Question about Cars & Trucks
I have spark fuel pressure and constant power to the injector
An "open" breaks a complete circuit - much the way a switch does. When the switch is "on" or "closed" the load should be powered. When the switch is "off" or "opened", power is interrupted and the load is not powered.
A "short circuit" is usually an unintended circuit that is completed without powering the load. Such would be the case if a battery jumper cable were to be crushed so that the copper conductors contacted each other. The amount of current would exceed the amount intended to be safely carried and if allowed to persist long enough - they would burn. A fuse is usually provides the protection in a circuit. If a fuse repeatedly opens or blows, there's a problem. Installing a fuse with a greater amp rating than the circuit is designed to pass is a dangerous fire hazard.
A "short circuit to ground" is where one side of a power source or battery is connected to a common point - in the case of a car, the (-) side of a battery is connected to the frame, chasis, body, etc.. Individual wires are used to pass the (+) voltage and amps to loads. If one of these wires were to be pinched or crushed between parts that are tied to the (-) battery cable, it has "short circuited to ground".
120/240 volt AC systems in homes consist of 3 wires. They are "hot" (black or red wires), "neutral" (white wires) called "grounded conductors" and the "grounding conductors" (bare or green wires). The grounding and grounded neutral are tied together in the meter socket, electric panel or elsewhere and bonded to the street side of the water meter. This makes all the plumbing, boiler, gas pipes, metal electric boxes, etc. to be at the same potential as earth or ground. Touching a hot black or red wire to a neutral white wire will cause a short circuit, and touching a black or red wire to a white neutral OR a bare or green ground wire would be a "short circuit to ground".
I hope this helps :-)
Posted on Apr 16, 2015
Means the load... injectors?, anything that requires electricity to work, is shorting out to ground, and since it is open, it is not creating a full circuit to the load, so the current is flowing back to ground before the load and the object in question will not work. electrical problems are so much fun..... also constant power to the injectors does not mean they will fire, if you have an open nuetral, or ground you will still see power but there is no way to complete the circuit, you are seeing the power because you are creating a circuit when you test..... i am assuming you are using a dmm or similar..
Posted on Apr 16, 2015
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Posted on Jan 02, 2017
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