Replaced fuel pump. Now A/C is locked. Indicates 'service ac system'. What's wrong?

does it have the immobilzer options, and matching dash lamp.?
if yes try the 2nd key, car came with day1 new.?
the lamp is Icon "THEFT" GLOWS WRONG.
SecuriLock (tm) anti-theft system !
WHEN DID IT LAST RUN GREAT? NEVER SEEN IT?

which engine, has bad spark.<<< scan obd2 port yet? cranking it.?
4.6 L Triton V8
5.4 L Triton V8
8 COP coils all have spark.?
no 24 year old cop Boots or spark plugs.right?
CKP and new CMP not dead.


USER GUIDE PAGE 9

This light indicates the anti-theft alarm system is armed. Momentarily illuminates when the ignition is turned to ON/START. If the light fails to illuminate, continues to flash or remains on, have the system serviced.
THE SCAN TOOL TELLS YOU WHY, DTC ERRORS

may be the fuel supply system have some complaint.try to check it.also try to check the ignition system

I know that you do not want to hear this, but when you have an electrical issue as this it takes some major tracing the wiring circuit and I have found stay away from a shade tree type mechanic go to a electrical shop. Good Luck Mike

Take it to a qualified repair shop . Would need to hook up a factory scan tool or a professional one , check DTC'S - diagnostic trouble codes instrument cluster , an HVAC - heating & A/C control module . Why did you replace the fuel pump module ? Did you replace the fuel level sending unit ? You should not mess with thing's you have no clue about .

The best solution you'll get from books at www.reliable-store.com

These are books containing info on repair, service, troubleshooting, parts info, assembling dissemble, removal, error/fault codes, wiring diagrams and everything on any vehicles cars, atv, trucks. forklifts, boats, excavators etc

Possible anti theft but I think that you have a blown fuse go to ford owners manual.com and register for free then download the manual then go to roadside emergencies and your fuse box diagrams and values for ignition and fuel pump as well as others //// when you put the key in does the pats system light start to rapidly flash or does it go out while cranking if rapidly the anti theft is activated or somehow your key was erased check PCM fuse ignition fuel pump coils injectors

SPECIAL SERVICE TOOL(S) REQUIRED Description Tool Number Multi-Port Fuel Injection (MFI) Fuel Pressure Gauge T80L-9974-B
Removal

1. Depressurize fuel system as outlined in Service Procedures- Fuel System Pressure Relief.
   

1. Remove rear seat cushion. Refer to Section 01-10.
   

1. Remove plastic grommet from floor pan.
   

1. Disconnect fuel pump module electrical connector.
   

1. NOTE: To disconnect fuel tubes from fuel pump module, compress tabs on both sides of each nylon push connect fitting and ease fuel tube out of fuel pump module.
   
   Disconnect fuel and vapor return tubes from fuel pump module.
   

1. Turn fuel pump locking retainer ring counterclockwise using Fuel Tank Sender Wrench D84P-9275-A or equivalent and remove fuel pump locking retainer ring.
   

1. NOTE: After fuel pump module removal, immediately cover fuel pump module opening in fuel tank in order to prevent fuel system contamination.
   
   Remove fuel pump module and cover fuel pump module opening in fuel tank.
   

1. Remove fuel pump module O-ring seal and discard.
   

Installation

1. NOTE: When cleaning fuel pump module mounting surface on fuel tank, use caution to prevent any foreign material from entering fuel system.
   
   Clean fuel pump module mounting flange and fuel pump module mounting surface and O-ring seal groove on fuel tank.
   

1. Apply a light coat of Premium Long-Life Grease XG-1-C, -K or equivalent meeting Ford specification ESA-M1C75-B on a new O-ring seal to hold it in place and install it into the O-ring seal groove on the fuel tank.
   

1. Install fuel pump module carefully to ensure that filter is not damaged. Make sure that locating keys are in keyways and O-ring seal remains in place.
   

1. Hold fuel pump module in place and install fuel pump locking retainer ring finger-tight. Make sure that all locking tabs are under fuel tank lock ring tabs.
   

1. Secure fuel pump locking retainer ring by rotating clockwise using Fuel Tank Sender Wrench D84P-9275-A or equivalent until fuel pump locking retainer ring rests against stops.
   

1. Connect fuel and vapor return tubes to fuel pump module.
   

1. Connect fuel pump module electrical connector.
   

1. Install plastic grommet in floor pan.
   

1. Install rear seat cushion. Refer to Section 01-10.
   

1. Install Multi-Port Fuel Injection (MFI) Fuel Pressure Gauge T80L-9974-B as outlined in Service Procedures-Fuel System Pressure Relief.
   

1. Turn ignition switch to RUN position for three seconds repeatedly (5 to 10 times) until pressure gauge reads at least 270 kPa (30 psi). Check for leaks at fittings.
   

1. Remove pressure gauge, start engine and recheck for leaks.
   

Hope this helps

Yes the tank must be removed

Fuel Pump: Service and Repair
WARNING: The fuel system is under constant pressure, even when the engine is OFF. Always release fuel pressure before servicing any fuel
system component.
FUEL PUMP REMOVAL
1. Release fuel system pressure.
2. Fuel tank must be removed prior to fuel pump service.
3. Using a hammer and a brass drift, carefully tap the fuel pump lock-ring counter-clockwise to release the fuel pump.
4. Remove the fuel pump and its O-ring from the fuel tank, and discard the old O-ring.
5. Cover tank openings to prevent dirt from entering system.
FUEL GAUGE SENDING UNIT REMOVAL
1. Gently bend the sending unit locking tabs away from the sending unit.
2. Remove the electrical connector cover (red). Remove the sending unit wires from the electrical connector.
3. Use one screwdriver to push on the fuel pump body, and use another to release the sending unit locking tab from the sending unit.
4. Slide the sending unit assembly off of the fuel pump reservoir housing.
5. Pull the wires through the reservoir body and fuel pump cover plate.
FUEL GAUGE SENDING UNIT INSTALLATION
1. Bend the sending unit wires and lay them into the slot on the back of the sending unit.
2. Slide the sending unit into the slots on the fuel pump reservoir body. Slide the wires through the triangle shaped hole in the fuel pump reservoir
body. Check that the tab in the fuel sending unit locks into the detent in the fuel pump reservoir body.
3. Slip the wires onto the tab of the fuel pump reservoir body.
4. Slide the sending unit wire terminals into the electrical connector. Install the terminal locking cover.
5. Slide the fuel sending unit electrical connector into the bottom of the fuel pump electrical connector. Check that the connectors are securely
attached and fully pushed into each other.
FUEL PUMP INSTALLATION
1. Wipe seal area of tank clean, and install a new O-ring seal on pump.
2. Position fuel pump module in tank and secure with the lock-ring.
3. Using a hammer and a brass drift, carefully tap the fuel pump lock-ring clockwise to lock the module in place.
NOTE: Do not overtighten the lock-ring, because the fuel pump seal could split and leak.
4. Install fuel tank assembly.
NOTE: ASD and fuel pump relays remain energized for 7 minutes during the following test, unless the test is stopped or the ignition switch is
turned to the OFF position.
5. Using scan tool, place ignition switch in "RUN" position and use Actuate Output Test "Auto Shutdown (ASD) Relay", to activate fuel pump and
pressurize system.
6. Check for leaks.

u need to look at ac compressor and have some one give it some rpmS inside the car(push the accererator down a bit) and see if the clutch locks up ,belt smoking> if so replace ac system

I suspect this is what is wrong.... (see picture) the sock has caught onto the bafflle inside the tank....