9038A Relay Bypass Switch & Diagnostic Tester Tester Kit with Amp Loop 6-Pack US Tips: The Compatibility Chart is only for Reference. Please repeatedly confirm your original part and part number with ours to make sure it’s the right replacement for you. Part Number: 9038A Features & Details: 1. Wide Compatibility – 9038A relay bypass switch kit Compatible with Japanese, Korean, and German vehicles like GM, BMW, Audi, and Chrysler. Fits most fuel pumps, cooling fans, window motors, headlight switches, air conditioning compressors and other devices using automotive relays 2. Precise & Independent Control – This relay switch kit allows for independent control of the relay circuit via an ON/OFF switch, enabling precise control of various car components and saving a lot of time 3. Curr.