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1995 Sedan De Ville (4.9 L)
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581 Posts
Discussion Starter #1
I think my ALDL is different from what it is supposed to be.
It is 95 Sedan DeVille 4.9L (but I am not sure...)

Only terminals A, B, and, C are wired. Also there are terminals
just below terminal A and B (supposed to be M and no-name?).
So, total of 5 wires. And the protective cap for the connector
has a built-in metal pin that makes two terminals located below
A and B shortcircuited when the cap is on.

I assume A=ground, B=Diagnostic, C=A.I.R. What about other
two terminals?

Thank you in advance!
 

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Registered
1968 Cadillac Sedan deVille, 1994 Chevrolet G20
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2,795 Posts
The other two might be data for a scan tool.
 

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Registered
1995 Sedan De Ville (4.9 L)
Joined
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581 Posts
Discussion Starter #3
Thanks DaveSmed.

I was thinking to make a converter to connect the car to my
PC. I am supposed to have command-in and data-out terminals,
but I can't make sure...
 
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