no heat

[71dang]

i have a 98 grand prix heater only worked on 4 and 5 then nothing, i replaced blower motor, but still no heat was told that its probably resistor have searched for any kind of instrution on removal, only thing i can find is a mention of the resistor. im not even sure what it looks like. i guess when i buy the part i'll knowthen. Any suggestions or help will be greatly appreciated winter almost here.

[toolguy]

This car has a control module too and a resistor. The fan should come on at the highest speed. High speed is the defgault setting, since it is a full 12 volts to the motor. It does this as a safety for the driver, so there is some kinf fan speed, so you can drive. Does your blower come on in the high setting?


Blower Motor Resistor Replacement

<A href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=405162&psdid=133&evc=sm#ss1-405162">Removal Procedure

1. <LI type=1>Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical. <LI type=1>Remove the right side instrument panel insulator. Refer to Insulator Replacement - Instrument Panel (I/P) in Instrument Panel, Gauges and Console.
   
   
   <LI type=1>Disconnect the electrical connectors from the blower motor resistor.
   
   
   <LI type=1>Disconnect the blower motor resistor electrical connector from the blower motor.
   
   
   <LI type=1>Loosen, do not remove, both forward screws. The blower motor resistor opening is slotted as access is extremely limited. <LI type=1>Remove the rearward screw.
2. Remove the blower motor resistor.

Blower Control Module Replacement

<A href="http://127.0.0.1:9001/servlets/BlobShtml?ShtmlFile=405927&evc=sm&pubid=133&cellId =48837&mspsdsubkey=746#ss1-405927">Removal Procedure

1. <LI type=1>Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure in Engine Electrical. <LI type=1>Remove the right instrument panel insulator. Refer to Insulator Replacement - Instrument Panel (I/P) .
   
   
   <LI type=1>Disconnect the electrical connector to the blower motor control module.
   
   
   <LI type=1>Disconnect the blower motor control module electrical connector from the blower motor.
   
   
   
   Important
   
   The opening to the blower motor control module is slotted. Access to the blower motor control module opening is limited.
   
   <LI type=1>Loosen both of the blower motor control module forward screws. <LI type=1>Remove the blower motor control module rearward screw.
   Important
   
   Tilt down the rear of the blower motor control module.
   
2. Remove the blower control module.

[Liquifire]

also, is your passenger floor ever wet after it rains? If so, I probably can guess why the blower motor may need replacing and there is an easy cheap fix to this problem. If this is happening let me know, and I will get you the info you need.

[71dang]

no there is nothing at all and yes every time we have steady rain floor is soaked

[Liquifire]

to sum it up the grand prix's did not come with a piece that it should have had from the factory to divert the water. Without installing this piece, the water runs down the air shaft onto the blower motor and then onto the floor. I will get the link for the part that you need to divert the water. This is literally a fifteen minute job and the part from GM was $4.00 Install this before you get your new parts installed. Read about it here: http://www.grandprixforums.net/f73/w...-fix-6961.html