why not just run the wire to the fusebox in the dash and use a fuse splitter then you can run the seat power on its own seperate fuse so you can use whatever size you need? They sell the splitter at autozone or advance for like 2-3$ it plugs in somewhere you have a fuse and makes it into two with a pigtail of wire coming off to run another fused power from the same source without drawing from the source thats already there ive been doing this with my gauges.
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