Heater switch
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Cross-Country
Joined: Feb 2015
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Heater switch
Hi Ford folks, can any of you good people help me with this question ?.
I am looking to fit a carter 6v electric fuel pump to my 1952 Ford f1, which is still 6v positive earth.
The 3 stage heater switch on the dashboard works okay, it powers the fan first click slow second click fast spin.
I don't need the heater as I am not going to use the truck in the winter, will it be possible for me to unplug the heater from the switch and reuse the switch as an on off switch for the new fuel pump ?, I know that the switch has a built in resister on it will this be a problem. ?
Thanks for your help
the gruffalo.
I am looking to fit a carter 6v electric fuel pump to my 1952 Ford f1, which is still 6v positive earth.
The 3 stage heater switch on the dashboard works okay, it powers the fan first click slow second click fast spin.
I don't need the heater as I am not going to use the truck in the winter, will it be possible for me to unplug the heater from the switch and reuse the switch as an on off switch for the new fuel pump ?, I know that the switch has a built in resister on it will this be a problem. ?
Thanks for your help
the gruffalo.
Logistics Pro
Joined: Sep 2014
Posts: 4,920
Likes: 21
From: Bothell & Silverdale, WA
Using the heater switch could be a potential problem because of three things: 1) You forget to turn the switch on. 2) You forget to turn it to the "fast" position. 3) You forget to turn the pump off. All of which require at least two cups of coffee to jog the memory. My suggestion (I've done this on my truck) is to use a quality normally open (NO) 7 psi pressure switch in the oil gallery combined with a dedicated fused circuit from the ignition switch. This allows the electric pump to start automatically after the engine starts, and shuts it off after the engine stops. It will also not allow the pump to run if the ignition switch is inadvertently left on. Takes the human error factor out of the loop.
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Hotshot
Joined: Oct 2009
Posts: 16,188
Likes: 4,796
From: Burbank, WA
Another good thing to add is an inertia switch that will shut off power to the fuel pump in the event of a collision. It's standard equipment on all new cars with fuel injection. You can find them by the dozens in any wrecking yard.
Logistics Pro
Joined: Oct 2014
Posts: 3,912
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From: Deerbrook, WI
I've been using my unused heater switch as an on/off switch for my rear view camera. It's worked fine, but I have a rebuilt heater that will get installed one of these days and then my heater switch will revert back to its intended use.
Jim
Jim
Elder User
Joined: Apr 2016
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Don't forget you should be able to power the fuel pump before the engine starts. Main reason for this is if the vehicle sits long enough between driving or running the engine the fuel in the carb will evaporate. The electric fuel pump will fill the bowl in the carb so the engine will start. A safe operating electric fuel pump circuit is little more involved. It should turn on when you turn the key to run position, shut off if the engine dies or you turn off the key, and like 52Merc mentioned shut off if you get in an accident to stop fuel flow.
Logistics Pro
Joined: Sep 2014
Posts: 4,920
Likes: 21
From: Bothell & Silverdale, WA
Don't forget you should be able to power the fuel pump before the engine starts. Main reason for this is if the vehicle sits long enough between driving or running the engine the fuel in the carb will evaporate. The electric fuel pump will fill the bowl in the carb so the engine will start. A safe operating electric fuel pump circuit is little more involved. It should turn on when you turn the key to run position, shut off if the engine dies or you turn off the key, and like 52Merc mentioned shut off if you get in an accident to stop fuel flow.
https://www.ebay.com/i/333186074296?...yABEgK5HvD_BwE
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