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Trailer Wiring Harness Recommendation for 2005 BMW Z4
Since a custom wiring harness is not available for your 2005 BMW Z4 2.5i e85, I suggest that you contact your local dealer to determine what type of tail light wiring is on your vehicle. Some vehicles use Pulse Width Modulation, which is a particular wiring system where instead of having a single wire for each different circuit, PWM will use the same wire for two or more circuits by using varying pulses for different functions. |
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