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3.8. 

  

Activating components with a positive (+) voltage within the vehicle’s electrical system (fig.8). 

 

3.8.1.   

set the selection switch to ‘test’ position.

3.8.2.   

contact the probe tip to the positive terminal, the test indicator should illuminate Green. Whilst observing the test indicator, quickly  

 

press and release the power switch to the single bar ‘PositiVe’ position.

3.8.3. 

  

If the test indicator went off instantly, the unit has  been overloaded. This could happen for the following reasons: 

 

 

a) the tip’s contact went to direct earth.

 

 

b) the component has a short circuit.

 

 

c) the component is a high current component (i.e. starter motor)

 

‰

   WarNiNG!

 randomly applying voltage to certain circuits can cause damage to a vehicle’s electronic components. it is strongly    

  advised to use the correct circuit diagram and diagnostic procedures whilst performing this test.

3.9. 

  

Activating components with a negative(-) voltage within the vehicle’s  Electrical system  (fig.9).

3.9.1.   

set the selection switch to ‘test’ position.

3.9.2.   

contact the probe tip to the negative terminal of the component, the test indicator should illuminate red. Whilst observing the test  

 

indicator, quickly press the power switch to the double bar ‘neGAtiVe’ position and release it. if the indicator changes instantly from  

 

red to Green, you may proceed with further activation.    

 

3.9.3. 

  

If the indicator went off instantly, the unit has been overloaded. This could happen for the following reasons:

 

 

a) Where the tip of the tester has contacted is a direct positive voltage.

 

 

b) the component has a short circuit.

 

 

c) the component is a high current component (e.g. a starter motor).

 

‰

 

WarNiNG!

  With this function a vehicle’s fuses may blow when the probe tip is earthed in series with them.

3.10. 

cHecKiNG For baD eartH coNtacts

 

(fig.10).

 

3.10.1.  set the selection switch to ‘test’ position.

3.10.2.  Probe the suspected earth wire or contact with the probe tip. observe the colour of the test indicator.

3.10.3.  Press the power switch to the single bar ‘PositiVe’ position and release it. if the test indicator changes from Green to red, this is not  

 

a true earth. 

3.10.4.  i

f the test indicator turned off when the power switch was pressed to the single bar position, this circuit is more than likely a direct  

 

earth. Note that high current components such as a starter motor will also cause the test indicator to turn off during this check.

3.11. 

following and locating short circuits. in most cases a short circuit causes a fuse to blow. this is the best place to commence the fault  

 

finding process. 

3.11.1.  set selection switch to ‘test’ position.

3.11.2.  remove the blown fuse from the fuse box. Hold the probe tip against each of the contacts in turn whilst moving the power switch to the  

 

forward, single bar ‘POSITIVE’ position. The side of the fuse housing which causes the test indicator to turn off when the power switch  

 

is pressed forward is the shorted circuit. 

3.11.3.  m

ake a note of this wire’s identification code or colour. Follow the wire as far as you can along the wiring harness.

3.11.4.  locate the colour coded wire in the harness and expose it as much as possible.

3.11.5.  Probe through the insulation of the wire with the probe tip and move the power switch to the forward, single bar ‘PositiVe’ position to  

 

energise the wire. If the test indicator turns off, this wire can be identified as the shorted wire.

3.11.6.  c

ontinue testing the wire at each connector in the harness. The connector which causes the test indicator to turn off will lead you to  

 

the shorted area. Inspect the harness for signs of chafing or burnt out wiring and replace or repair as necessary. 

fig.8

fig.9

PPVt       issue 2 (H, f) 23/02/18

Original Language Version

© Jack sealey limited

fig.10

Содержание PPVT

Страница 1: ...se this tester for any purpose other than that for which it has been designed 2 Introduction Time saving tool ideal for the automotive electrician and mechanic Connects to the vehicle s own battery and reaches all corners of the vehicle with 5mtr cable Checks for shorts circuits and bad earths quickly and easily Tests continuity and polarity using flying lead and also indicates voltage 2V to 24V o...

Страница 2: ...t the selection switch to TEST position 3 6 6 Connect the auxiliary earth lead s clip to the negative terminal of the component to be tested Contact the probe to the positive terminal of the component The test indicator should illuminate GREEN indicating continuity through the component 3 6 7 Whilst observing the test indicator quickly press the power switch to the single bar POSITIVE position and...

Страница 3: ... EARTH CONTACTS fig 10 3 10 1 Set the selection switch to test position 3 10 2 Probe the suspected earth wire or contact with the probe tip Observe the colour of the test indicator 3 10 3 Press the power switch to the single bar POSITIVE position and release it If the test indicator changes from GREEN to RED this is not a true earth 3 10 4 If the test indicator turned off when the power switch was...

Страница 4: ...them as waste All tools accessories and packaging should be sorted taken to a recycling centre and disposed of in a manner which is compatible with the environment When the product becomes completely unserviceable and requires disposal drain any fluids if applicable into approved containers and dispose of the product and fluids according to local regulations Note It is our policy to continually im...

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