I cannot locate my low pressure switch on 1995 Corsica.
Receiver/Dryer located behind right headlight assembly. There is not a switch located there but I do have a pigtail hanging there(2 wires) Headlight assembly was broken and had to change it out when I bought the car. I put manifold guages on system and I do have pressure. If I ground the wire coming from the compressor relay the compressor kicks in and if I ground the wire coming from the fan relay it will run, but they will not work from the HVAC control inside. I have never seen an A/C system without a low pressure switch. Does anyone know where it is located on this car?
Re: I cannot locate my low pressure switch on 1995...
First of all, from the discharge port of compressor to the condenser(the device in front of the radiator) from the condenser to the metering device is all the high side or high pressure. From the metering device through the evaporator including accessories back to intake of compressor is the low side or low pressure.It is important to know that entrained in the refrigerant is oil for lubrication. The combination of pressure and oil could be a safety and environmental hazzard. I know on older GM models one could short out low pressure switch by jumping the low pressure switch with appropriate gage wire. This would temporarily permit one to add aditional refrigerant to system.The job of the low pressure switch is to protect the compressor from burning up due to lack of refrigerant by shutting the system down.. Now, if the refrigerant is low it had to escape, meaning a leak.(refirerants don't just wear out)Refrigerants are notorious to being determental to the environment. Older refrigerants contained hydrocarbons that destroyed or reduced the ozone levels to reduce this from happening strict laws of handling and recovering a/c refrigerants were enacted & exhorbitant costs were placed on the offending refrigerants.In order to save some some money some untrained or knowledgeable people are continuing attempting to repair their systems risking injury like permanent eye injury.Is it worth it? No one (I believe ) intentionally desires to be hurt.However, by attempting to do something that you haven't been trained on can make you more susceptable to injury or accident. An in a instan one could trade off perfect vision to partial or even total blindness.This is not to just to scare you but gives you an opportunity to weigh all the decisions prior to attempting something one might be unfamiliar with.Most of the accidents I've witnessed at home and work were individuals taking short cuts,hurrying or attempting something unfamiliar with.Not all accidents fall into this category but be aware rehab is no fun and often not totally complete. Lets not compromise your safety and the well being of our environment.
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Turn the headlight switch on and inspect the headlights. Make sure to check both low- and high-beam lights, and then note the position of the bulb in the headlight assembly. Low-beams are in the top cavity of the assembly and high-beams are in the lower cavity.
2Turn off the headlight switch and then remove the keys from the ignition.
Open the hood and locate the seam to the headlight assembly and the side fender. Locate the headlight assembly release lever and push in on it slightly to unlock it and then pull it all the way up until it stops.
4Place a blanket or pillow on the ground in front of the headlight assembly. Push the assembly outward from behind with one hand while being ready to catch the assembly with the other. The New Beetles use an adhesive sealant to protect the back of the headlights from exposure to moisture, so you'll have to give the assembly a push from behind.
5Pull the wire harness plugs off from both the high- and low-beam blades of the respective bulbs.
6Place the assembly on the blanket or pillow. Release the wire clip to the faulty headlight and then remove the headlight bulb.
7Open the package of the new H1 bulb replacement without touching the glass portion of the bulb with your bare skin. Oils in human skin will damage the bulb. Handle it only by the metal base of the bulb insert.
8Insert the new bulb in the appropriate headlight-assembly cavity and reattach the bulb retaining clip to lock the bulb in place.
9Lift the assembly up and plug the wire harness plugs back into the respective blades of the bulbs.
10Push the headlight assembly into its cavity, but before locking it in place, check the lights by turning on the headlight switch.
Step 1: Be sure the ignition key is not in the ignition, and the headlight switch is in the "Off" position.
Locate and remove the two headlight assembly screws on the top rail of
the headlight assembly. Use the nut driver to remove them.
Place a rag between the headlight
assembly and the bumper to protect the paint.
Wrangle the assembly outward. There is a guide pin behind the assembly
on the fender side that holds it in place. This needs to be popped out
of its socket in order to remove the headlight assembly. Pull slightly
outward from the side, then forward and away from the car.
Step 5: Locate the correct bulb socket (high-beam/low-beam). Disconnect the wire connector using the flathead screwdriver.
Step 6: Turn the socket 1/4-turn counterclockwise to remove the socket from the headlight assembly. Remove the old bulb.
