Dual Tank Wiring Not Working With Truck Current Supply

[RamonMartinez]

Morning Gentleman.

I have an issue while wiring my dual tanks.

Valve does work when supplied with current from a 12V drill Battery.
But once i plug it to the truck supply it , Valve Does not Actuate or do Anything.

i don't understand why, such diagram seems very simple to me. Grounding is correct .

I have litle knowledge on electrical matters but i've been learning on this build.

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[WP29P4A]

Are you trying to go with the plug and pray method? Or are you using a meter to verify voltage?

 

[RamonMartinez]

Plug and Play, ill get a meter. but honestly dont have idea how to use it.