On Jun 18, 1:57*pm, charlie > wrote:

>
> If you have a 99 (maybe some 97s) or later, there are no blink codes for
> the ECU. The tens to ground forces "open loop", and has no direct
> relation to blink codes. *Effectively, there are three wires involved in
> the diagnostic plug under the dash. Ground, power, and the signal line.
> If the code reader turns on, ground and power are likely OK.

opps forgot to say early 95 m-ed.
i believe odb II came in some late 95's
peter