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1990 Buick Lesabre Two Electrical Problems

Tiny
CLASSIC1951
  • MEMBER
  • 1990 BUICK LESABRE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 139,000 MILES
Thank u in advance 4 your assistance: First electrical problem: No low and medium speed blower. Blower works on high setting. Have replaced resistor and heating/AC switch to no avail. Can not find any bad fuses in fuse block on driver's side. Not sure about the fuses on the passenger side. Second electrical problem: ECM has set a hard code for cam sensor though the car runs fine. Replaced cam sensor and disconnected battery to clear code. No difference. The check engine light remains on and stored code is the same. Car will run fine. What gives? I'm out of ideas. Any assistance you can offer would be GREATLY appreciated!
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Friday, December 4th, 2009 AT 4:33 PM

1 Reply

Tiny
BMRFIXIT
  • MECHANIC
  • 19,053 POSTS
Very common for the blower motor resister to be at fault
also check its connector and wiring

as for the cam sensor and its code
check wiring between sensor and ECM
remove sensor and check cam shaft sprocket
if all ok ECM at fault and need replacement
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Saturday, December 5th, 2009 AT 6:43 AM

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