Heater blower wont disingage,shouts off when postive cable removed from battery,when replacing positive cable car wont start

check your postive battery cables that model should have 2 cables at the postive with a spacer between them they are famous to corrrode under the red covers requiring the ends to be replaced or the whole of both to be replaced if corrosion has traveled down into the cables

Blower Motor REMOVAL & INSTALLATION Front Fig. 1: Front heater blower motor assembly
Remove the glove box to access the front blower motor, which is on the firewall
The blower motor is retained by four bolts (arrows)
The blower motor vent tube helps to cool the blower motor for efficient operation
Push up on the clip to remove the blower motor connector
A ratchet with extensions makes removal of the retaining screws easier
Lift the blower motor over the control cable . . .
. . . and remove it from the vehicle

1. Disconnect the negative battery cable.
2. Open the glove box door. Gently squeeze the retainers at the rear of the box inward and allow the box to swing downward. NOTE: If additional access is required, unfasten the glove box hinge retainers and remove the assembly.
   
3. Label and disconnect the electrical harness from the blower motor.
4. Remove the blower motor housing tube and/or blower motor cover.
5. Remove the blower motor retaining screws.
6. Remove the blower motor from the A/C evaporator. To install:
   
7. Install the blower motor in the A/C evaporator and tighten the retaining screws securely.
8. Install the blower motor housing tube and/or blower motor cover.
9. Connect the electrical harness to the blower motor.
10. Reinstall the glove box and close its door.
11. Connect the negative battery cable.

Rear Fig. 2: Service cover push pin locations

1. Disconnect the negative battery cable.
2. Remove both rear passenger seats.
3. Remove the three push pin retainers from the lower edge of the auxiliary heater and air conditioning service cover.
4. Lift the service cover outward and upward to remove.
5. Label and disconnect the electrical harness.
6. Remove the blower motor housing tube.
7. Loosen the three retaining screws and remove the blower motor. To install:
   
8. Install the blower motor and tighten retaining screws securely.
9. Install the blower motor housing tube.
10. Connect the electrical harness.
11. Position the service cover and install the three push pin retainers from the lower edge of the cover.
12. Install both rear passenger seats.
13. Connect the negative battery cable.

Behind the glove box. Please see my tip at http://www.fixya.com/cars/r6234839-doesn_t_heater_or_air_conditioner_blow . These are generic instructions. If you get stuck, please get back to me.

See instructions from autozone.com below.

REMOVAL & INSTALLATION

With Air Conditioning
See Figures 1, 2 and 3

1. Disconnect the negative battery cable.
2. Remove the glove compartment door and glove compartment.
3. Disconnect the blower motor wires from the blower motor resistor.

Fig. Fig. 1: Disconnect the blower motor wires from the blower motor resistor-1988 Escort

1. Loosen the instrument panel at the lower right-hand side prior to removing the motor through the glove compartment opening.
2. Remove the blower motor and mounting plate from the evaporator case.
3. Rotate the motor until the mounting plate flat clears the edge of the glove compartment opening and remove the motor.
4. Remove the hub clamp spring from the blower wheel hub. Then remove the blower wheel from the motor shaft.

Fig. Fig. 2: Unbolt the mounting plate from the case

Fig. Fig. 3: The motor can now be removed from the case

To install:

1. If removed, assemble the blower wheel to the motor shaft and install the hub clamp.
2. Install the motor and blower wheel assembly.
3. Secure the instrument panel at the lower right-hand side.
4. Connect the blower motor wires at the blower motor resistor.
5. Install the glove compartment door and the glove compartment.
6. Connect the negative battery cable.
7. Check the system for proper operation.

Without Air Conditioning

1. Disconnect the negative battery cable.
2. Remove the air inlet duct assembly.
3. Remove the hub clamp spring from the blower wheel hub. Pull the blower wheel from the blower motor shaft.
4. Remove the blower motor flange attaching screws located inside the blower housing.
5. Pull the blower motor out from the blower housing (heater case) and disconnect the blower motor wires from the motor.

