all ways.......
it glows! stuck glowing, sure..... that means car is a USA car,
and means its not calif car. and not outside USA. (Usa fed law car and...)
and means (all true?) means the NAG lamps is glowing,
see here......
remove the nag wire cable from speedo rear or slide its switch every 50k. (best is to leave the nag switch in the attic ? grin !)
click nag, the slider can be in 3 places.. (yours was hidden you found it)
http://www.fixkick.com/CEL/cel-index.html
you tried both positions of switch, and you unplugged the nag cable, seen above.
so its not the nag.! nag is gone, so.....
what is it.?
well the CEL wire is shorted to ground, (unlikely) pin B13 on ECU. shorted to ground in harness... nah.....
or the ECU is bad.
schematic
http://www.fixkick.com/ECU/8v-tbi-schematic91to95.jpg
the ECU when in backup mode (self detected death) will cause lamp to be dead or stick on.
bad ecu. sorry.
or
the 2 wires from DLC are bad. (one is ground, cut or missing, other is diag pin, cut or missing wire) here.? look for damage here and at ECU plug.
what DLC are you using,? engine bay?
only the engine bay DLC is to be used, next to the battery.
most 91's has just a 4 pin plug at battery front. (with rubber cap, do not not use other option (missing options) here. there are some.... there.... all wrong. the DLC has a rubber cap , black.
and B >C is the jump pins,, a paper clip, no plastic clips, only steel clips. or wire jumpers allowed.
it must flash or the ECU is toasted.
http://www.fixkick.com/CEL/DLC/fed-car-diag.jpg
FYI:
to get a bench tested ECU to flash? (tells how simple it is)
1: connect power pin and ground to power supply 12v or battery.
2: CEL wires to ECU (12v to lamp and lamp to cel pin on ecu. B13
3: ground the PIN B above. and the Ecu will flash out, all sensors dead. (ecu pin A3 is blue-yel)
see"?
just 6 wires on the bench and bam, it will flash all codes. huge number code. never ending, chain of failures. loops. (all sensors missing here)
More on backup mode
when the ECU boots, it will do self tests, if the self tests go hard failure. it drops to Backup mode. (i call this lawn mower mode, just near fixed spark timing and fixed fueling rates, horrid to extreme this...)
it may run or just flood, most folks report its flood city......
the clicking is ECU failure.
it's rebooting over and over.. can be causes by shorted caps. or main regulator on ECU dead. or overloaded for some reason or gee a weak car battery, 12vdc not 10vdc is correct.
you put caps in Minus to minus plus to plus?
it glows! stuck glowing, sure..... that means car is a USA car,
and means its not calif car. and not outside USA. (Usa fed law car and...)
and means (all true?) means the NAG lamps is glowing,
see here......
remove the nag wire cable from speedo rear or slide its switch every 50k. (best is to leave the nag switch in the attic ? grin !)
click nag, the slider can be in 3 places.. (yours was hidden you found it)
http://www.fixkick.com/CEL/cel-index.html
you tried both positions of switch, and you unplugged the nag cable, seen above.
so its not the nag.! nag is gone, so.....
what is it.?
well the CEL wire is shorted to ground, (unlikely) pin B13 on ECU. shorted to ground in harness... nah.....
or the ECU is bad.
schematic
http://www.fixkick.com/ECU/8v-tbi-schematic91to95.jpg
the ECU when in backup mode (self detected death) will cause lamp to be dead or stick on.
bad ecu. sorry.
or
the 2 wires from DLC are bad. (one is ground, cut or missing, other is diag pin, cut or missing wire) here.? look for damage here and at ECU plug.
what DLC are you using,? engine bay?
only the engine bay DLC is to be used, next to the battery.
most 91's has just a 4 pin plug at battery front. (with rubber cap, do not not use other option (missing options) here. there are some.... there.... all wrong. the DLC has a rubber cap , black.
and B >C is the jump pins,, a paper clip, no plastic clips, only steel clips. or wire jumpers allowed.
it must flash or the ECU is toasted.
http://www.fixkick.com/CEL/DLC/fed-car-diag.jpg
FYI:
to get a bench tested ECU to flash? (tells how simple it is)
1: connect power pin and ground to power supply 12v or battery.
2: CEL wires to ECU (12v to lamp and lamp to cel pin on ecu. B13
3: ground the PIN B above. and the Ecu will flash out, all sensors dead. (ecu pin A3 is blue-yel)
see"?
just 6 wires on the bench and bam, it will flash all codes. huge number code. never ending, chain of failures. loops. (all sensors missing here)
More on backup mode
when the ECU boots, it will do self tests, if the self tests go hard failure. it drops to Backup mode. (i call this lawn mower mode, just near fixed spark timing and fixed fueling rates, horrid to extreme this...)
it may run or just flood, most folks report its flood city......
the clicking is ECU failure.
it's rebooting over and over.. can be causes by shorted caps. or main regulator on ECU dead. or overloaded for some reason or gee a weak car battery, 12vdc not 10vdc is correct.
you put caps in Minus to minus plus to plus?
http://www.fixkick.com