Astro 7898 Deluxe Noid Lite And Gm Signal Test Lights Set Product Details Astro Pneumatic's deluxe noid lite and GM AC signal test lights set quickly and easily checks for systems on GM TBI, Bosch PFI, Ford TBI, GM PFI, Geo PFI and GM SCPI. To test, just disconnect the fuel injectors, plug the Noid Lite into injector wiring harness, then crank the engine. Most economic way to check electronic fuel injection (EFI) signals Normal voltage is indicated by a flashing light visible from passenger compartment Blow molded case keeps the tools organized and easy to transport Blow molded case for storage. Weight 1.5 lbs. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.