Changing the bettery, got the positive/negative cables crossed briefly, now no power steering,power windows, radio, or air conditioning fan. everything else seems ok

Look at your old battery and make note of the brackets installation and the terminal (positive and negative ) locations. Remove the positive cable, then the negative cable where they attach to the battery poles. POSITIVE cables are normally RED.....NEGATIVE cables are normally BLACK. Remove the battery hold down bracket making sure you do not place anything metal across the two battery poles. Install the new battery into the battery tray, attach the hold down brackets, the attach the negative cable end then the positive end. BE VERY CAREFUL and DO NOT GET BATTERY ACID on you or SHORT ACROSS the battery poles with any metalic object. If you have not done this before and are buying a new battery from an auto center....they will...most times.....install the battery for you free of charge

Here is the procedure from Autozone.com. Judge for yourself if you can do it. We'll be here if you get stuck. :-)

Ignition Switch

Fig. Removing the contact reel from steering column
Removing the contact reel from steering column

Remove the ignition switch:

1. Disconnect the electrical connector.
2. Remove the screws.
3. Remove the ignition switch.
   
   
   Fig. Ignition switch removal
   Ignition switch removal

To install:

1. Install the ignition switch:
   1. Position the ignition switch and tighten the screws.
   2. Connect the electrical connector.
2. Install the contact reel. Tighten the M5 screws to 44 inch lbs. (5 Nm).
3. Install the upper and lower steering column covers. Tighten the screws.
4. Install the air bag and steering wheel. Refer to Steering Wheel removal and installation.
5. Connect the negative battery cable.

NOTE Make a note of the anti-theft radio code

1. Remove or disconnect the following:
   
   Engine splash guards, if equipped Negative battery cable Drive belt Power steering pump Mounting bracket Connector and wiring Upper mounting screw Upper screws for the air conditioning (A/C) compressor. Move the screws approximately 30 mm forward. Lower screws for the air conditioning (A/C) compressor Alternator
   

Fig. Typical alternator mounting


To install:
Install or connect the following:


Alternator Upper bolt. Do not tighten Mounting bracket Two bolts for the air conditioning compressor Tighten bolts to 18 ft. lbs. (25 Nm) Connector and wiring Power steering pump Drive belt Negative battery cable Engine splash guards, if equipped

Removal & Installation

1. Before servicing the vehicle, refer to the Precautions Section.
   

2. Disconnect the negative battery cable
   

3. Properly relieve the fuel system pressure.
   

4. Remove the alternator drive belt.
   

5. Remove the fresh air duct from the top of the radiator.
   

6. Remove the upper radiator hose.
   

7. Remove the 4 attaching nuts to the clutch fan.
   

8. Remove the 5 fan shroud bolts. Remove the fan and shroud as an assembly.
   

9. Remove the 4 splash guard mounting bolts and the splash guard.
   

10. Loosen the lock bolts and loosen the air conditioning drive belt.
    

11. Loosen the power steering lock and mounting bolt. Remove the power steering belt.
    

12. Remove the six crankshaft pulley mounting bolts and remove the pulley.
    

To install: reverse above

Instructions Things You'll Need:

• Replacement heater core
• Clean container
• Wrench
• Screwdriver
• Steering wheel nut

Removal

1. Disconnect the negative battery cable and wait at least one minute for the air bag system to lose power. Make sure the front wheels are straight ahead and lock the steering column.
   

2. Detach the air bag module by removing the bolts from underneath both sides of the steering wheel and the electrical connector. Remove the steering wheel bolt and press the wheel away from the steering column. Remove the lower steering column cover.
   

3. Insert a 1/8-inch wire or pin punch in the shroud hole under the ignition switch while it's in the "Run" position. Press on the pin and pull on the ignition switch lock cylinder to remove it.
   

4. Disassemble and remove the instrument panel from the Taurus' interior. This includes the radio and all panels, electrical connectors, harnesses and screws. You'll need an assistant to help you lift and remove the instrument panel.
   

5. Drain the engine coolant from the cooling system, using a clean container for reuse. Remove the heater hoses, actuator and metal cover from the heater. Disengage the spring from the heater core cover and the lever.
   

6. Depress the locking ramp and remove the lever from the secondary air temperature control (the lever is brittle, so don't bend it). Remove the primary air conditioning air temperature control door shaft from the pin.
   

