The best way to start troubleshooting any electrical problem with your fourth generation (2016, 2017, 2018, 2019, 2020 & 2021) Mazda MX-5 Miata is to check for a blown electrical fuse or a faulty relay in either the engine bay or interior passenger compartment electrical panels. To view my DIY tutorial for the procedure, click on the text link or thumbnail image below.
2016-2021 Mazda MX-5 Miata Electrical Fuses Replacement Guide
