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Interior lighting problem

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Old Dec 9, 2012 | 12:19 PM
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Default Interior lighting problem

1991 Automatic

The lights are out for the gear selector, climate control buttons, seal adjustor, power windows, mirror adjust , light switch and selective ride control. Everything is fully operational just no lighting.

The gauges, speedometer lights are fine, can dim and brighten as normal.
Checked the INST fuse and was not blown, but replaced it anyway, still nothing.

Anyone have a suggestion as to where to start?
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Old Dec 9, 2012 | 12:23 PM
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the climate control on a 95 is fused with the AC Clutch on my 95....
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Old Dec 9, 2012 | 12:47 PM
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Did you check all the fuses? Might have a bad ground somewhere? Did it happen all of the sudden?
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Old Dec 9, 2012 | 01:56 PM
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Started up in the morning and they were out.
I did check each fuse and all were ok. With the lighs on I found there no voltage at the hot side of the fuse. Looks like I lost power some place.

Last edited by ks376smith; Dec 9, 2012 at 01:59 PM.
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Old Dec 9, 2012 | 01:56 PM
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Originally Posted by ks376smith
Checked the INST fuse and was not blown, but replaced it anyway, still nothing.
If the R INST 10 amp fuse is good, the Incandescent Power
Driver is most likely bad. It's bolted to a bracket next to the
LH side towards the middle of the steering column. Has a white colored Molex type plug plugged into it.

Have to remove the carpeted and metal panel below the steering column to get to it.

Someone posted it used a 2n3055 transistor.
Radio Shack #276-2041 around $2.00.

Delco D1509B

Link below shows one available from Amazon.

http://www.amazon.com/ACDelco-D1509B...ype=automotive


Last edited by Hooked on Vettes; Dec 9, 2012 at 02:08 PM.
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Old Dec 9, 2012 | 02:07 PM
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Thanks, I give it a try next weekend. Have to go on a trip for work.
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Old Dec 9, 2012 | 05:08 PM
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Originally Posted by ks376smith
1991 Automatic

The lights are out for the gear selector, climate control buttons, seal adjustor, power windows, mirror adjust , light switch and selective ride control. Everything is fully operational just no lighting.

The gauges, speedometer lights are fine, can dim and brighten as normal.
Checked the INST fuse and was not blown, but replaced it anyway, still nothing.

Anyone have a suggestion as to where to start?
I had the same problem with my 94. On the pass side of int. if you look under dash just behind the dash cover you will see 4 relays. They are all the same and are standard relays, check for corrosion in the box. I cleaned it out and installed new relays. One of them was for the int. lights. Hope this helps
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Old Dec 15, 2012 | 02:49 PM
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Interior lighting problem corrected

The incandescent power driver was the fault.
Removing and reinstalling is differently a task.

As recommended I replaced the transistor 2N3055 Radio Shack 276-2041, $2.96



This is my third vette: 1967 sold for a 1970, not the LT1, and sold it for this 1991.
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