09-20-2013, 09:53 AM
This is as you believe a federal car, as indicated by the hood sticker and the ECM saying "FED". I was familiar with this switch (due to fixkick) and did try turning it on and off with no change in MIL lamp. I mistakenly thought the wire going from ECM to bulb was +12v beforehand...I measured an impedence of roughly 26 ohms between chassis ground and pin A13 on the ecu with the key switch on, this to me means the MIL should be lit? Either way, I now believe from your help and my collections that the MIL is either disconnected or has gone bad. I did not get a chance to go tonight to work before it got dark, but I will go tomorrow with a fresh battery and new battery terminals to check the A13 to ground tomorrow. I hope MIL is bad or disconnected so this guy will tell me what is wrong.