CHECK engine hell

[fixkick]

My check engine light is on. 94 Sidekick JLX. 4 door auto. Loaded. 229000 miles. Jumped the wire it say 12. No codes. Reached under the dash and moved that tiny switch. Did nothing. Removed the dome light fuse as I saw on YouTube. Still on. Battery was disconnected. Still on. What am I missing ? I wouldn't care but I live in California and I have to get it inspected.

The vehicle does not have California emissions. When I say on I mean the check engine light is still on while the vehicle is running. The car was from Washington state and owned by on older person so we doubt "wrong" parts were put on. When I used the jump wire the code ( check engine light ) flashed once , slight pause, then two more flashes equals 12. Meaning no other codes were stored in memory. I disconnected the battery and THE check engine light was still on after.

ok it is a federal car i calif, nothing odd there,..
the lamp shows code 12,  so the ECU sees no errors at all.
I disconnected the battery and THE check engine light was still on after.

so the nag switch is in the wrong position, or speedo failure not  using rule trips at every 50k, 80k& 100k miles,,  due to gear failure in the speedo.. pull the plug.
it is just a timer this NAG to tell you to test the CAT for damage using leaded fuel back then
it is a useless feature now,  from them,  and simply unplugs from the back of the Speedo cluster.
my 91 was Fed and from Wa. WA DOT too and , the nag switch removed the second I got it, it does  need to be there.

also with any car like this that many miles the mileage gears  (nAG parts in the cluster ) can fail too. and the cure is remove the NAG switch, it just unplugs easy,
here is the nag socket on cluster. the speed gear box counts the miles and set the NEG ON ,and glow the CEL lamp independent of ECU errors !

see page 9, here and C1, c3 , c5./A5 NAG switch,  it runs off gears and if fails make CEL stick on. pull the plug  and now only ECU can wink  the CEL ,ever again.
https://fixkick.com/look/91-complete.pdf


https://fixkick.com/CEL/NAG-Lamp.html