Surprise! I have a trunk light! - Impala Tech
Electrical & Wiring Troubleshooting electrical problems

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post #1 of 9 (permalink) Old 08-03-2017, 04:38 PM Thread Starter
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Surprise! I have a trunk light!

I've owned my 65 Impala convertible for almost 20 years. Today, I was doing a bit of detail work, replacing the nose and trunk emblems. While sitting in the trunk looking up, I noticed something very interesting. The trunk lid has the optional trunk light! No bulb. I pulled out my meter, and it is getting 12v. Soooo... what bulb goes in there?

<edit> Seems like it's a 1003. I'll grab one tomorrow and see how it works!
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Two doors, four doors, wagons, and ragtops.

Last edited by jayoldschool; 08-03-2017 at 06:32 PM.
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post #2 of 9 (permalink) Old 08-03-2017, 06:28 PM
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1134 I think from memory, One filament, same size as the 1157.

Big Dave
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post #3 of 9 (permalink) Old 08-13-2017, 11:40 AM
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Garage
I hate to correct Big Dave but it is a 1156.
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post #4 of 9 (permalink) Old 08-13-2017, 04:28 PM Thread Starter
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Hmm. Rockauto shows the "trunk/cargo area light" as a 1003. So I bought one. It doesn't work.

Two doors, four doors, wagons, and ragtops.
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post #5 of 9 (permalink) Old 08-13-2017, 09:03 PM
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Bulb

Correct on the 1003 bulb for the trunk light.

Paul

Paul

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post #6 of 9 (permalink) Old 08-13-2017, 09:33 PM Thread Starter
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That's what I thought. It fit perfect. I will take the housing out and test everything with the voltmeter tomorrow.

Two doors, four doors, wagons, and ragtops.
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post #7 of 9 (permalink) Old 08-14-2017, 09:52 AM
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Light

Silly question but just want to check that the housing is installed while you are testing the bulb?
I am asking because you mentioned that you were getting 12 volts, so short of the bulb being bad, not much to this connection. As long as the housing is connected which give you a ground just wanted to make sure. I know people have held the housing in their hand and checked the bulb which would not work due to no ground plus the Mercury switch may not be engaged based on the angle you hold the housing.

Paul

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post #8 of 9 (permalink) Old 08-14-2017, 11:21 AM Thread Starter
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Yes, housing is screwed in place on the trunk lid. I'll recheck it for voltage today, and check the bulb I bought. I was pressed for time when I came home from the parts place, so I simply clicked the bulb in place, noted that it didn't work, and put troubleshooting off for later.

Two doors, four doors, wagons, and ragtops.
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post #9 of 9 (permalink) Old 08-14-2017, 11:31 AM
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Like Paul mentioned the Mercury switch is frequently the problem. It comes on when it is perfectly level and goes off when the angle increases causing the Mercury to run to one end.

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