Standard Ignition Headlight Dimmer Switch,Turn Signal Switch DS-300
Standard Ignition Headlight Dimmer Switch,Turn Signal Switch DS-300 - view 2
Standard Ignition Headlight Dimmer Switch,Turn Signal Switch DS-300 - view 3
Standard Ignition Headlight Dimmer Switch,Turn Signal Switch DS-300 - view 4
Standard Ignition Headlight Dimmer Switch,Turn Signal Switch DS-300 - view 5
Standard Ignition Headlight Dimmer Switch,Turn Signal Switch DS-300 - view 6
Standard Ignition Headlight Dimmer Switch,Turn Signal Switch DS-300 - view 7
Standard Ignition Headlight Dimmer Switch,Turn Signal Switch DS-300
Standard Ignition Headlight Dimmer Switch,Turn Signal Switch DS-300 - view 2
Standard Ignition Headlight Dimmer Switch,Turn Signal Switch DS-300 - view 3
Standard Ignition Headlight Dimmer Switch,Turn Signal Switch DS-300 - view 4
Standard Ignition Headlight Dimmer Switch,Turn Signal Switch DS-300 - view 5
Standard Ignition Headlight Dimmer Switch,Turn Signal Switch DS-300 - view 6
Standard Ignition Headlight Dimmer Switch,Turn Signal Switch DS-300 - view 7

Turn Signal Switch for 1979-1983 Ford Mustang & More - Standard Ignition DS-300

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$68.99
MPN: DS-300
Item Package Quantity: 1
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Standard Ignition Headlight Dimmer Switch,Turn Signal Switch P/N:DS-300
Standard Ignition Headlight Dimmer Switch,Turn Signal Switch P/N:DS-300
$68.99

Keep your turn signals flashing and switch cleanly between high and low headlight beams with the Standard Ignition Headlight Dimmer / Turn Signal Switch DS-300. This combination switch bundles two jobs into one unit and installs as a direct-fit replacement for the listed applications — including the 1983-1989 Ford Ranger, 1979-1983 Ford Mustang, 1981-1984 Lincoln Town Car, and 1978-1983 Mercury Zephyr. It covers 24 Ford, Lincoln, and Mercury applications in all; see the Buyer's Guide tab for the full vehicle list.

  • Two switches in one: combines the turn signal switch and the headlight dimmer (high/low beam) switch in a single assembly.
  • Directional control: operates the left and right turn indicators.
  • Beam selection: toggles the headlights between high and low beam.

Signs the original may need replacing include turn signals that stop flashing on one or both sides, or headlights that will not switch between high and low beam. If a failed combination switch is the cause of those symptoms, the DS-300 replaces it; diagnose the cause first, since wiring, bulbs, or the flasher can produce similar issues.

Interchange: DS115 · UDS425 · DL6200 · D8BC13B302AA · D8BC13B302AB · D8BZ13341A · D9AC13B302AA · D9AZ13341A · E0AC13B302AA · E0AZ13341A · E5TZ13341AA · 12321673
Manufacturer part number DS-300 (also DS300).

This part cross-references / interchanges with the following part numbers:

DS115, UDS425, DL6200, D8BC13B302AA, D8BC13B302AB, D8BZ13341A, D9AC13B302AA, D9AZ13341A, E0AC13B302AA, E0AZ13341A, E5TZ13341AA, 12321673

Frequently Asked Questions

What does the DS-300 switch do?

It's a combination switch that operates your turn signals and, in the same unit, selects between the high and low headlight beams.

Which vehicles does it fit?

It's a direct-fit replacement for 24 Ford, Lincoln, and Mercury applications from 1978-1989, such as the Ford Ranger, Ford Mustang, and Lincoln Town Car. Check the Buyer's Guide tab for the full list.

What are signs this switch may need replacing?

Turn signals that quit flashing on one or both sides, or headlights that won't toggle between high and low beam, can be signs the switch is failing. Confirm the cause before replacing it.

What part numbers does this replace?

It interchanges with DS115, UDS425, DL6200, D8BC13B302AA, D8BC13B302AB, D8BZ13341A, D9AC13B302AA, D9AZ13341A, E0AC13B302AA, E0AZ13341A, E5TZ13341AA, and 12321673.

Why is it listed as both a turn signal and a dimmer switch?

On these applications both functions are built into one combination switch, so a single DS-300 handles the directional signals and the high/low beam selection.

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