The 1999 Oldsmobile headlamp module is located on the firewall in the engine compartment. The headlamp module will be on the drivers side of the firewall.
Right behind the battery, under the hood is a fuse box. In the fuse box there are two black relays. One is the headlamp driver module and the other is the cooling fan relay. They are right next to each other. I am not 100% sure which is which, but unplug them and put one in at a time and you will find out quick which one is the cooling fan relay. I had a bad headlamp driver module so I switched them to find it.
relay in the hood fuse box HDM relay (Headlamp Driver Module)
The transmission control module is located on the front section of the fender under the headlamp assembly. You will have to remove the passenger side wheel to get to it.
The ignition module for a peugeot 106 is in the engine compartment. Facing the car with the hood open, the ECU is behind the headlamp nearest your left hand.
the quad driver module is a component of the ECM. you must replace ECM.
THE FUEL PUMP DRIVER MODULE IS LOCATED ABOVE AND TO THE FRONT OF THE SPARE TIRE.
have a look here http://home.comcast.net/~slashpub/
The Chevrolet
The transmission control module is mounted under the dash. It is on the driver's side, beside the ECM module.
On a 2004 GMC truck, the airbag module is located underneath the carpet at the foot of the driver's seat. It can be accessed by pulling out the driver's seat.
The airbag module is the blue module box under the dashboard near the feet of the driver.