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Hello, my name is***** pin 15 of cluster there is a gray/white wire which should have power when hi beams are on. This wire splices in with hi beam wire. On pin 16 the black wire should have ground at all times which is for the indiator bulb. If both are good replace cluster because circuit failed. Depending on if power/ground is missing you may need to run a new wire. Here is a wire diagram so you can see how system works. Let me know if there is anything else I can do to help. Thanks.