Swapped wiring problem, Cant get the CEL to come on Options

[6gsillyca]

I have a thread in the electrical sub-forum, but figured my problem is swap-wiring related.

Im trying to pull some codes from the ECU and I cant get the CEL to come on. The bulb is not burnt and the cluster itself is good so Ive narrowed it down to a problem in the cars wiring, somewhere. There are 2 other lights that dont come on (cruise and oil) but am not worried about these. I was told the cruise works but havent actually tried it yet, and there is an oil pressure gauge hooked up. No big deal. The one I need is the CEL...


Can anyone tell me if there is another way to pull codes w/o using the CEL

or

Is there another way to get the CEL to come on


Sorry for all the confusion

[Dr_Tweak]

WOAH hold up. The W in the diagnostic block has power coming to it, it needs to be GROUNDED, not jumped to +B which is positive power. The ECU ground the W circuit when it needs to turn the CEL on, power comes down from the 15amp guage fuse (usually) and then to the light, then to the ECU and the diagnostic terminal.

-Doc

[WannabeGT4]

WOAH hold up. The W in the diagnostic block has power coming to it, it needs to be GROUNDED, not jumped to +B which is positive power. The ECU ground the W circuit when it needs to turn the CEL on, power comes down from the 15amp guage fuse (usually) and then to the light, then to the ECU and the diagnostic terminal.

-Doc

His CEL isn't working... so W won't have any power coming to it, that is why he is simulating the CEL with a test light between +B and W just like the original circuit... +12V to bulb then on to ECU pin W which is ground for the circuit when the CEL is on. If he just put a test light between W and chassis ground the light would stay lit constantly even if the ECU was trying to display codes.