General Troubleshooting Steps for Dependent Dropdown Lists

Here are some general troubleshooting steps you can follow if you’re having issues with dependent dropdown lists:

Clearly name your fields and lists to avoid confusion, for example Vehicle Make (List) vs. Vehicle Make (Record).
Walk through field type, source, order, filtering setup, and test with verified data.
Temporarily disable client scripts or workflows during troubleshooting.
If stuck, resave all fields and the record type, then refresh your browser.
Before updating production, try the setup in a sandbox first, especially if there are lots of dependencies.