My truck is having some kind of electrical problems. the mfi relay was getting hot, so they replaced it.Now my check engine light blinks like a flasher when it wants too. The lights will blink off with truck running or not. sometimes it won't crank and you can wiggle the fuses and relays under hood and it will crank. I would like to change the fuse box but don't know where to buy one. Anyone else have these problems. that may not be the correct name of the relay but it's something like that. Thanks for any help.

 

double check all electrical ground wires.