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Trailer Tow Relay

Towing

Controls the power supply to the trailer’s electrical system, ensuring proper operation.

The trailer tow relay manages the flow of electrical current to the trailer’s lights, brakes, and other electrical systems, ensuring they receive power from the vehicle’s electrical system during towing.

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Typical part cost
$20–$60🔒
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Typical labor cost
$50–$100🔒
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DIY difficulty
3/10

⚠️ Owners Often Notice

If the Trailer Tow Relay is starting to fail, these are the signs owners most commonly report before it gets worse:

Trailer lights not working
Trailer brakes not functioning

Related Services

Services commonly performed on or around this part.

Replace Trailer Tow Relay

No standard interval on file

Inspect Trailer Tow Relay

No standard interval on file

Test Trailer Tow Relay

No standard interval on file