Maybe a bad ground?
I wouldm't say that, they have left out or changed few things in the diagrams from what I can see. On page 8A-201-5 Figure E shows the PCM. I appears there are 3 connectors under the PCM that plug in. There are identifying numbers pointing to the harness S218, S246, and S285. It is located behind the RH side of the instrument Panel.I can't ell by looking at the diagram where it is in relation to other components. I would say for sure it is near the top of the dash with the connectors on the bottom side. I will say this from what I have read, they heavily emphasize on disconnecting the air bag to prevent it from deploy. You have a diagnostic energy reserve module that keeps power going to the air bag system. The wrong move and KABOOM!! If you are sitting in the passenger seat, the BCM is on top of heater A/C in the body under the dash. If you take the glovebox out, screws and there are the switches for the trunk release fuel door and connections fro the glove box light. You can see the relay center to the RH side, the BCM is to the left. If you have never been in the dash of these cars, I couldn't see doing it without the book.thanks dennis, my diagrams are probably of not much use then.
+1 alldata is ok, just hard to navigate. one of these days im gonna break down and buy the FSM.I couldn't see doing it without the book.
The FSM does help, probably more than Alldata? Anyway, I went back to the manual with a cleared mind. Sometimes it gets a bit boggling when you have all the pages to thumb through trying to find where this and that go. Just to get a better idea of where the components are, I thought I'd try to remove some connections and do some cleaning without pulling off the dash. I should take some pics and put them up on my hosting site. I am going to start from the beginning by what you are going to need to do just to see what you are looking for. Start by removing the cover under the dash all across from left to right, that way if you drop something, it will go to the floor and lett a little more light in. Next remove the glovebox, screws are all inside, be careful with the wires. Mark the wires or make a note how they connect to light and switches. They all have different connections so that should be easy. The drawings don't show all of the components together on the same page just the highlighed component with a herness and arrow to identify. When you are sitting in the passenger seat, you can see the RH fuse , relay center. I would say the PCM is just left of it closer to the firewall? The PCM has 3 connectors at the bottom of it, location page 8A-201-5. It is more of a vertical position. The BCM is behind the glove box, (above the heater A/C box, look for the levers on the the top of the box), look for 2 connectors, FSM page 8A-201-14A. Some of the drawings are pretty decent, some are real crappy. A full page drawing would have been nice. I don't know how hard it is to get the connectors off to clean, but it is worth looking at. Now that I think about having been in there, I think my PCM is loose whatever secures it to the body. I wasn't sure what module it was and had to button things up that night.+1 alldata is ok, just hard to navigate. one of these days im gonna break down and buy the FSM.
and I had to go under the dash to replace the brake peddle switch and to get to some bolts to replace the evaporator. Trick is to get used to standing on top of you head (literally) and then diving into the sea of wiring, ducting, and modules.