rear dif and put on a new plug for it any her would be great Thanks

 

[Porkchop]

Possible heater core what coolant does it have in it. Follow the wiring and check the old side of the plug the side not replaced.