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Headlight Relay - Full Kit - NEW ~ 1969 - 1973 Mercury Cougar / 1969 - 1973 Ford Mustang

Item #: 10500
Cost: 15200
Earns: 760
Bonus: 0

Price: $190.00
    The product is in stock Availability*: In-Stock Item
    Usually leaves warehouse: Next Business Day
    In-Stock Item Quantity: 1
    In-Stock Item - Ships in: Next Business Day

    Converting your headlight wiring to a modern relay type is probably one of the best 'bang for the buck' mods you can do to your classic car. A must when using modern halogen bulbs, it will also brighten your original incandescent headlights.

    Normally this is done by cutting the main wiring harness and splicing in a pair of relays. Most of us try to hide the relays under or behind something as well. Not only is this a time consuming task, it can be troublesome if a connection or component fails and you have no lights!

    This relay kit can be installed in less than 1 hour without cutting your harness. Not only that, it can be easily removed for shows or if it should ever fail. The kit also has built-in redundancy that virtually guarantees that you will never be in the dark.

    These kits were originally developed for 67-70 Cougars and Mustangs but will also work on most Ford Motor Company vehicles produced in the 60s and 70s without modification

    This Relay Kit has everything that the mini kit has, but where as the mini kit is designed to handle 4 - 50W bulbs, this kit can handle the higher wattage bulbs (up to 4 - 100W) used outside of the USA.

    Included in kit: Two weatherproof controllers, one 40A auto-reset circuit breaker, power wire, crimp-on connectors and easy to follow instructions.

    Benefits:

    • Easy to install, and no cutting. Plug in the controllers, run a power feed and you're done.
    • Redundancy. Each headlight - High, Low, Left, Right has it's own relay and each side has it's own controller.
    • Each 40/60 Amp 12 Volt sealed relay has Negative Spike Protection built in. This means no spikes or feedback to upset delicate electronics.
    • Each controller contains an internal auto resetting circuit breaker to isolate left and right sides.
    • If a controller goes bad, the other controller will continue to power the other side.
    • The single feed wire is easily hidden and the controllers can be removed for car shows if desired.
    • Compact size - each controller is only 3"x2"x1.5".
    • Kit comes with a 40A auto resetting circuit breaker to power up to 4 halogen lamps at 10A each. 
      *Note: It is the responsibility of the purchaser to ensure that the headlight wiring is sufficient to carry the amperage required by the installed lamps.

    Recommended bulbs: Direct replacement halogen bulbs are available from most car parts stores as #5001 (low beam - outer) and #5006 (high beam - inner) for 4 headlight systems

    Shipping Weight:
    1.00 LBS
    (weight shown may be the dimensional weight)
    Shipping Dimensions:

    Headlight relay installation instructions

    Number of questions: 1
    0 0
    Are installation instructions included with the kit?
    Tone Motorsports December 10, 2025 7:01 PM
    Answers
    0 0
    Yes.
    WCCC Support Staff (Junior) December 11, 2025 9:06 AM

    Why am I being warned about potential exposure to chemicals in motor vehicle parts?


    • Some chemicals in motor vehicle parts are on the Proposition 65 list because they can cause cancer and/or birth defects or other reproductive harm.
    • When purchasing USED or NOS items, we do not know if listed chemicals are present in these products.
    • This product is known to contain the following listed chemicals:

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