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Wiring A 12V Fuel Lock


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artistwantab 
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Location: California, United States
Posted: November 03, 2021 at 9:24 PM / IP Logged Link to Post Post Reply Quote artistwantab
Hey guys,
I am building a custom RV and I purchased a 12v fuel lock that I had intended to simply put an on/off switch on.
After I found this forum looking for help installing my Viper alarm I realized this is exactly the place to help me install the fuel lock exactly how I would like.
For safety reasons I would like to turn on the fuel lock as soon as the ignition is turn on.
I understand how to wire most automotive things but no even sure where to begin on something like this but I love to learn.
Regular ignition but I am hoping to install an auto-Start feature.
2005 Mercedes Sprinter
i am an idiot 
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Location: Louisiana, United States
Posted: November 04, 2021 at 8:57 AM / IP Logged Link to Post Post Reply Quote i am an idiot
What is a fuel lock? Year make and model of the vehicle?
Let's Go Brandon Brown. Congratulations on your first Xfinity Series Win.
Custom_Jim 
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Joined: November 28, 2003
Location: Missouri, United States
Posted: November 04, 2021 at 10:43 AM / IP Logged Link to Post Post Reply Quote Custom_Jim
Are you wanting to run something like this:
Wiring A 12V Fuel Lock -- posted image.
https://www.amazon.com/Electric-Solenoid-OVERHEAT-RESISTANT-re-engineered-Normally/dp/B007N0GRIE
This looks to be a 12V normally closed valve that when 12V and ground are applied to it the valve opens allowing flow through it.
If so I really doubt the valve takes that much power to operate so one of the two wires of the valve probably goes to ground and the other wire could go to a toggle switch and then to an ignition 12V source but wherever the source of power is from maybe add an inline fuse to protect the wire ?.
Is this going into a 2005 Sprinter ?
Jim
1968 Chevy II Nova Garage Find 2012
1973 Nova Custom
1974 Spirit of America Nova
1973 Nova Pro-Street
1977 Nova (Sold)
artistwantab 
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Posted: November 04, 2021 at 5:28 PM / IP Logged Link to Post Post Reply Quote artistwantab
Here is the one I chose
Wiring A 12V Fuel Lock -- posted image.
What I would like it to do is have it shut off when I turn the car on.   I don't want to accidentally leave it open when driving.
I would then like to add a switch in the cab to turn it on when needed.
Yes a 2005 sprinter conversion
2005 Mercedes Sprinter
Custom_Jim 
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Posted: November 04, 2021 at 5:55 PM / IP Logged Link to Post Post Reply Quote Custom_Jim
I thought you might be using it as a theft device to where the one I linked to is normally closed so no flow can happen through it but then when the key is turned on and the toggle switch is turned on, the solenoid opens allowing flow through it to something like a carb or fuel injection setup.
While I'm on my way home and didn't look real close at your valve, it sounds like you need a normally open flow valve and then when driving when ignition power is sent to the valve, the valve closes. Normally too there is an accessory circuit in a car that would allow power only when the key is in the run and accessory position and dead at all other times while an ignition source of power will only have power present when the key is in the run and crank position and dead in all other key positions.
When you said you want to be able to turn it on when needed, would this be with the key off ?
Jim
1968 Chevy II Nova Garage Find 2012
1973 Nova Custom
1974 Spirit of America Nova
1973 Nova Pro-Street
1977 Nova (Sold)
artistwantab 
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Posted: November 04, 2021 at 6:21 PM / IP Logged Link to Post Post Reply Quote artistwantab
The one I purchased is normally closed.   
Normally open wouldn't work because I don't need it on when its not in use also.   
In my rig propane is only for the water heater, stove and generator.    So I want to be able to turn if off just when not in use in case I have a leak.   For example, at night.   
Just want to wire into the ignition somehow so if I forget it on it shuts off.
Thanks again for your help.
2005 Mercedes Sprinter
Custom_Jim 
Copper - Posts: 196
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Location: Missouri, United States
Posted: November 04, 2021 at 8:53 PM / IP Logged Link to Post Post Reply Quote Custom_Jim
No problem for the help. Just make sure the valve can handle the pressures, check for leaks, and do things safe. You don't need to fill up an area with raw gas that a spark could light up.
Jim
1968 Chevy II Nova Garage Find 2012
1973 Nova Custom
1974 Spirit of America Nova
1973 Nova Pro-Street
1977 Nova (Sold)
artistwantab 
Member - Posts: 13
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Joined: January 05, 2019
Location: California, United States
Posted: November 04, 2021 at 9:06 PM / IP Logged Link to Post Post Reply Quote artistwantab
Sorry error - Double post...can't delete
But still in need of how to wire it.
2005 Mercedes Sprinter
artistwantab 
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Posted: November 06, 2021 at 9:48 PM / IP Logged Link to Post Post Reply Quote artistwantab
Hey guys!
Well I made my first attempt at wiring a relay from scratch.   I am not an engineer or electrician (my talents lie elsewhere)but I can normally reverse engineer anything.   
Any help is greatly appreciated!
Wiring A 12V Fuel Lock -- posted image.
2005 Mercedes Sprinter
artistwantab 
Member - Posts: 13
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Joined: January 05, 2019
Location: California, United States
Posted: November 07, 2021 at 6:55 AM / IP Logged Link to Post Post Reply Quote artistwantab
Actually I think is correct?
Wiring A 12V Fuel Lock -- posted image.
2005 Mercedes Sprinter

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