Two problems related to defogger heater have been reported for the 1999 Oldsmobile Intrigue. The most recently reported issues are listed below.
Car exterior and interior lights will dim and then brighten while driving at night. Seems to act up more in colder tempertures but is still acting up in warmer weather. Fan speed for air & heater will flucuate. They have replaced the altenator but it didn't correct the problem. Also having probelms when starting up the car. Acts like it is "missing" but no engine check light came on. Dealership tried running a fuel injector fluid through it but hasn't corrected the problem.
Windows fog easily resulting in lack of visibility; little side window airflow, although front windshield gets a lot; even with 1 adult in car, often all side windows fog; rear side windows are worst; tried all hvac modes to no avail.