Part shows to be for a 92 crown vic/marquis.
They used the inertia switch in the actual power feed to the pump, not with a relay. I have seen the inertia switch used to control the relay coil on mustangs, not sure why. But the part number would be different. Not sure if it would be a lighter set of contacts on the pony car part verses the one you have.
You should be fine to use it in the power feed to your pump.

 

Thank you for your reply. I got three of these at the local U-Pull-It, one from a Ford Ranger, and two from Explorers, and they all had the identical part number. Looks like I can skip the relay.

 

Why would you want one?

Brian

 

Seems like a simple way to add a bit of a safety factor in the event of a collision. Maybe overkill, but Ford must have thought it was a worthwhile idea.

 

Federal regs.

Federal regulations specify how much fuel can leak after a test crash. turning off the electrical fuel pump is a good idea. Remember the original ALA KART Fire.

 

It just seems like overkill to me. But what the heck, if you are running an electric pump anyway it's easy enough. There are other ways too, like having it running thru an oil pressure sensor so when the engine isn't running the fuel pump isn't either, there are cars made that solve the problem that way.

Just be sure to have that inertia switch in the same exact attitude as it was on the car you took it off of.

Brian

 

These switches became Federally mandated after EFI and high pressure electric fuel pumps became the norm to shut down the pump in a vehicle upset as two major conditions exist with these in that the engine may not shutdown and if a fuel line is ruptured with 40 to 60 psi behind it a lot of raw fuel quickly gets pumped out of the tank and into/onto the scene. Ford more than anybody should know about fuel fed fires after an upset or accident, every vehicle sold since EFI has one of these somewhere in some configuration.

Many racing sanctioning bodies have required these on vehicles permitted to run electric fuel pumps as well. The learning curve includes several people who survived the crash only to be burnt to death before they could get out. Even with mechanical fuel pumps these gadgets can be used to kill the ignition to ensure the engine is shut down following a crash.

Like packing heat, it only takes that oneth time to make it worthwhile to drag it around.

Bogie

 

Just finished installing the switch. Hopefully it will never be needed, but who knows?

 

I put one of these things in my 59.
Wired it to the ground circuit of the relay.

Ignition power to the relay coil >>>>>>>>relay coil to Taurus inertia switch>>>>>>inertia switch to ground

 

I would be worried I'll crash and not be able to make a quick getaway.

 

Oldguy48, wanting to do the same thing. Do you know the location of this switch on an Explorer?

 

If I remember correctly, it was mounted behind the kick panel, on the passenger side.

 

The fuel system now has another point of failure, switch goes open.

The good, it is easily accessible as seen mounted.

Pep

 

On my T-bucket, I had it wired to shut the MSD box off. The fuel pump was on an oil pressure switch. I read about a couple of accidents where T-buckets got squirrely (which they will do sometimes due to the short wheelbase/high power to weight) and jumped curbs or medians. It was just my way to prevent total loss of control.

T's can be a real handful. You always have to be aware of whether the road has water or sand or dirt on it. They can swap ends with you quick. Mine drove like a stock car most of the time, but I did spin it once right after I first started driving it. I learned to pay closer attention to road conditions after that.

 

On my F-150, it is on the drivers side under the dash on the firewall. Some F-150's are in the center under the dash.

When I put the 5.0 HO out of an LSC in my 65 P/U, I went ahead and mounted the inertia switch on the passengers side kick panel as that is where the wires reached. And yes they go between the relay and the pump, so they handle the full output. I have only seen 1 fail ever, so they are pretty dependable. I think that it's a good safety feature.

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