For 1990-2009 cars

### Circuit Description

The normally-open stop lamp switch supplies battery voltage to the ABS control module when the brake pedal is depressed.

### Conditions for Setting the DTC

Important: When DTC C0161 sets, the ABS control module will NOT disable the ABS, the TCS, and the DRP.

The DTC will set if the ABS control module detects an open in circuit 20.

### Diagnostic Aids

Inspect the wiring, the components, and the connectors for the following:

• | Proper connection

• | Backed-out terminals

• | Broken connector locks

• | Corrosion in the connectors/terminals

• | Burned, chafed, or pinched wiring

• | A broken wire inside the insulation

• | Loose components

• | Both brake lamp bulbs burned out

### DTC C0161