Transfer Fuel Tank Wiring

[Boss .300 winmag]

Bought a transfer fuel tank and pump last summer finally got around to putting it all together yesterday.

In the wiring instructions it call for a in-line fuse, I never seen fuses on all the ones I’ve used in construction.

Is it really needed? It won’t be hard wired in ever to the truck, after I put on my flat bed later this year I’ll run the wires to the battery but will always connect it when used with alligator clamps.

[syoungs]

I wouldn't put an inline fuse in if I was doing what your doing, but the correct way to do it does include an inline fuse. If the motor of the pump gets damaged, it can draw more current then the wiring can safely provide, which causes heat/fire. not a great situation for a fuel pump to have red hot wires running to it.

[CP]

A fuse is cheap insurance.  Yes, you should put one in.

[Sandberm]

I used mine so infrequently and never bolted it in the pickup, just slid it in for brief periods of time when i needed it.

Its ghetto but... I just popped the hood, hooked some jumper cables to the trucks battery and then the other end to the pumps wires. Never fused. 

That answer really doesnt help I guess 

[Boss .300 winmag]

A fuse is cheap insurance.  Yes, you should put one in.

Ok which ground system does a 2004 Ram Cummins have?

[CP]

A fuse is cheap insurance.  Yes, you should put one in.

Ok which ground system does a 2004 Ram Cummins have?

Negative ground.

[Boss .300 winmag]

I used mine so infrequently and never bolted it in the pickup, just slid it in for brief periods of time when i needed it.

Its ghetto but... I just popped the hood, hooked some jumper cables to the trucks battery and then the other end to the pumps wires. Never fused. 

That answer really doesnt help I guess 

I’m not that ghetto, I grounded the pump to the bed with supplied ground, and used the wiring that came  with the pump installing alligator clips on it.😉

[Boss .300 winmag]

A fuse is cheap insurance.  Yes, you should put one in.

Ok which ground system does a 2004 Ram Cummins have?

Negative ground.

Thanks.

What system would use a positive ground?

[Stein]

I think many tractors use it as well as some old cars are positive grounded.

[wadu1]

A fuse is cheap insurance.  Yes, you should put one in.

Ok which ground system does a 2004 Ram Cummins have?

Negative ground.

Thanks.

What system would use a positive ground?

Most cars prior to 1955 or so were positive ground, and many had 6V batteries. My first truck was a 55 Chev, 6V positive ground. Dad and I changed it to 12V negative ground, boy did that starter run fast.

[KFhunter]

You can put the fuse on the pos wire, if you put it on the neg wire it could still be grounded through the pump housing, through the bung, through the tank,  through contact with the bed/body in the event of a short out.

Put fuse just behind the aligator clip, on the red pos wire. That way the whole length of the pos wire is fused, incase it gets pinched or something.

[dyhardhuntr]

If it was me I would put in a fuse as it is cheap insurance. I would also put it on a switch inside the cab. That’s how I wire all of my company work trucks. I add the switch so someone can’t come along and steal the fuel. Fuses are so cheap and it could save you from an expensive mess. You could run the ground wire to somewhere on the frame between the bed and cab. I’d also use a 2 prong weather proof connector to help avoid corrosion.


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[Ridgeratt]

Looking at your diagram I would call it a anti spark bonding strap. A safety strap that would protect the fuel cell from an unpleasant result from a spark.

[highcountry_hunter]

Another vote for putting an inline fuse in. Just cheap insurance, they cost about 5$ and will take you 2 minutes and 2 butt connectors to install.

Also on the positive ground comments, Mack trucks also use a positive ground although they may have changed in recent years. Just one more reason not to buy a *censored* Mack lol