Ok I have attempted creating a filter on the form. It is not filtering on the selected field that you choose. Whenever you choose a value and click filter all the records go away. The form name is 'Program Customer ModelYear'. Would someone please take a look at it and tell me what I'm doing wrong?
What you're trying to build is not a search form and the code you've used in your db is from Allen Browne's website but you've not left the credits.
See attached a working db.
I've not had a thorough look at your db but from the tables/queries that are related to the forms I was looking at, you have some fundamental issues:
1. Use of lookup fields in field level. Some of your queries and tables are a mish mash of the ID number or the related text. Lookups in fields (i.e. having a combo box in the field) should not be used and here's why:
http://access.mvps.org/access/lookupfields.htm
2. One or more of your tables is/are not related to anything when it actually should. Look into setting up relationships and referential integrity in the Relationships Designer.
3. Based on the points above I think your tables could be better normalised.
You'll benefit from creating a new thread asking for assistance on your table structure and setup.