fuel pump fuse

[NOLAsc]

I blew my fuel pump fuse for the second time in a couple of months. Anybody have any ideas of what might cause this? The wire seems a bit cooked going into the fuse. The fuse actually blew/broke down at the upper connector -- not in the middle of the fuse.

I'd appreciate any suggestions as to what to do now.

FWIW... I've changed the relay and the fuse. The first time, I used my unused a/c relay. The other night, I put that new red relay in.

[HawgRyder]

If there is resistance in the circuit, you get a heating effect.
So....any poor (resistance) connection will heat up and therefore get more resistance, until it burns (like a light bulb).
In your case...by the pix...I would cut back the wire until you get to shiny metal...and reconnect to the fuse holder after cleaning the heck out of it or replacing the metal part of the holder with a better one.
At the very least...take the screw out of the holder and polish the end that touches the wire.
Remember...if you are not willing to lick the end of the wire...it's not clean enough!! ( you don't have to really lick it...but you get the picture).
Good luck
Bob

[wwest]

While the average current drawn by the fuel pump is well within the fuse rating it has a HUGE surge current. Over time that results in heating of the fuse contacts enough that they lose their "springiness", ability to tightly grip the fuse ends.

The simplest fix is to substitute a separate fuseholder, by-passing the one on the fuse block.

On our '78 Targa I used a barrel/cartridge type purchased at Radio Shack.

[NOLAsc]

Thanks for the replies. Judging by my inability to budge the screw -- even after soaking with PB blaster -- I'm probably looking at the separate/by-pass fuse holder.