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Level 12

Solenoid Testing


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Pull Down, Closed
For a 1 wire switch eg oil pressure. Plug out; if it reads 12V then it’s a ___ ___ type where the housing is earthed. Plug in; if it reads 0V then we know that the switch is normally ___
Internally, 12, 0
Pull down switch - Voltage to switch is ___ sourced. With switch open signal voltage remains at ___V, with switch closed signal voltage goes to ___V
Externally, 0, 12
Pull Up switch - Voltage to switch is ___ sourced. With switch open signal voltage remains at ___V. With switch closed signal voltage goes to ___V
Pull Down, Pull Up
Identifying Switch : Follow wire that doesn't go to pcm, if its to ground then it’s a ___ ___ switch, if its to power then it’s a ___ ___ switch.
PCM, Control
For solenoid control, follow the wires to see which doesn't go to ___, then deduce the ___ signal wire
PCM, Power
When a solenoid is wired directly to the ___, they tend to be ___ side switched
In, Low
KOEO - plugged ___ solenoid, both pins will look the same using test light, as the solenoid resistance is too ___ to create enough of a volt drop to dim the light.
Power, Out, Ground, 12V
KOEO - Both wires read 0V on a ___ side switched solenoid. Plug ___ solenoid, use test light to check for ___ wire, the other wire is our control. Activated by supplying ___ to our control wire
Ground, 12V, 0V, Ground
KOEO - Both wires read 12V on a ___ side switched solenoid. Plug out solenoid, use test light to find the ___ wire, other wire should read ___, this is our control. Activated by supplying ___ to control wire
0.5, Jumper Cable
Solenoids that need more then ___ amps we use a ___ ___ instead of a test light.
Wrong Polarity, Bulb
Connecting to the ___ ___ with out test light will not harm our computer due to the resistance of the ___
Current Draw, Series
We can determine test light ___ ___ by connecting it in ___ with an ammeter
0.2, Drivers, Overload
A test light must draw more then___ amps to energise most solenoids, but can test computer transistor ___ and relay coils so to not ___ the computer by drawing too much current.
Test Light, Computer, Current
Testing Solenoids : Using the ___ ___ as a jumper protects the ___ and also shows the flow of ___