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-90 Alarm module testing?

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Old Apr 25, 2009 | 04:36 PM
  #1  
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C4-owner
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Default -90 Alarm module testing?

Anyone knows what "pins" are A,B,C,D on the alarm module? Sometimes called chime module or tone generator.(the one giving alarm when forgetting lights on, key in ignition, seat belts not fastened).

I have one used part from a -91 vette, and if i know pin id i can test it on bench. I dont want to dig into my dash if my replacement part is also defect.

It has 4 "blade pins", and is located behind drivers information panel(above a/c panel).

Color code of the wiring is also ok info.

Sorry for my bad English.

Regards
Raymond from Norway
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Old May 1, 2009 | 01:41 PM
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Raymond,
A is the ground (.5 blk/wht)
B is Chime 1 input (.5 ppl/yel)
C is Chime 0 input (.5 ppl/yel)
D is main power (.5 red/blk)

B & C inputs are from the CCM.
D is fed from the LCD fuse.
A is grounded at S213 ( IP harness at base of steering column) and from there to G106 at the LR of the engine.
Hope this helps.
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Old May 2, 2009 | 02:58 AM
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Thanks for your info gw962, but not exactly what i was looking for . Sorry for my bad english :o.

I have one used spare alarm module on my table and want to test it (on bench) before installing it, but i dont know wich pin contact is A,B,C or D on the module?(no markings on it). If it doesnt test ok it is not nessecary to dismantle part of my dash to get to it.

Should be easily tested using a 12v battery by giving it power on D, ground on A and should chime when grounding B or C, or B and C together(3 different tones).

Cant find this connector layout in my wiring manual either, chapter 8a.

If someone has their dashboard open and can easily look at the connector(or has a picture of it) it will help alot. Thanks!

Raymond

Last edited by C4-owner; May 2, 2009 at 03:09 AM.
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Old May 2, 2009 | 05:29 PM
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Sorry, I didn't know the module wasn't marked.
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