Headlights come on when blower switch turned on

1997 PONTIAC GRAND PRIX
130,000 MILES • 3.8L • 6 CYL • FWD • AUTOMATIC
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UPMM019
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  • 217 POSTS
I have a 97 grand prix and I have noticed that my A/C / Heat / Blower are not working but the strange thing is when I turn the blower switch on it turns on my headlights. The headlight switch is in the off position.

Looking for some troubleshooting help.
May 12, 2014 at 11:14 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
Have you checked fuses? Have you checked the blower motor itself?
May 12, 2014 at 11:26 AM
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UPMM019
  • MEMBER
  • 217 POSTS
Yes, fuses are good. blower had worked before this but what would this have to do with my headlights turning on when i turn on the blower motor?
May 13, 2014 at 6:55 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,248 POSTS
That's a good point... Have you checked the condition of the relay box? Look there to see if anything is melted or shows indications that power could be jumping between relays. There has to be a short to power. As a result, when you send power to the blower, the power is rerouting to the lights. Not a common issue.
May 13, 2014 at 11:41 AM
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