To install:

1. Connect the wires to the blower motor and position the motor in the blower housing.
2. Install the blower motor attaching screws.
3. Position the blower wheel on the motor shaft and install the hub clamp spring.
4. Install the air inlet duct assembly and the right ventilator assembly.
5. Connect negative battery cable.
6. Check the system for proper operation.

your circuit is simple--I will paste it below. suspect the blower has shorted and caused the switch to burn up. remove the blower and hotwire it to the battery to see if it works. If not, replace the blower. Then run continuity tests on the swoitch and replace switch if bad. If you have questions, please let me know. Here is procedure for taking blower out:

REMOVAL & INSTALLATION With Air Conditioning

1. Disconnect the negative battery cable.
2. Remove the glove compartment door and glove compartment by removing the retaining screws and bolts. Push the sides of the glove box in to free the drawer from dash panel.
3. Loosen the instrument panel at the lower right hand of the glove compartment opening. This is on it necessary if the panel is in the way of the motor housing.
4. Remove the retaining screws securing the ducting around the blower motor.
5. Remove the clip securing the blower motor fan blade to the motor arm. Remove the fan blade from the motor.
6. Remove the blower motor mounting plate from the evaporator case by unscrewing the retaining screws.
7. Rotate the motor until the mounting plate clears the edge of the glove compartment opening and remove the motor.
8. Remove the wire harness from the rear of the motor.
9. Inspect the fan blade for broken edges or cracks. Replace if needed.

To install:

1. Connect the wire harness to the rear of the blower motor.
2. Install the motor into the case and secure with the retaining screws.
3. Position and fasten the fan blade to the blower motor arm. Secure with the clip.
4. Secure the blower motor outer housing to the duct assembly with the retaining screws.
5. Install the instrument panel at the lower right hand side if removed earlier.
6. Install the glove compartment door and glove compartment.
7. Connect the negative battery cable.
8. Run blower motors to make the motor works correctly.
   

Without Air Conditioning

1. Disconnect the negative battery cable.
2. Remove the right ventilator assembly.
3. Remove the hub clamp spring from the blower wheel hub. Pull the blower wheel from the blower motor shaft.
4. Remove the blower motor flange attaching screws located inside the blower housing.
5. Pull the blower motor out from the blower housing (heater case) and disconnect the blower motor wires from the motor.

To install:

1. Connect the wires to the blower motor and position the motor in the blower housing.
2. Install the blower motor attaching screws.
3. Position the blower wheel on the motor shaft and install the hub clamp spring.
4. Install the air inlet duct assembly and the right ventilator assembly.
5. Connect negative battery cab
6. Check the system for proper operation.

Hi!!
Your best bet is to remove the battery or the negative battery cable, charge it and drive your vehicle to an AutoZone, Checkers or similar Autoparts store to have your charging system checked. If the engine is running, even if you disconnect the negative battery cable it should stay running, if it dies, the alternator is not working, probably the voltage regulator. If you just bought the alternator, try to take the vehicle to that place so they can check it. If you don't think the car would make it to the auto parts store. Remove the alternator and the battery to have them tested. It is not unusual that an alternator fails when just out of the box. Good Luck!!
Don't forget to rate this post!!

Check this procedure for models without A/C...

1984 AND LATER

1. Disconnect the negative battery cable, heater blower resistor wires and blower wires. Disconnect the heater core ground strap at the dash panel.
2. Drain the cooling system and then disconnect both heater hoses at the heater.
3. Remove the seven screws attaching the heater/blower case to the plenum and remove the heater/blower base.
4. Remove the four screws from the heater core shroud, and then remove the shroud and core assembly.
5. Separate the core from the shroud by removing the three screws and core mounting clamps and then separating the two.
   

To install:

1. Using sealer as necessary to prevent leaks at all joints and flanges.
2. Position the assembly onto the dash and tighten the retaining screws.
3. Reconnect the heater hoses, electrical connectors and negative battery cable. Refill the engine with coolant, start the vehicle and check for coolant leaks.

And this procedure for all Buick models with A/C...
1977 AND LATER

1. Disconnect the negative battery cable and drain the cooling system.
2. Disconnect the heater hoses.
3. Remove the retaining bracket and the ground strap. Disconnect the module rubber seal and module screen.
4. Remove the right windshield wiper arm.
5. Remove the diaphragm connections, the hi/blower relay, the thermal switch mounting screws, and all the electrical connections from the module top.
6. Remove the module top cover and remove the core.

