Astro 7898 Deluxe Noid Lite And Gm Signal Test Lights Set 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. Product Features 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. Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!