cig lighter and code port on same 25 amp fuse?

That is a very big fuse, should only be a 10 or 15amp fuse. Get several of these that people put misc. coins, etc. that get into the lighter plug and short the fuse. Also some have been used so much the plug is shorted. Unplug the power to the lighter socket or clear the debris in the socket and retry scan. Use a smaller fuse or circuit breaker.

the check engine light is on and my scanner won't connect keeps asking is key on I check all fuses can't find any blown