Where is the brake light relay in 1999 Oldsmobile Aurora?

There is no brake light relay. There is however a brake light switch located above the brake pedal.

The 1995 Oldsmobile Aurora blower motor relay switch is located beneath the dashboard on the passenger side. The blower motor relay switch should be labeled as such.

how do i check the relay fuse for the fan on a 95 oldsmobile aurora

Most of the relays for the 1997 Oldsmobile Aurora are under the back seat on the drivers side.

The 1991 Volvo brake light relay switch is located beneath the drivers side dashboard. The brake light relay switch will be above the brake pedal.

Sounds like a bad switch or relay.

The relay panel on the 2000 Oldsmobile Alero is under the steering column and above the brake pedal. The relay pops out with a screwdriver.

The brake light is controlled by a relay switch. If the relay switch is bad the brake lights will stay on. The brake light switch simply plugs in and out. Unplug the brake light switch until you can replace it.

The 1996 GMC Yukon brake lights work by receiving power from the brake light relay switch. The brake light relay switch is connected to the brake pedal.

Front passenger side of engine bay in fuse box.

The flasher relay is located under the steering column support.

The brake light switch relay for your 1997 Chevy truck is located beneath the drivers side dashboard. The brake light relay switch will be above the brake pedal.

on the brake pedal lever.

The way i understand it is that the relay has the hot and the ground connected and when you press the brake the relay works like a toggle and completes the circuit.

That would be the relay for the "Center High Mount Stop Light", AKA the third brake light.