1994 bonneville blower problem

Hope new bits were used not s/h. if new parts fitted check the multi plug fittings they have a habit of breaking wires in and around the plug a multi meter is helplul and a can of wurth sabesto 2040 penetrant spray a GOD send for all mechanics.

Could be a faulty blower motor or a connection in the wiring.
When it will not work, check the connection at the motor for power and ground.

this isnt the heatercore as it is producing heat and the blower is a fan. the issue could be there is a bad connection to the blower or that the fuse is no longer good.



this site should have what you need:
http://www.books4cars.com/

Did you check the blower fuse ??

Might be the Resistor pack located close to the blower. It has a flat connector with 4 or 5 wires, and two small screws holding in the duct. It may be a crispy critter. It happens... The blower moves air across it to keep it cool. The blower motor may be bad as well, or possibly the fan speed switch. May very well be the fuse for the blower as well. The blower connector may be loose. Let me know what you find.

Fig. 1: The blower motor and fan assembly is mounted in the heater and A/C module, and is accessible from the engine compartment

GM Bonneville/Eighty Eight/LeSabre 1986-1999
Blower Motor - REMOVAL & INSTALLATION
(see Figures 1 and 2)

1. Disconnect the negative battery cable.
2. If necessary, tag and disconnect the number 2, 4 and 6 spark plug wires from the ignition coil and move the coil out of the way.
3. For 1993-99 vehicles, remove the nuts and cross brace bar.
4. Detach the electrical connections from the blower motor.
5. Disconnect the cooling tube from the blower motor.
6. Unfasten the screws securing the blower motor to the blower module assembly.
7. Remove the blower motor and fan assembly from the module.
8. If necessary, unfasten the nut attaching the fan to the blower motor shaft, then pull the fan from the blower motor.

Fig. 2: You can disassemble the fan from the motor by removing the retaining nut


To install:

1. If the fan was removed from the motor, position the fan on the shaft, then install the retaining nut. Tighten the nut to 12 inch lbs. (1.4 Nm).
2. Position the blower motor and fan assembly to the module, then install the retaining screws. Tighten to 5 inch lbs. (0.6 Nm).
3. Connect the cooling tube to the blower motor.
4. Attach the electrical connector to the blower motor.
5. On 1993-98 vehicles, install the cross brace bar and retaining nuts. Tighten the nuts to 18 ft. lbs. (25 Nm).
6. If removed, install the coil and connect the spark plug wires, as tagged during removal.
7. Connect the negative battery cable.

Hope this helped (remember rated and comment this).

sounds like the sensor is becoming questionable or a hi resistance ground in this part of the blower sensor circuit

good possibility your radiator is partially obstructed either internally (calcification blocking core tubes) or externally (leaves etc either in front of a/c condenser or between condenser and radiator). When that happens,(internal) heat transfer is lessened and the fan will work overtime to keep the temperature down. Flushing will sometimes help, but chems used are milder than they used to be and often will go around internal obstructions instead of dissolving them.

its not in the headliner. its under the side panel in the rear on drivers side. you half to remove the panel on the inside just above the rear tire. since the moter runs sometime i would replace the blower motor resistor first cause these are known for going bad and its in the same area as the blower motor. this resistor controls the fan speeds and if its gone bad the fan dont run right. plus its alot cheaper than blower motor. once you have replaced the resistor you can turn the fan on and see if its a fixya before putting the panel back in place.

I would replace the blower motor, this sounds like a motor brush problem inside the motor itself.