disconnect you're battery first ,remove glove box. locate your blower motor and disconnect your wiring harness from it ,next remove the computer on the right side of the blower box. ,then remove the three screws and one 10mm nut and pull the entire blower assembly out. there is a hidden screw up top behind a piece of duct work. next remove the eight Phillips head screws to remove the cover on the heater box. now you will be able to pull out the evaporator core if you have disconnected the ac line from under the hood where it goes thru the fire wall.
Answering "How do you replace the water pump on a 1994 Toyota Camry?"
Check near the tires.
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The egr valve is located on the top rear of the engine. It bolts on and is easily removed.
It meters liquid high pressure refrigerant into the evaporator which is located in the heater housing under the dash. It controls refrigerant flow to keep the evaporator coil from icing up.
The expansion valve is located inside the evaporator core housing on the evaporator core. If you see the large and small pipes coming through the firewall on the passenger side of the engine compartment and trace them into the plastic box behind the glove box, you will find the evaporator core inside this box and the expansion valve is the little aluminum block that is in between those pipes and the evaporator core. It should have a little quarter- like bell on the rear of it. Hope this helps and is in time.
Where is the A/C expansion valve on the 1994 Lexus Es300
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Try this link: http://wiki.answers.com/Q/How_do_you_replace_the_headlight_bulb_located_on_a_1994_Toyota_Camry
Replace it with a know good one, if that fixes your problem then its the igniter.
Nevermind, I found it. In case someone else needs to know, the expansion valve is located behind the engine and bolts right to the firewall. There are 2 lines going into it that have to be unbolted, and 2 bolts holding the valve to the firewall.
It has a timing belt. Replace every 60,000 miles.