7. Remove the heater core cover and seal from the heater/air conditioning housing assembly. Remove the heater core from the heater/air conditioning housing by pressing on the core tubes and assembly.
   

Installation

8. Install the replacement heater core to the heater/air conditioning housing. Install the core cover, seal, lever, spring, metal cover, actuator and heater hoses.
   

9. Replace and assemble the instrument panel with your assistant's help. Connect the steering wheel (use a new bolt to connect it to the column), air bag and negative battery cable.
   

10. Refill the cooling system with either the old coolant or new. Start the Taurus' engine and let it reach normal operating temperature. Watch the climate control operation and check for any leaks.
    

Read more: How to Replace the Heater Core in a Ford Taurus ' eHow.com http://www.ehow.com/how_4521301_replace-heater-core-ford-taurus.html#ixzz132BljfG8

This problem is caused by the BCM, this is the "body control module" u will need the dealer to scan the module and run an active test on it to see if it responds, u can also try disconnecting the NEFATIVE battery cable for 3 minutes, this may restore function

REMOVAL & INSTALLATION
2.2L Engines
CHRYSLER ALTERNATOR

1. Disconnect the negative battery cable.
2. Label and disconnect the wiring (for easy installation).
3. Remove the air conditioning compressor drive belt, if equipped.
4. Loosen the alternator adjusting bracket bolt and adjusting bolt. Remove the alternator belt.
5. Remove the bracket and mounting bolts.
6. Remove the pivot bolt and nut.
7. Lift the alternator from the vehicle.
   

When lifting the alternator out of the vehicle on some years with A/C, clearance may be restricted by the condenser cooling fan assembly or the A/C compressor and mounting bracket assembly, if so, removal of one of these items will be necessary.

To install:

1. Position the alternator against the engine.
2. Install the pivot bolt and nut.
3. Install the mounting bracket bolts, and adjusting bolt.
4. Install drive belts and adjust to specification.
5. Tighten all the mounting bolts and nuts.
6. Connect all alternator terminals.
7. Connect the negative battery cable.

BOSCH ALTERNATOR

1. Disconnect the negative battery cable.
2. Disconnect the wiring and label for easy installation.
3. Remove the air conditioning compressor drive belt.
4. Loosen the alternator adjusting bracket locknut and adjusting screw. Remove the alternator belt.
5. Remove the bracket locknut and mounting bolt.
6. Remove the pivot bolt and nut.
7. Remove the alternator from the engine.

To install:

1. Position the alternator against the engine.
2. Install pivot bolt and nut.
3. Set the mounting bracket in place and install the bracket mounting bolt and locknut.
4. Install the drive belts and adjust to specification.
5. Tighten all the mounting bolts and nuts.
6. Connect all alternator terminals.
7. Connect the negative battery cable.

2.5L Engines
2.5L engines were equipped with either Chrysler or Bosch alternators.

1. Disconnect the negative battery cable.
2. Remove the drive belts.
3. Remove the adjusting bracket-to-engine mounting bolt.
4. Remove the adjusting locking bolt and nut, then remove the mounting bracket.
5. Position the alternator to gain access to the wiring.
6. Disconnect the wiring and label for easy installation.
7. Remove the pivot bolt, nut, and washers.
8. Remove the alternator assembly from the engine.
   

To install:

1. Position the alternator assembly against the engine.
2. Loosely install the pivot bolt, washers, and nut.
3. Attach all wiring connectors to the alternator.
4. Position the mounting bracket in place, then install engine mounting bolt.
5. Loosely install the adjusting locking bolt and nut.
6. Install the drive belts, and adjust to specification.
7. Tighten all mounting bolts and nuts.
8. Connect the negative battery cable.
   

2.6L Engines
2.6L engines were equipped with Mitsubishi alternators.

1. Disconnect the negative battery cable.
2. Disconnect the wiring and label for easy installation.
3. Remove the adjusting strap mounting bolt.
4. Remove the drive belts.
5. Remove the support mounting bolt and nut.
6. Remove the alternator assembly.

To install:

1. Position the alternator assembly against the engine, then install the support bolt.
2. Install the adjusting strap mounting bolt.
3. Install the alternator belts and adjust to specification.
4. Tighten all the support bolts and nuts.
5. Connect all of the wiring terminals to the alternator.
6. Connect the negative battery cable.

