not true, at all. kevin... (your answer is wits end ways)
guessing is bad.
The CEL LAMP MUST COME ONE KEYON.
The lamp is the PCM self test and glows key on.
if not , the fuse to the PCM is blown, 10cents, not $1000 new PCM.
I repair PCM for living, from 1970. to now. L-Jetronics to present.
here is a better list
Battery at 12.6v rested. lamps glowing dont mean squat.
the battery below 10v , the PCM will fail.
the electronics spec is 10 to 16vdc. that is the rules.
then fuses good. (ask how to test them with an Ohmeter.)ask.
1: new car to you? PO prev.owner removed lamp to up sales price.
we call this the Classic, CEL (MIL dead cause)
removed it or painted the bulb black or black electrician tap, tricky applied. or the CEL holder is missing, (jokers all)
2: the scan tool works 10x better, use one (no comms? fuse blown, good comms. does the MIL show active or not? if active and the lamp is out the lamp is burned out or the PO removed it, the scan tool will not lie to you ,like old funky dash lamps. and PO's from H3LL.)
3; the 94 is OBD1 PCM. (ECU) and can be key on 3 times checked)
to activate the cause of failure, DTCs.
ever do that? every read that? its a fact.
here are some more facts.
the Immoblize will alow car to start for 2 seconds then kills spark and fuel. so if it glows, at key on, and stays glowing , its a waste of time
trying to start car. its IMMOBILIZED>
if the IMMO light is happy and will not crank here is the
this tool can scan old jeeps 93-95 and up.
its only code reader but does do MIL status.
and readiness. and all DTCs.
to get the 3 key on test to work the CEL must be good.
that is why i use scan tools , so i dont need to waste time
with the lamp.
can take 1hr or more to replace lamp if bad or missing
btw, once access to lamp is attained, you can steal a unused lamp
for the CEL and fix it fast.
trick 2, on jeeps
put finger in ASD relay , and turn key on , then crank
can you feel it close, then drop out in 2 seconds.
does this help?, tell more, ask more. get more.