PhantomSky2

New here....just bought a 94 F150 4x4 300 5-speed for a winter vehicle as I ride my motorcycle mostly in the summer and to haul a boat im inheriting.

Been slowly going through the typical maintenance (Seems like no one has touched any of it on this truck in its life) when I came across this...

The dangling part is the relay with a general fuse taped to it and if I wiggle it I can hear the relay clicking like crazy a couple times. I tried removing the extra wires and just plugging the relay back in but then my fuel pump wouldnt work so I put it all back together and now the truck has trouble starting for the first few cranks.

Help would be appreciated.

kd3pc

sounds as if something is loose or burned in the fuse/relay block and those stake-ons are taking up the slack/looseness.

Not sure why he would have a real fuse there? But if the relay clicks, something is loose or the relay is bad.

Make sure the connections are tight and clean, then make sure the pins follow the relay plug to relay socket exactly.

bug light or volt meter may help you know for sure, or narrow down which wire/connection is wobbly.

PhantomSky2

It seems to only work if you have it plugged in a certain way... I tried a dif relay from the junkyard and no good....

kd3pc

you might check for similar wiring (miswiring) elsewhere in the electrical.

Not sure what you mean by plugged in a certain way? The relay only works in one position relative to the socket, assuming it is the correct relay part number.

JUnkyard relay may or may not be any good, you would need to ohm-meter it out to see if it is making and breaking correctly with and with out power.

24willyboy

I think he means it only works with the jumper wires everywhere. I'd say maybe get a fuse block from a junkyard and swap them out? That's about the only thing I could see it being, is a bad block that's loose as mentioned above. Unless possibly they wired the fuel pump up to a different socket and are using the jumpers to get power from one socket to another?

Chris_1

iTrader: (1)

Looks like a bad connection underneath. That whole power distribution block come apart so you can turn it over and see the connectors and wires underneath.

PhantomSky2

Kinda what I was thinking...do you have to take out all the fuses and relays to do that? its just kinda sitting in there... I was trying to see under it but stopped in fear of breaking more stuff.

Chris_1

iTrader: (1)

The box unclips from it's bracket and then the bottom cover unclips from the main box. You can turn it over and look under with all the relays etc. still in it.

Chap150

Chris, just for reference, here's a nice break out of the fuse box and what goes where.

http://i11.photobucket.com/albums/a1...ibution007.jpg

Chap

PhantomSky2

I havnt had a chance to look under it yet but Im a little confused why the powertrain relay would effect the fuel pump?