To install:

1. Apply a strip of caulk-type sealer when installing the module top.
2. Install the core and module top cover.
3. Install the diaphragm connections, the hi/blower relay, the thermal switch mounting screws, and all the electrical connections to the module top.
4. Install the right windshield wiper arm.
5. Install the retaining bracket and the ground strap. Connect the module rubber seal and module screen.
6. Connect the heater hoses.
7. Connect the negative battery cable and refill the cooling system.
8. Start the engine and check for coolant and vacuum leaks.

Hope helps (remember rated this).

Hello! Disconnect the negative battery terminal...Drain the radiator and disconnect the heater inlet and outlet hoses at the dash...Remove the blower inlet to firewall screws...Remove the blower inlet, motor and wheel as an assembly...Disconnect the control wires from the defroster door...
Disconnect the vacuum hose diverter door actuator diaphragm...Disconnect the control cable from the temperature door lever...Remove the four nuts securing the heater assembly to the dash...Remove the screw securing the defroster outlet tab to the heater assembly...Remove the heater from the car...

To install...Make sure the heater assembly seal is in good condition...Position the assembly onto the dash and tighten the retaining screws...Reconnect the heater hoses, electrical connectors and negative battery cable; Refill the engine with coolant, start the vehicle and check for leaks...

Guru................saailer


I’m happy to help further over the phone at https://www.6ya.com/expert/david_6df67de3b14de867

With Air Conditioning

1. Disconnect the negative battery cable.
   
2. Remove the right side scuff plate.
   
3. Pull back the carpet from the passenger's side floor.
   

WARNING Be careful not to cut into the blower motor wiring!

1. Use a suitable utility knife to cut the wheel housing silencer in line with the blower motor wiring.
   
2. Detach the blower motor electrical connector.
   
3. For right-hand drive vehicles, remove the motor cover.
   
4. Unfasten the three blower motor retaining screws, then lower the blower motor assembly from the unit housing.
   

The blower motor assembly is located under the passenger's side dash panel



Blower motor mounting and location of the retaining screws and wiring-vehicles with A/C

To install:

1. Raise the blower motor into position in the unit housing and secure with the three retaining screws.
   
2. If removed, install the motor cover.
   
3. Attach the blower motor electrical connector.
   
4. Use tape to secure the silencer into position.
   
5. Reposition the passenger's side floor carpeting.
   
6. Install the right side scuff plate.
   
7. Connect the negative battery cable.
   

Removal & Installation

Exploded view of the blower motor housing and the heater air plenum assemblies

1. Disconnect the negative battery cable. Allow the engine to cool down. Drain the cooling system to a level below the heater core fittings on the firewall.
   
2. Disconnect the heater hoses from the heater core tubes and plug hoses.
   
3. Remove the five nuts that secure the blower motor housing to the firewall.
   
4. Pull the housing away from the firewall. Disconnect any wire harness plugs which inhibit the housing.
   
5. Remove the remaining nuts which secure the heater air plenum (inside the passenger compartment) to the firewall.
   
6. In the passenger compartment, remove the instrument panel. Refer to Section 10.
   
7. Pull the heater air plenum rearward from the firewall and remove it from the vehicle.
   
8. Remove the heater core from the heater air plenum.
   
9. Inspect all air seals on the components and firewall and replace any that are damaged.
   

1. To install:
2. Install the heater core into the air plenum chamber.
   
3. Position the heater air plenum against the firewall from the passenger compartment.
   
4. Under the hood, install the plenum retaining nuts.
   
5. Install the blower motor housing to the firewall and install the attaching nuts.
   
6. Connect the heater hoses to the heater core tubes at the dash panel in the engine compartment. Do not over-tighten the hose clamps.
   
7. Install the instrument panel.
   
8. Check the coolant level and add coolant as required. Connect the negative battery cable.
   
9. Start the engine and check the system for coolant leaks.
   

There should be a large fuse in the fuse box.It may say main,or start,or something like that.If not there is a fusible link,made like a wire,but will pull apart like taffy.It will be located off the starter(the large cable will be mounted with it)or on a positive junction where a few cables and large wires are.Follow the positive cable until you find the fusible link,and replace it.