Wiring Harness Wire
18
Jun/090
Jun/090
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Can a partial short to chassis ground in a wiring harness cause a partial voltage drop, 12 to 9.6V, at its end?
. . . or, can it only cause a loss of amps delivered to the end of the wire in the wiring harness? The voltage drop being seen in this case is constant.
The GM wiring diagram says 12 V DC should be at the sensor's power input, but there is only 9.6 V DC there. This is a 20% drop, enough to affect the voltage output of the sensor itself.
There is no such thing as a 'partial' short. It's either shorted or it's not.
Voltage drops can be caused by corrosion, resistive wiring or a load between the source voltage and ground. Those type of problems will show a consistent voltage drop whereas a short will show a drop to zero right before your fuse blows or you wiring burns.
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