Keep your brake lights firing the moment you press the pedal with the Standard Ignition Brake Light Switch SLS-389 (also written SLS389). This stoplight switch signals the brake lamps when the pedal is applied, and it drops in as a direct-fit replacement for the listed applications: the 2007-2008 Pontiac G3, 2009 Pontiac G3 Wave, 2005-2007 Pontiac Wave5, 2004-2005 Suzuki Forenza, and 2005 Suzuki Reno — see the Buyer's Guide tab for engine-level detail.
- Copper alloy conductors: deliver strong electrical conductivity with low resistive losses.
- Special-design spring & contact arrangement: reduces arcing to help extend service life.
- Brass or high-impact composite housing: built as specified for durable performance.
- 100% tested: verified for both mechanical and electrical switching performance.
Built with robust design and high-grade materials to meet the demands of today's service professional. If a failed stoplight switch is the cause of brake lights that stay off, stay on, or work intermittently, this replaces it — diagnose the circuit first to confirm the switch is at fault.
Interchange: SL2129 · SW4654 · SL939 · 3774085Z00 · 3774085Z01 · 3774085Z10 · 3774085Z20
This part cross-references / interchanges with the following part numbers:
Frequently Asked Questions
What does this brake light switch do?
It senses brake pedal movement and completes the circuit to activate the brake (stop) lights. It's a stoplight switch for the listed applications.
Which vehicles does the SLS-389 fit?
The 2007-2008 Pontiac G3, 2009 Pontiac G3 Wave, 2005-2007 Pontiac Wave5, 2004-2005 Suzuki Forenza, and 2005 Suzuki Reno. Check the Buyer's Guide tab to confirm your vehicle.
What numbers does this switch cross-reference?
It interchanges with SL2129, SW4654, SL939, 3774085Z00, 3774085Z01, 3774085Z10, and 3774085Z20.
What are signs the switch may need replacing?
Brake lights that won't turn on, stay on, or work intermittently can point to a failed switch. Diagnose the circuit first, since other causes are possible.
Is this switch tested before shipping?
Yes. These stoplight switches are 100% tested to verify both mechanical and electrical switching performance.
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