The passenger side of the engine
On a 1996 Ford Thunderbird : Through the automatic transmission fluid dipstick tube ( using a funnel ) The dipstick is located near the firewall , in the engine compartment , on the right side of the engine ( passenger side )
Bank 1 is the passenger side of your engine in a 1996 Ford Aerostar
The headlight relay on a 1996 Ford Thunderbird is in the fuse box on the driver's side of the dash. The fuse box can be accessed by opening the driver's door and removing the small door on the side of the dash. The headlight relay is the same one as for the battery.
On a 2002 Ford Thunderbird : Bank 1 is the passenger side of the 3.9 liter V8 engine Sensor 1 would be close to the engine BEFORE the exhaust enters the catalytic converter
On your 1997 Ford Thunderbird , 3.8 liter V6 : Bank 1 is the passenger side of the engine Sensor 2 would be AFTER the exhaust has passed through the catalytic converter
passenger side
passenger side under glove box near center console
Bank 2 is the drivers side.
Bank 1 is the passenger side of the engine in your Ford Ranger V6
Driver side
On a 1994 Ford Thunderbird , 4.6 liter V8 : Bank 2 is the drivers side of the engine Sensor 1 would be close to the engine before the exhaust enters the catalytic converter
On your 1996 Ford Thunderbird : In the fuse panel under the dash on the drivers side : ( the 15 amp fuse marked STOP / HAZ is the fuse for all 3 brake lights ) * the high mount brake lamp and the stop lamps