Insert the new bulb into the headlight assembly, and turn clockwise to
lock into place. Be careful not to touch the glass bulb of the new
socket. This could degrade headlight performance.
Reconnect the wire connector to the bulb. Test the light before
replacing the headlight assembly, then turn off the lights again.
Reinsert the headlight assembly, making sure to align the guide pin
into the socket. Replace the screws and tighten.
it's easier to change the light bulbs in this car than in a lot of other vehicles. The 2008 pontiac Grand Prix uses separate bulbs for low beams and high beams. The low beams are located on the outer edge of the headlight assemblies while the high beams are located on the inner edge of the assemblies. To replace the low beam of the headlight bulb You will be in need of these instruments(Soft blanket or towel, Latex gloves, 9006 replacement headlight (low beam)), please follow the steps below:
Open the hood to the 2008 Pontiac Grand Prix after making sure the headlight switch is in the off position, and the keys are not in the ignition.
Approach the headlight assembly with the spent headlight in it, and locate the retaining bracket (white) holding the assembly to the frame rail of the Grand Prix.
Lift the retaining bracket up about a quarter of an inch in order to align the notches of the bracket to the riveted tabs on the frame.
Pull the assembly forward away from the front of the car starting with the inner corner of the assembly toward the grill. Keep in mind the wire harness connection is still attached to the assembly, so only pull it far enough to reach behind and disconnect the plug located at the bottom of the assembly.
Place the headlight and bulbs assembly lens down onto a soft towel or blanket.
Disconnect the respective low beam or high beam wire harness.
Turn the plastic base of the headlight counterclockwise a quarter turn to align the retaining tabs with the release notches. Remove the headlight from the headlight assembly.
Put on latex gloves before handling the replacement low beam or high beam headlight. Oil from skin will compromise the life of the headlights if it contacts the glass bulb.
Insert the new bulb into the assembly by aligning the retaining notches to the release tabs, and then turn the base of the headlight 1/4 clockwise to lock it into the headlight assembly. Reconnect the harness to the headlight.
Bring the assembly back to the Grand Prix and reconnect the main wire harness at the bottom of the assembly.
Align the guide pins at the back of the assembly to the locating holes in the front frame rail starting with the outer guide pin first and the inner (toward the grill) guide pin last. Lift the assembly upward while pushing back on the lens to push down on the retaining bracket.
Place the key in the ignition and turn the key to accessory power.
Ok this may sound like the switch is faulty BUT.. the sunfires were built in mexico and they did not count on the weather we have..The headlights have splices in the conduit between the headlamps and some are located behind the headlamp assemblies themselves. the splices are wraped in what looks like black duct tape and are bad for rotting. Cure is remove the tape clean or cut the wires and properly solder and heat shrink the connections. Gm had a product service bulliten for this cond, years ago for all Canadian dealerships to look for this...good luck
The adjustment screws/nuts should be located either on the top of the headlamp assembly,
behind the headlamp assembly, or near the frame rail by the radiator
You will have vertical adjustment screws for each independent beam
(separate highs and separate lows, but will be same screw if highs and
lows are the same bulb). You may also have additional horizontal
adjustment screws as well
your car on a level ground 30 feet from a wall and measure the height
from the ground to the bulb and mark on a wall (do this for highs beams
and low beams if the bulbs are separate, if highs and lows are the same
bulb, only do it for the lows)
For Low Beams: If the headlights read VOR, then
aim the brightest part or cutoff part just below the mark on the wall.
If it says VOL or nothing, aim them 2 inches below the mark on the wall.
For High Beams (if separate from low beams): Aim the headlight directly at the line you marked on the wall.
Service Gauge Port Valves
The high-pressure service gauge port valve is located on the A/C receiver drier manifold and tube assembly.
The low pressure service gauge port valve is located on the manifold of the A/C compressor manifold and tube assembly at the A/C compressor.
A/C evaporator core
Thermostatic expansion valve
Manifold and tube assembly—thermostatic expansion valve
Manifold and tube assembly—A/C compressor
A/C charge port valve (low side)
A/C pressure relief valve
A/C pressure transducer
A/C condenser core
A/C charge port valve (high side)
Manifold and tube assembly—receiver drier
Sensor—evaporator air discharge temperature