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Unknown components

Old Feb 7, 2017 | 05:48 PM
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Default Unknown components

'92 LT1 coupe.
While replacing the interior plastic trim panel at the rear glass hatch I noticed two electric components. They were covered with a super sticky black tape. I peeled the tape off and one of the components is a battery. The other one has no markings at all. They are located next to each other to the right of the hatch release and wired together. About 4" x 2" x 2".
They are not part of the antenna. The wires are buried in the wire loom and I could not trace them. I have the factory service manuals but they don't have wiring diagrams.
Don't know how to post pics.
Any ideas?
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Old Feb 7, 2017 | 05:50 PM
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Sorry left of the hatch release.
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Old Feb 7, 2017 | 07:33 PM
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I'm quite sure you've stumbled upon the DIODE MODULE that actually controls cargo lamps when ONLY the rear hatch is open. I thought I had an image from a later year but I can't put my hands on it.

Look in the FSM 8A-114-10 for a description I believe and check your wire colors using 8A-82-3. If that checks out post back. If it doesn't post back the wire colors!! You said left but I'm quite sure all years was "right" like in this '94 image.

Name:  Rear Diode Module.jpg
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Last edited by WVZR-1; Feb 7, 2017 at 07:40 PM.
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Old Feb 8, 2017 | 10:48 AM
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Originally Posted by WVZR-1
I'm quite sure you've stumbled upon the DIODE MODULE that actually controls cargo lamps when ONLY the rear hatch is open. I thought I had an image from a later year but I can't put my hands on it.

Look in the FSM 8A-114-10 for a description I believe and check your wire colors using 8A-82-3. If that checks out post back. If it doesn't post back the wire colors!! You said left but I'm quite sure all years was "right" like in this '94 image.

Attachment 48061394
WV:
Thanks for the very detailed response. The diode you mentioned is in fact on the right side. However, these components are (were) on the left side.
It seems I'm dealing with some legacy components that no longer function. i.e. car alarm, remote hatch popper, etc.
I removed them and found they are no longer connected to the cars electrical system.
The 12V sealed battery feeds what I believe is a transmitter of some kind. The only output is a single "antenna" wire. I say antenna wire because it has a car antenna connector where it plugs in the unknown box. The only markings on the box are on a bar code label on the bottom.
5RLJ5603 15392
002D8BB
FCC I.D. IDILJU-01
Googled, no results.
I checked the battery with a DOM and it's dead.

Thanks again.
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Old Feb 8, 2017 | 11:08 AM
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Originally Posted by DAVECAD2.0
WV:
Thanks for the very detailed response. The diode you mentioned is in fact on the right side. However, these components are (were) on the left side.
It seems I'm dealing with some legacy components that no longer function. i.e. car alarm, remote hatch popper, etc.
I removed them and found they are no longer connected to the cars electrical system.
The 12V sealed battery feeds what I believe is a transmitter of some kind. The only output is a single "antenna" wire. I say antenna wire because it has a car antenna connector where it plugs in the unknown box. The only markings on the box are on a bar code label on the bottom.
5RLJ5603 15392
002D8BB
FCC I.D. IDILJU-01
Googled, no results.
I checked the battery with a DOM and it's dead.

Thanks again.
Are you sure it's maybe not a LoJack install from the past?

https://fccid.io/IDILJU-01

Look for a LoJack installer in the vicinity and do a drive by for confirmation. LoJack of course never published installation instuctions to the "PUBLIC" as it would have very likely defeated the purpose of the buy and install.

***I'd think this likely and when traded/sold the LoJack removed for refund/resale or moved to the next purchase. There would be no reason to move the components that you mentioned finding.

Last edited by WVZR-1; Feb 8, 2017 at 12:07 PM.
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Old Feb 8, 2017 | 01:33 PM
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Originally Posted by WVZR-1
Are you sure it's maybe not a LoJack install from the past?

https://fccid.io/IDILJU-01

Look for a LoJack installer in the vicinity and do a drive by for confirmation. LoJack of course never published installation instuctions to the "PUBLIC" as it would have very likely defeated the purpose of the buy and install.

***I'd think this likely and when traded/sold the LoJack removed for refund/resale or moved to the next purchase. There would be no reason to move the components that you mentioned finding.
You know I thought about that after I sent the reply. Then I thought its odd that the battery doesn't receive a maintenance charge from the car. The way they wired it one would need to periodically replace the battery?

Thanks for the additional info.
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Old Feb 8, 2017 | 01:45 PM
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Originally Posted by DAVECAD2.0
You know I thought about that after I sent the reply. Then I thought its odd that the battery doesn't receive a maintenance charge from the car. The way they wired it one would need to periodically replace the battery?

Thanks for the additional info.
I wouldn't think so. If it was early it's likely just a Lithium and wouldn't be rechargeable. If rechargeable it would need to be Lithium-Ion (I think that's right). Is it a little larger than a AA or what. LoJack I'm sure had maybe a 3 - 5 year replacement recommendation.

There's LoJack battery packs on eBay I'm sure. Maybe poke around there and see what you find.

Like I mentioned "visit an installer"!!
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Old Feb 8, 2017 | 03:44 PM
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Originally Posted by WVZR-1
I wouldn't think so. If it was early it's likely just a Lithium and wouldn't be rechargeable. If rechargeable it would need to be Lithium-Ion (I think that's right). Is it a little larger than a AA or what. LoJack I'm sure had maybe a 3 - 5 year replacement recommendation.

There's LoJack battery packs on eBay I'm sure. Maybe poke around there and see what you find.

Like I mentioned "visit an installer"!!
No dealers or service in my area. Car originally bought in Miami. So that makes sense. I live mid-state on west coast. Fla.
The battery is the type like used in home alarm systems. 4" x 2" x 2".
Yuasa 9205101.

Talked to LoJack. You buy their system, they install. No annual service fees. But, one this old they won't transfer. Would need to update. Not worth it for me. Their still just stealing bicycles in my hood.

Thanks again.

Dave.
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