Page 139 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

10 Check the head light brightness. If head light brightness is dull, battery may be down.

11 Start the vehicle, if it is not started but slow cranking happens, battery may be down. While starting head lights
gets `off and then come back again, the battery charge is less. A rapid clicking (almost like a machine gun
sound) from the starter means there’s not enough power to engage it as well.

12 Switch off headlights. Open the bonnet cover.
13 Check the battery cable loose connection. If it is loose, tighten it properly.
14 Turn the headlights on for 2 minutes with the vehicle off. Turn off the headlights again after 2 minutes.
15 Connect the digital multi meter positive and negative test leads to battery terminals respectively. Set DC 20 V
mode in Digital multi meter, Note down the voltage whether it is showing 12.6 V or not. If it is less, crank the
engine and note down the voltage. If it is less than 10 V battery charge is less or Battery weak.

16 Watch the multi meter for 15 to 20 seconds to ensure the reading goes up to 14V Check the battery charging
indicator light in the cluster goes off after starting.

Note: If battery charging indicator light still on after starting, the battery is not getting charge from the
charging system.

17 Turn on the headlights with the multi meter connected and car running. The voltage reading should still be
higher than 12.6 in order to sustain the battery.

Note: If the vehicle can’t sustain the increased load of additional things like headlights, the battery will
need to be replaced.

18 Check the battery casing temperature, if it is too hot the battery is defective. It is to be replaced.
19 Switch off the headlights.
20 Turn off the Ignition key.
21 Remove the mounting clamp nuts.
22 Remove the battery negative terminal clamp connected to the battery.

23 Remove the positive terminal clamp connected to the battery.
24 Remove the battery from vehicle to check the battery charging condition.

122

CITS : Automotive - Mechanic Diesel - Exercise 8.1