wire to fuel pump wire, fuse gets very hot

I rewired my fuel pump to pull power direct from the battery via a relay And in between the relay and the battery I have a 12 gauge wire fuse holder and the section between the fuse and the battery gets very hot (yellow/red wire)the fuse holder is very hot too the wire before and after the fuse are the exact same gauge the wire leading from the fuse to the relay is cold... odd, right? What can I do to fix this? I haven't found any blade fuse holders with wires that are 8 gauge or bigger I was thinking of the stereo tube fuse holders What do you guys use?? then I can use a 8 gauge wire what do you guys think?

Make sure the connection to the battery is crimped tightly, and make sure the fuse fits tightly on the left side of the fuse holder.  If it is loose, using a pair of pliers or a vice, with the fuse out of the holder, squeeze the holder to make the fuse fit tighter.   Resistance = Heat.  Since the wire on the other side of the fuse holder is the same size, there has to be a bad connection in one of the 2 mentioned locations.  Let's Go Brandon Brown. Congratulations on your first Xfinity Series Win. LGBFJB

i am an idiot wrote: Make sure the connection to the battery is crimped tightly, and make sure the fuse fits tightly on the left side of the fuse holder.  If it is loose, using a pair of pliers or a vice, with the fuse out of the holder, squeeze the holder to make the fuse fit tighter.   Resistance = Heat.  Since the wire on the other side of the fuse holder is the same size, there has to be a bad connection in one of the 2 mentioned locations.

Thanks! this is the best answer I've gotten (from the other forums, people have only suggested going to bigger wires, or shorter wire... yea that last one didn't make sense to me either)

I see those blade fuse holders do that quite often...I would recommend just to replace the fuse/fuseholder w/ maybe a mini-anl fuse and fuse holder...Stay away from the glass tube holders and fuses(agu)...Normally the solder in the tips of those glass fuses where the rod meets the cap in the inside of the fuse has the same issue and melts the fuse holder and eventually ruins the fuse...Maybe w/ a lower current draw the AGU fuse holder would be OK ...?Just what i have experienced....Bussman is a good company...! And of course you could always squeeze the female spades in the inside of your current holder...Be sure to look at the condition of the female spade in the holder also...Is it charred and lost its coating...? Another reason to replace if it is... Oh and if it is the connection at the battery...Dis-regaurd above...: )M.E.C.P & First-Class

Go slow and drink lots of water...Procrastinators' Unite...Tomorrow!

Just an update I put in one of these distribution block/fuse holders uses mini anl fuses (I bought this years ago, but forgot all about it and finally put it to use) also wired in my amp and carputer which cleaned up a bit of the wiring Ran the car for 30 mins, and wire is ambient temp :) Thanks guys!

Kim---- can you do this same operation for a 94 cadillac fleetwood???Fire310