2004 Pontiac Grand Prix Blower / Fan Motor

You have to install a capacitor at the blower motor. Here is a bulletin for this problem. Some customers may comment on an inoperative or intermittent Heating, Ventilation and Air Conditioning (HVAC) blower motor. Others may comment that the blower motor speed may momentarily drop or that the blower motor continues to run after the key is turned off. This condition may be caused by a voltage spike from the wiper motor. The voltage spike may cause a logic lock up in the blower motor control module that may be either momentary or permanent. Disconnect the negative cable from the batteryRemove the right closeout/insulator panel. Disconnect the wire harness connector to the blower motor control module. Install a capacitor, P/N 25073556, into the blower motor control module connector using the following steps. Refer to the illustration above to locate the positive and negative leads of the capacitor. †Strip a short length of insulation from the red wire in cavity C, circuit 442, of the blower motor control module connector. Using a splice clip from the J-38125 Terminal Repair Kit, crimp the positive lead of the capacitor to the red wire.

†Strip a short length of insulation from the black wire in cavity A of the blower motor control module connector. The circuit number for Buick vehicles is 1450 and for Pontiac vehicles it is 150. Using a splice clip from the J-38125 Terminal Repair Kit, crimp the negative lead of the capacitor to the black wire.

†Solder both crimp connections.

†Cover both crimp connections with electrical tape.

†Tape the capacitor to the blower motor control module wiring harness and cover it completely with electrical tape.

If the customer concern was of a blower motor that continues to run after key off, then replace the blower motor control module and install the capacitor. Reconnect the blower motor control module connector.
Install the right closeout/insulator panel. Reconnect the negative cable to the battery. Here is the part # to the capacitor 25073556

To answer your question I got the bulletin from the dealer.(I work at the dealer that how I got it)to answer your other question when you had the water leak it probably got on the resistor and could have shorted it out. For you to fix it wright read the bulletin again. You have to install a capacitor also to fix this problem. If you put a resistor in it might only fix half your problem. It's hard to fully answer your problem without actually looking at the car. This is the best advise I can give you.I would post a picture of the capactor but I don't know how. Post back with what you find.