Headlights come on when blower switch turned on

UPMM019

MEMBER
1997 PONTIAC GRAND PRIX
3.8L
6 CYL
FWD
AUTOMATIC
130,000 MILES

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.

3 Replies

JACOBANDNICKOLAS

MECHANIC
109,755 POSTS

Have you checked fuses? Have you checked the blower motor itself?

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Monday, May 12th, 2014 AT 6:26 PM

UPMM019

MEMBER
216 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?

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Tuesday, May 13th, 2014 AT 1:55 PM

JACOBANDNICKOLAS

MECHANIC
109,755 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.

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Tuesday, May 13th, 2014 AT 6:41 PM