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2006 Cadillac CTS 3.6
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157 Posts
Discussion Starter #1
Just noticed today on my 97 STS no interior lights are working except the door little lights that are near the window buttons.

All the dash lights work, just the lights inside car when you open the door dont work, nor does the cigarette lighter work.

Anyone have this problem before?
 

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1997 Cadillac STS (BOSE w/AUX In, Massage Seats, URPAS, "Z")
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6,405 Posts
Check your interior lights fuse. Is located in the engine compartment fuse cluster (driver's side under the fuse door).
 

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2006 Cadillac CTS 3.6
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157 Posts
Discussion Starter #3
I checked fusses this morning one cigarette lighter fuse was blown, put new one in still dont work. Fuse is still good.
I checked the 50 fuse underneath that cover was good. Checked the power block relay has 4 wires the orange one is broke. Corroded.
 

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1997 Cadillac STS (BOSE w/AUX In, Massage Seats, URPAS, "Z")
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6,405 Posts
Can you post a picture with what you found (the "power block relay") I don't understand what you mean. Do you have power to the interior lights fuse?
Underneath that cover on the top outer corner there is a fairly large relay mounted with the connections down. The wires connected to this relay are fairly thick (~12 AWG) but one wire is significantly thiner (~18 AWG). That is the wire that provides power to the interior lights fuse. Is that wire OK (should be double ferruled with the large wire underneath the relay terminals).
 

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1999 Concours, 1998 ESC R.I.P.
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19 Posts
Hey I got a 98 eldorado that was having the same problem. I looked at that relay and the wires broke in my hand they were soo corroded! I fixed the problem and all the lights work again.
 

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1997 Cadillac STS (BOSE w/AUX In, Massage Seats, URPAS, "Z")
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6,405 Posts
You have a leak in there, water gets underneath the hood and run along the fender (on the strut tower) and flows down to the relays underneath the cover.
 

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2002 Eldorado ETC & 1997 Seville STS
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116 Posts
My 97 STS has the same problem - no interior dome lights, no glove box light, and no trunk light. Heck, the air does not work either. I checked the fuse & relays look good. Is it necessary to remove the plastic shroud to gain access the wires that connect to the fuse box?
 

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1998 Sedan DeVille 1997 Eldorado
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1 Posts
I am having the SAME EXACT PROBLEM! I have no A/C (system is 2.5 years old), no interior lights (gauge cluster, radio, shifter, HVAC buttons) the only thing that is backlit is the headlamp control switch its self. Ive checked all the fuses in the front and back boxes. I relived that someone else is having this problem, and wondering if youve ever figured this out? Best of luck!
 
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