1997 Saturn SC1 Horn and Interior Light Issue on Saturn SC1

1997 SATURN SC1
128,000 MILES • 4 CYL • FWD • AUTOMATIC
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TITAN318I
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Hello, my girlfriend just purchased a 1997 SC1 which had a couple issues that may be linked. Right now I’ve noticed the following problems:

Horn does not work
Interior light turns on with Passenger door, but not Drivers
Interior/Dash lighting below Radio (Heat, AC, etc) does not light up.

All fuses look good, engine and passenger side, and it is a factory radio, so no odd installs. Searched the forum with no luck, hopefully someone has some advice, thanks!
Sep 23, 2010 at 12:29 PM
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SATURNTECH9
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First of all thank you so much for your donation.It look's like we have a few different problem's actually.I would like to fix one issue at a time a lot less confusion for both of us.Do you have a multimeter?You will need one to trace the problem's down.
Sep 23, 2010 at 1:38 PM
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TITAN318I
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Unfortunately no multi-meter, but I do believe the dome light situation is just due to a stuck plunger. Main concern is why the heating/ac unit is not lighting up
Sep 23, 2010 at 1:56 PM
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SATURNTECH9
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If the door jamb switch is stuck you will need to replace it.You will need a multimeter to diagnose the heating/ac unit is not lighting up is it only that not lighting up?I have seen a bad ground cause that.Or it could be just a bulb but without a multimeter it's hard to tell.Your horn could just be a bad horn but again without the meter it's hard to say.
Sep 23, 2010 at 2:22 PM
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TITAN318I
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Thanks for your help, I'll look into using a Multi-Meter to narrow it down
Sep 23, 2010 at 2:36 PM
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SATURNTECH9
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When you get a multimeter let me know and we can go from there.
Sep 23, 2010 at 2:59 PM