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Measuring Load from Headlights

  • 04-09-2012 8:12am
    #1
    pedro7
    Registered Users, Registered Users 2 Posts: 132 ✭✭


    Hi all, I've been given a set of headlights for my girlfriends car to test out. They have sent me 3 resistor packs with them and asked I check the fictitious loading from each pair of these to work out which one will be better to use.

    I assume this is just to measure the change in current being drawn from the battery when the lights are operated?

    Any ideas?!

    Thanks!!


Comments

  • #2
    jayok
    Registered Users, Registered Users 2 Posts: 1,906 ✭✭✭jayok


    Probably. Not sure what the type of car it is and if you can turn on the headlights without the ignition being on, if you can then the current draw on the battery will be your load.

    If you cannot, measure the load with the ignition on, but lights off and then on.


  • #3
    wonski
    Registered Users, Registered Users 2 Posts: 13,685 ✭✭✭✭wonski


    pedro7 wrote: »
    Hi all, I've been given a set of headlights for my girlfriends car to test out. They have sent me 3 resistor packs with them and asked I check the fictitious loading from each pair of these to work out which one will be better to use.

    I assume this is just to measure the change in current being drawn from the battery when the lights are operated?

    Any ideas?!

    Thanks!!

    Aren't these resistors to match resistance in the circuit?
    My friend had some fancy bulbs from Halford recently, and had to put resistors to make them working.
    It was BMW318, and it reported fault(blown bulbs) as soon as he put them on. Resistors did the job.


  • #4
    pedro7
    Registered Users, Registered Users 2 Posts: 132 ✭✭pedro7


    wonski wrote: »
    Aren't these resistors to match resistance in the circuit?
    My friend had some fancy bulbs from Halford recently, and had to put resistors to make them working.
    It was BMW318, and it reported fault(blown bulbs) as soon as he put them on. Resistors did the job.

    Maybe it is. I know on motor bikes its something to do with the flash rate of the indicators. I'll test them out now later and see what happens.

    Its an 09 Ford Ka.

    I cant see putting the wrong one on doing any damage anyway.


  • #5
    wonski
    Registered Users, Registered Users 2 Posts: 13,685 ✭✭✭✭wonski


    pedro7 wrote: »
    Maybe it is. I know on motor bikes its something to do with the flash rate of the indicators. I'll test them out now later and see what happens.

    Its an 09 Ford Ka.

    I cant see putting the wrong one on doing any damage anyway.

    My friend's new bulbs were not lighting up, just flickering. And indicator went on instead of side lights. The mechanic said the system takes into account the resistance, not the actual current.
    That's all i know.
    Not sure if any damage can be done to be honest...


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