Standard Ignition Headlight Dimmer Switch P/N:DS-78
Standard Motor Products
Keep your low and high beams switching on command with the Standard Ignition Headlight Dimmer Switch DS-203. It toggles the headlights between low beam and high beam. It fits many vehicles as a direct-fit replacement for the listed applications, including the 1987-1995 Jeep Wrangler, 1987-1993 Jeep Cherokee and 1977 Chevrolet Impala.
See the "Vehicles it fits" section for the full list of vehicles and engine details.
Signs a dimmer switch may need replacing include headlights that won't change between low and high beam, a beam that stays off, or lights that flicker when the switch is moved. If a failed dimmer switch is the cause, the DS-203 replaces it. Diagnose the circuit first, because bulbs, fuses and wiring can cause the same symptoms.
Interchange: DS144 · 56003406 · J3239703 · J8134498 · UDS485 · DS150 · 26035237 · 7819567 · 7829781 · 7830217
This part cross-references / interchanges with the following part numbers:
What does a headlight dimmer switch do?
It switches the headlights between low beam and high beam when you operate the dimmer control. The DS-203 replaces this switch on the listed applications.
What are signs the dimmer switch may need replacing?
Possible signs include headlights that won't change between low and high beam, a beam that stays off, or lights that flicker when the switch is moved. Check bulbs, fuses and wiring first, since they can cause the same symptoms.
Which vehicles does the DS-203 fit?
It fits many vehicles, including the 1987-1995 Jeep Wrangler, 1987-1993 Jeep Cherokee and 1977 Chevrolet Impala. See the "Vehicles it fits" section for the full list and engine details.
Is the DS-203 tested before it ships?
Yes. Standard Ignition states its parts are 100% tested to verify both mechanical and electrical switching performance.
What are the switch's conductors made of?
The DS-203 uses copper alloy conductors, which are designed for superior electrical conductivity with low resistive losses.
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WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.