This question shows what I’m not sure of. I think I know the answer, want to hear it from people that know TONS more than me about auto electronics. Here goes, I’m installing a Lokar LED shift indicator. It says to use a 15 amp circuit. Ignition hot. Is it ok to use a 20 amp or should I put in a 15 amp fuse. You can stop laughing now, I’m learning this stuff as I go. I couldn’t believe what all is involved in this install. Install a special nut and cable arm on the trans arm, run a cable to the right side of every GM transmission except a 400, to a sensor box that you mount to the trans pan bolts. Then you hide they’re ( secret) decoder box. I put mine in the glove box. They have every position where every wire is to be attached ( thank God) well labeled. Theres about 15 different wires depending on your trans to connect to the decoder box. I’ll be wiring into the box and testing today. That’s why I’m asking the amp question.