Disco I 1997. It has both the amber check engine light and the red service engine light.
RAVE says that look for the hole in the ecm and insert a pin to reset the red service engine light. I searched here in the forum and found the same thing, plus someone mentioned that the 'hole" is covered by a LR sticker.
I did not find any hole. Maybe I looking in the wrong place. I am attaching a picture of what I think is the ecm. I will appreciate if someone that has actually done it can guide me. Thanks.

 

The reset is NOT in the ECM, it is in the service reminder relay.
Behind the passenger side kick panel.
Discoweb.org has a good write up on this with pics in their tech section.

 

Thanks Spike555. That helps, at least I know now where not to look. Unfortunately for some reason I cannot open any of the Discoweb.org pages.

 

Yeah their server goes down from time to time.
Keep trying, also try clearing your cookies and see if that helps.

 

Wow, Thanks Spike555. That is a great site. Exactly what I was looking for. The pictures are excellent. Thanks again for the tip.

 

I got the service engine light reset. I just want to note that there was not one, but two holes under the sticker. The one that actually reset the light was not the one under the LR logo, but one toward one side. Thanks again.

 

Glad you got it worked out.