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Discussion Starter #1
I have a 1997 Cadillac Deville and the headlights would turn on UNLESS the headlight switch is off and the Twilight Sentinel (TS) is off. Once the headlights are on and I pull the headlight switch the lights go off or if I turn the Twilight Sentinel on thr lights go off.

When the headlights are on (switch off & Twilight Sentinel off) the instructment panel displays "Headlights suggested".

Before I start replacing everything can someone tell me what is causing this problem?
 

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99 STS 2005 SRX
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i have a 94 eldo & the headlights would go off by their self while driving at night.
i sprayed some wd 40 into where the turn signal lever enters the steering
column. i then kept switching from hi to lo and back and forth.
all seems to be ok now hopefully.
i hope this helps . rich
 

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Discussion Starter #3
hazelshome said:
i have a 94 eldo & the headlights would go off by their self while driving at night.
i sprayed some wd 40 into where the turn signal lever enters the steering
column. i then kept switching from hi to lo and back and forth.
all seems to be ok now hopefully.
i hope this helps . rich
I'll try spraying some wd 40 this week-end and let you know if it helps, thanks for the suggestion.
 

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Discussion Starter #4
klute said:
I'll try spraying some wd 40 this week-end and let you know if it helps, thanks for the suggestion.
WD 40 didn't help.

Problem turned out to be the HeadLight relay switch. Located under/near the fuses on the driver side under the hood.

Cost $20.00 at NAPA.
 
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