Or run off the same system, e.G, body control module? How to troubleshoot?
My mother's car ('92 Buick Lesabre) has two issues;
1) Blower motor works only sometimes (on all speeds). She had a "mechanic" look at it, but he couldn't find the problem. A second shop had a look at it (blower was working before entering shop) and said the switch, relay and resistor all check out OK. The motor is new and tests OK. They couldn't find any problem. It all worked fine on the way home and then started working intermittently again, the next day! Note: When the blower motor doesn't work, the indicator lights on the heater control don't work either.
2) Headlights, dash lights & interior lights won't shut off unless battery is disconnected. The second shop said she needs to replace the "headlight control module", but they didn't have one in stock to replace it. Do you agree with the diagnosis? If so, where is it located so I can get one from a salvage yard?
Are these two issues related to the same problem, e.G, bad BCM? Can you provide a systematic troubleshooting sequence for me to rectify both problems? Please provide wiring diagrams for both electrical systems?
have the same problem?
Tuesday, March 27th, 2012 AT 10:22 PM