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Sedans Buick LeSabre Buick LeSabre Heating / Cooling
100 messages, Last post on Nov 12, 2009 at 7:48 PM
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Replying to: elainee (May 23, 2009 12:26 pm) The motor end of the fan is down. The squirrel cage rotates in a horizontal plane. There is a connector that some people have found had poor or burned contacts. it's the one for the fan that leads to it. Most like the fan is toast. The brushes inside the fan and commutator wear fast. Poor supplier quality. Remove the carpet on the firewall by pulling it down toward the seat. You'll need the extra room. REmove three screws from fan holding it in place. Then Wiggle it out. Replacement should go in similarly. |
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Greetings, all. The blower motor on my 2004 Lesabre Ltd stopped working with essentially no warning. The electronic A/C control indicates it is telling the fan at what speed to operate, but no air is coming out. I have researched to the point that I suspect the blower motor and the blower control module. However, getting to the module requires I move the Dash Integration Module off its mounting bracket. I can't tell how the module is mounted to the bracket, so I don't know how to remove it. I have removed the blower motor, and observe that it has s three-pronged connector, and that the motor label indicates it expects 14V. Is there a schematic around that could tell me which two prongs are getting the voltage, so I could test the power  the connector? I hand-rotate the cage on the blower, and it seems to spin without resistance, but I obviously have no reference of how freely a known-good motor should spin. I would appreciate any additional advice anyone might have on this issue. It appears I can order an aftermarket blower from eBay for about $60, and a control module for about $90, but if someone has some info that might suggest another course of action would be appropriate, I'd be more than grateful. It appears my aunt and uncle, who have a 2001 Lesabre, spent some $700 getting this same issue fixed at nearly identical mileage (approx 67K)  Thanks in advance
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Replying to: soonerdew (May 25, 2009 6:24 am) There also is a problem on some, but I believe earlier than your year, where the ground strap from the armature loses contact with the housing. People lengthen that lead to ensure good contact. Some people have taken apart the working end of the motor to inspect the brushes and the contact--if you have electrical knowledge, you may be able to do that. It sounds like you're dedicated to replacing it if you mess it up by disassembling. A quick check of my 03 service manual shows A and B as the leads for the motor which are black and purple. C which is brown is a flange ground that goes back to the blower control module. The blower motor controll processor (the name for the blower control module) is held on by a screw at the top of the box. There's nothing else in front of it. Is your HVAC the dual temp with digital readout? The manual system may be different.
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Replying to: imidazol97 (May 25, 2009 7:22 am) That's led me to pulling the fan out, and trying to get the module out. The control system is the integrated electronic panel with digital display. |
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I have discussed my symptoms with a tech from a dealer that formerly sold and serviced Buicks, and he has strongly suggested that I replace the blower motor rather than the control module. He agreed with the likelihood that the motor has developed a "dead spot" similar to that which arises in some starter solenoids. He obviously cannot guarantee that is the problem, but he felt that was a much higher probability than the control module. I will be looking at an aftermarket blower, because the local GM dealer wants $300 for a replacement. I think not. |
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All: I thought I would update the status of my blower problem. I picked up an aftermarket blower motor here in town for about $139 before taxes (which is still more than the one I priced at ebay, but was looking at $40 shipping to get it out here with even the best shipping option). I installed the new motor and it worked perfectly, with no further indication of stopping or failing to start with the car. My trusty Buick is now comfy cool once again! Please allow me to offer my thanks to those who replied here. -Dave
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Replying to: soonerdew (May 26, 2009 5:28 pm) What brand was that blower motor you used? |
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I have been googling for 3 days. I keep coming back to this forum, and get close, but no cigar. Evidently my 94 is enough different in the vaccuum/controller setup from the posts I've seen to have me really confused. I have good vaccum to the controller where the white, green, black and orange lines go out to the separate actuators. What's next? I can't seem to find a schematic of which colored line is supposed to do what and when. As in when X button, such as the A/C Norm button is pushed, which actuator/door closes and which is supposed to open to direct air to the middle vents? Thanks in adavance for any help.
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Replying to: 2oldbuicks (May 27, 2009 10:34 am) |
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Sorry, I have the regular A/C, I think I have determined that either the little unit that the black vaccuum line goes to and is then distributed out to the different vaccuum actuators is defective, OR, the switch that you push to choose to determine MAX, NORM, HEAT, etc. is not working as it should. But I don't know how to test it.
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