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Sedans Buick LeSabre Buick LeSabre Electrical/Lighting
182 messages, Last post on Sep 29, 2009 at 9:57 AM
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I have a '94 Buick with problems ranging from the air compressor for the suspension(which came with the car) running when the car is sitting in my garage, which consequently runs the battery down. I also have a problem with high idling and the speedometer not working, which I have been told can either be traced to the ECM or the corresponding sensors. It's a real shame, because aside from a few cosmetic problems, the car runs really well for its age. I'm pretty much stumped right now...any ideas?
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Replying to: demoncarnut75 (Jul 24, 2007 7:37 am) Are you sure it's the compressor for the air leveling struts. I know the heater blower fan can run after the car is off because of the electronic board for the fan speeds failing and leaving the heater blower running. Same group suggests high idle and no speedometer may be the ECU/PCU, in other words the computer. They claim 94 and 95 H bodies and another GM model used that computer for only those two years. The EPROM chip is removed from your old computer and placed in the new computer... 
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Replying to: imidazol97 (Jul 24, 2007 8:15 am) As far as the computer goes, I have already taken it out of the car and the repair manual says the numbers on the ECM and PROM chip should match...would it be possible to take the computer somewhere by itself to have it checked? At the very least, it would be helpful to find some kind of resource online to be able to check the numbers. I appreciate the help. Thank you.
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Replying to: demoncarnut75 (Jul 25, 2007 8:13 am) You are saying that you have the manual control AC? If it has a level then it does not have the electronic circuit board to control the fan speeds. I has the resistor set for the lower speeds and the high speed is controlled by a relay on the firewall. Another thing is the ground bus connector that's under the plastic around the doors right below the parking brake area. Are there any other symptoms? Power door locks not working and then working again? Frankly if your battery has a few years and may have been teased to death by the pump for the load height compressor running, that's the place to start. Walmart would be an easy pick. Many stores will check battery and alternator free. You can take your battery in to some stores, like Advance Auto, and they'll test it and charge it up. That would be a way to tell if it's marginal. Sears, not my pick, or Walmart and others will check the alternator output. |
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Replying to: kcwolfpack59 (Jan 19, 2006 7:16 pm)
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Replying to: freddie07 (Jul 31, 2007 9:06 pm)
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Replying to: freddie07 (Jul 31, 2007 11:15 am) |
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2000 Buick LaSabre...I have replace all four window motors and regulators in the past three years (one of them, twice)...Approx. $1,600...Did I miss a recall on these things? Help to 45Bob57
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| I have a 1997 Buick Le Sabre. The speedometer isn't working. Can you tell me how to locate the ECU cable or sensors for the speedometer or if this involves the computer on the car. elaine13 | |
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Replying to: imidazol97 (Jan 04, 2007 2:11 pm) |
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