Will a bad blower resistor cause the Day Lights to shut off when the blower is turned on on a 2001 Grand Prix?

Answer 1

No the two systems are not connected. This most likely a power consumption problem. -------------------------- This is a problem with the ignition switch. The power for many of the systems runs through the ignition switch and over time carbon build-up prevents good conduction in the switch. The power for the heating/cooling fan runs through the ignition switch for fan speeds 1-4. Speed 5 is straight through from the battery. You might notice that the lights operate fine when the fan is on high (5). I completely removed my ignition switch, disassembled it and cleaned the contacts with 800 grit sand paper. This solved the problem. It is not simple and will require special tools. Check out the write up here for great pics and detail: http://www.clubgp.com/newforum/tm.asp?m=20670&cookieCheck=379102905 I dis-assembled the ignition switch in place without removing it from the car. It's difficult to work on in the car but saves time removing the wiring harness, etc. The dealer could not figure this one out, by the way. They replaced the blower resistor, fan switch, etc., etc.