help please

Bob's answer is a good one! 99.9 % of all electrical problems are caused by bad connections. As for the no heat, you will have two hoses about an inch in diameter going into the fire wall on the passenger's right side under the hood. when engine is warmed up and heater switch is set to hot, then both of these hoses will be hot as well. If one is cold then you may have a blocked heater core. Common on high mileage vehicles. you may be able to disconnect hoses and flush out core. If you smell something sweet inside and passenger carpet is wet, then the core is leaking. You will also get a lot of fogging on inside of windshield. Also check radiator should be very hot to touch when engine is warm. if not, the thermostat may be stuck open. Your temperature gauge should read about in the middle if all is well with thermostat. Hope this helps. Let us know what you find out. Merry Xmas!!!