I think it is key to on, but engine not running. In addition, you can also read the flashing on the CEL rather than a test light. If you use a test light, yes, I would assume that it is a 12 volt test light.

And read this.
http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=trouble&Number=441544&fpart=&PHPSESSID=

Last edited by Tony2005; 05/05/06 12:10 AM.
"Always do the cheap and easy ones first." 1996 V6 ATX 96K miles