ALDL

[Daniel Burk]

Wade:  Your ALDL information is on pins A & B, which you get by shorting 
these pins out with a 20 K resistor, a 10 K ohm resistor, or a 3.9 K ohm 
resistor depending on the type of system you have.  Pin D is where the 
information comes out, in the form of a lamp level voltage (zero to 
twelve volts).  Your check engine lamp will oscillate with the digital 
data.  

If you use a 20K resistor instead of the 10 K resistor, your car runs in 
"normal mode" instead of the diagnostics mode, but provides the 20 byte 
data stream anyway.  The 3.9 K resistor puts your car in limp-home mode 
with a backup spark and fuel control map.


Give that a try.

	-- Dan