[rokob]

You can. Refusing the field test allows them to arrest you. But it isn't sufficient to charge you. They also have to offer you a breathalyzer at the station and you can refuse that but demand a blood test.

But your car still gets towed even if you pass the tests at the station and don't ultimately get charged because you refused the field test.

[beart]

In Michigan, refusing the roadside breathalyzer is $150 automatic fine. Refusing the chemical test once at the station is an automatic 1 year suspended license and 6 points, even if you are subsequently let go without charge.

[rationalist]

What if you don't refuse, but just barely blow into the device or otherwise have a medical condition such as asthma that prevents the machine from getting a good sample?

[beart]

Not sure what the law is exactly, but I'm pretty sure that doesn't end up working out in your favor.