C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Assembly Line Diagnostic Link missing???

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Old Jan 8, 2014 | 01:12 PM
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Default Assembly Line Diagnostic Link missing???

Hello friends,

I wrote weeks ago because my 1988 Corvette does not start sometimes (engine cranks but do not explode). Some of you recommended me to check the Assembly Line Diagnostic Link (ALDL) to retrieve an error code.

I am ashamed, but I am unable to find the ALDL conector...

I have read the info to get the codes and I understand it, but I do not find the conector. I think that it should be near my right knee when I am in the driver's seat, but must I remove something first, or is it directly visible???

Is it possible that my car has not an ADLD conector? Thanks!
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Old Jan 8, 2014 | 01:58 PM
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Unless the link has been removed, it should be just under the dash about 6" in opposite your right knee. It is just a small rectangle open 'box', unless the cap is still attached. The cap is just a slip fit component.

This link shows the ALDL removed with jumper wires:

http://tech.corvettecentral.com/2011...trouble-codes/
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Old Jan 8, 2014 | 03:21 PM
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If someone took off the hush panel under the dash and didn't reinstall the ALDL connector correctly it can get pushed up in there. You might need to remove the panel to find it and reattach it.
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Old Jan 8, 2014 | 06:42 PM
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A previous owner or backyard stereo installer tucked mine away inside the hush panel on my '84. I put it back where it should be mounted.
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Old Jan 8, 2014 | 10:37 PM
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Originally Posted by Matatk
If someone took off the hush panel under the dash and didn't reinstall the ALDL connector correctly it can get pushed up in there. You might need to remove the panel to find it and reattach it.
I had to remove the panels and search for it. The PO had shoved it way up there and the connector was "hidden" on top of some other wiring.
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Old Jan 9, 2014 | 03:25 AM
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I took a pic of mine a while back (on the far right):



I have heard that sometimes it is unscrewed and stuffed up behind the HVAC control head by people who don't know better...

Last edited by Cliff Harris; Jan 10, 2014 at 01:10 AM. Reason: Corrected spelling error.
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Old Jan 9, 2014 | 03:53 AM
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If the screw stripped, the nut clip is missing or they just got plain lazy, the connector is probly just pushed up above the hush panel as mentioned. I cant imagine someone removing it.
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