What about a Crash Relay for Electric Fuel Pump

[chevynut]

Complicated stuff I don't need or want on a hot rod.

Complicated? It's a simple little inertial switch that turns a relay to the pump off. Lots of new cars have one for safety reasons and I hope mine is never activated. If it has the potential to prevent my car from completely burning up, it's going in.

But I suppose you're still running a carburetor with a mechanical fuel pump that OEMs abandoned almost 3 decades ago in favor of a much better fuel delivery system. EFI used to be an "option", now you can't even buy a car with a carb.

[chevynut]

thought it to be a good idea but my fuel pump is already on a separate relay.

You should be able to wire the crash switch into your current relay. Just put it in series with the coil of the relay....all it is is a contactor so when the pump is running it's like it's not even there. No need to even add another relay, imo. Let me know if you can think of a reason this won't work.

Ron Francis says to put his setup "close to the pump". I don't see why or how that helps. The pump wire goes from the pump relay to the pump in any case. I think I'm going to put mine under the console with all the other electrical stuff, and close to my pump relay.

[markm]

Anyone can run a simgle carburetor it takes more talent to run multiple one like I do.

[Rick_L]

Let's see a photo of the talent meter and then prove it's yours, LOL.

[Bihili]

You should be able to wire the crash switch into your current relay. Just put it in series with the coil of the relay....all it is is a contactor so when the pump is running it's like it's not even there.

When I read the Ron Francis instructions it says: the crash sensor is connected to the ground wire of the relay.
Would you agree with that?

[chevynut]

When I read the Ron Francis instructions it says: the crash sensor is connected to the ground wire of the relay.
Would you agree with that?

I don't see why it makes any difference which side of the relay coil it's on. All it does is break the circuit to disengage the relay. Either way the same small current runs through it.

[chevynut]

Well I found a Ford crash sensor and pigtail so I am thinking of mounting it in the trunk.
I assume the red reset button needs to be pointed up.

Yup, mine says "Ford" on it too. But I didn't get the pigtail with it. What kind of connector is it? It has big contact pins so it looks to me like it could be used without a relay. Also, it has 3 pins...what's the third one for? Maybe an indicator light?

[chevynut]

[Bihili]

The eBay crash sensor switch arrived. Made by Ford.
Mine has a two wire pigtail and the device looks fairly simple.
Tap the device and the reset button pops up.
Sounds like a round ball rattling around on the inside after it is tripped.

I am planning to install near the existing fuel pump relay with the reset button pointing up.

Mine came from a cheaper car (Festiva) so probably did not have a dash light therefore only two wires.

[chevynut]

I was wondering what one of these things would do with a jolt from a hard shift. Are you going to put it in the power wire or the relay coil wire? I think it would work fine either place.

Do you have a pic of the connector? I should have thought about the pigtail.