3.0L Engines
The 3.0L engines were equipped with either the Nippondenso or Bosch alternators.

1. Disconnect the negative battery cable.
2. Install a 1 / 2 in. breaker bar in the tensioner slot. Rotate counterclockwise to release belt tension and remove poly-V belt.
3. Remove the alternator mounting bolts (2).
4. Remove the wiring and remove alternator.
   

To install:

1. Position the alternator onto the engine, then install the wiring.
2. Set the alternator against the mounting bracket and install the mounting bolts.
3. Rotate the tensioner counterclockwise and install poly-V belt.
4. Connect the negative battery cable.
   

3.3L and 3.8L Engines
The 3.3L and 3.8L engines were equipped with the Nippondenso alternators.

1. Disconnect the negative battery cable.
2. Remove the alternator drive belt, by relieving the tension on the dynamic tensioner.
3. Loosen the nut on the support bracket at the exhaust manifold, do not remove it.
4. Remove the alternator tensioner/power steering bracket bolt.
5. Remove the tensioner stud nut and remove the tensioner.
6. Remove the alternator mounting bolts.
7. Remove the power steering reservoir from the mounting bracket, do not disconnect the hoses, and position it out of the way.
8. Remove the alternator support bracket bolts. Remove the intake plenum to alternator bracket bolt and remove the alternator support bracket from the engine.
9. Remove the alternator from the engine and disconnect the electrical leads.
   

To install:

1. Install the alternator in position on the engine and connect the electrical leads.
2. Install the alternator support bracket, tighten the retaining bolts to 40 ft. lbs. (54 Nm).
3. Install the power steering reservoir on the mounting bracket.
4. Install the alternator mounting bolts, tighten the bolts to 40 ft. lbs. (54 Nm).
5. Install the tensioner and tensioner mounting stud. Install the retaining nut on the exhaust manifold.
6. Install the alternator belt, insert a 1 / 2 in. extension into the square hole in the tensioner and turn the tensioner. Tighten the tensioner bolt.
7. Connect the negative battery cable.

Hope this help (remember comment and rated this).

1. Disconnect the negative battery cable.
   
2. If necessary, remove the air cleaner duct and the air cleaner.
   
3. Remove the drive belt from the air conditioning compressor, if equipped.
   
4. Loosen power steering pump belt adjustment as follows:
   
   1. Loosen the pivot and mounting bolts.
      
   2. Loosen the idler pulley locknut and turn the adjusting nut counterclockwise to remove the power steering belt.
      
5. Loosen the power steering hoses at the pump and remove the bolts holding the power steering pump to the bracket.
   
6. Disconnect and plug the power steering hoses and remove the pump from the vehicle.
   

To install:

1. Using new O-rings, connect the power steering hoses to the steering pump.
   
2. Install the power steering pump and secure it with its mounting bolts. Tighten the front and rear mounting bolts to specifications.
   
3. Install the remaining components in the reverse order from which they were removed.
   
4. Connect the negative battery cable.
   
5. Fill the power steering system, start the engine and turn the steering wheel from side-to-side to bleed air from system
   

Crankshaft Balancer: Service and Repair
REMOVAL PROCEDURE
1. Disconnect the negative battery cable.
2. Release the accessory drive belt tensioner (3).
3. Remove the drive belt (5) from the engine.
4. Remove the power steering gear from the vehicle.
5. Remove the starter motor.
6. Remove the power steering cooler bolts from the front crossmember.
7. Remove the power steering cooler from the front crossmember and reposition.
8. Release the air conditioning (A/C) belt tensioner (10).
9. Remove the A/C drive belt (1) from the engine.
10. Remove the crankshaft balancer.
INSTALLATION PROCEDURE
1. Install the crankshaft balancer.
2. Install the A/C drive belt (1) to the engine.
3. Install the power steering gear.
4. Install the power steering cooler to the front crossmember.
5. Install the power steering cooler bolts.
^ Tighten the power steering bolts to 11 Nm (97 inch lbs.)
6. Install the starter motor.
7. Lower the vehicle.
8. Install the accessory drive belt (5) to the engine.
9. Connect the negative battery cable.
^ Tighten the negative battery cable bolt to 15 Nm (11 ft. lbs.).
10. Program the Transmitters.