Ok, here is the problem, I just purchased my 1993 ssei and the ses light was on, so I pulled the codes and codes 17 and 42 came up. Since these both are related to spark I changed the ICM. I had the neg battery term disconnected while doing this. So I start her back up and right away the ses light is on. So I check for codes again and No codes show up but 12. When I try to read the codes the ses light never goes out it just get a little brighter when it flashes codes! HELP, NOW WHAT????

Thanks in advance.

Hey I really need some ones help with this one. One more thing if I disconect the 02 wire I still won't get a code. HELP ME PLEASE!!!!

Well the only code I get is code 12 diagnostic mode.

Mark.. check the connections to the pcm. Ensure none are disconnected or corroded and possibly causing a connection issue.

Ok, thanks guys I will check the connections and if that won't work, I will get it scaned friday.

Ok here is the follow up to this problem. I took it to the local BEND ME OVER dealer...oops I mean GM dealer and they said that it was the instrument cluster. :( That it had a short or something that was making it light by residual voltage. :? So I bring her home and check the battery connections. Holy mother of all corrosion Fat man, both positive terminals were horrid So after about 30 min of cleaning I put some dielectric grease on them, and reassemble. Hoping that this was the cause of my problems! I get in start the car and the ses light is brighter than ever....So I check for codes...Light will not blink at all now! Fans run like normal but no blinky...NOW WHAT????? I need some more help here guys.

That'* why they are first on the list when we hear about electrical problems. An easy free possible fix up.

Ok so I need more help...Um I mean with my car. Now the ses light is on bright as He!!. Now I can't even read any codes because there is no variance in the ses light from bright to dim just BRIGHT. Should I try replacing the computer? Or point me in a direction.

Thanks guys!