weird headlight issue

Discussion in 'Technical' started by Wasgood, Mar 15, 2014.

  1. Wasgood

    Wasgood New Member

    I have HID's on low beam, and they've worked fine before now, and my normal halogen bulbs on high beam used to work fine too. This is a permanent new issue, my high beam light on my dash is light up slightly when i have my low beams on, and my high beams themselves are not full brightness but partial. When I turn on my high beams, only the left hand side works, but then the HIDs turn on too. I don't know what could possibly cause this.
     
  2. bRACKET

    bRACKET Do Right Dean

    I had the same issue, there is a wire under the fuse box that's shorting against the chassis. Undo the fuse box, you'll see the wire, tap it up and problem solved. There's a post in my build thread about it.
     
  3. Wasgood

    Wasgood New Member

    Turns out the fuse was blown, I don't know if this'll fix the issue totally, but looks like I'll have to buy some tomorrow.
     
  4. East Coast Z

    East Coast Z Well-Known Member

    The fuse blew because of a short circuit or overload condition.
    Check the wiring, a good place to start would be as bracket has mentioned.
    Having HID's, the earth wiring has probably been modified, this area should be thoroughly checked as well.
     
  5. 8300zx9

    8300zx9 Active Member

    Is this why your forum name is "wasgood"??? HahHa
     
  6. QLDZDR

    QLDZDR ID=David

    Well you definitely check that wire under the fuse box.

    If that isn't the problem and you are just overloading the original wiring for the headlights, then you should fit one of these before it is too late.
    [​IMG]

    If you already have this, then you just need to check your earth points for the ballast as they may become loose over time.
     
  7. SuperZ

    SuperZ Resident Z lunatic

    Hope they have not melted already

    East Coast X 2

    With some logic applied working backwards in probabilities, I can add the following:

    Possibly a low beam left hand side positive wire has contacted with either the left hand HID high beam positive or negative. This would explain all of the symptoms as described

    It's also possible that the respective lines could cross at the junction points as bracket pointed out. This could also achieve all symptoms if the same wires are used

    It less unlikely to be an earthing of the right hand side HID high beam as the indicator light is not explained in this event

    There are other possibilities depending on how the HID was wired into the electrical/s but these are unlikely given the respective lines would still need to be crossed as well.

    You should not be running the HID's through the original wiring and it should be running on its own fuse, otherwise you could start a fire :eek: you should seriously consider rectifying this as a priority if its the case - there is a real possibility and high probability that these respective wires have already melted together in the harness itself and the entire problem you are having is fully explained but still unseen, being in the harness as remember the wires run side by side in the harness.

    It can be a PITA to attempt unwiring of the left hand side light harness - but you cannot see the wiring from the outside anyway - so you are best off to check resistance continuity in the respective individual wires as your first step and/ or rewire the HIDs correctly :(

    If the lines test fine in resistance / continuity and there is no open circuit (melted wires incorrectly joined) then:

    Check around all the connection points, these include where these two wires come together such as the bulb connectors, the fuse boxes and the light switch.

    Hope this helps

    Good luck
     
  8. Wasgood

    Wasgood New Member

    I'm pretty sure that I got a loom with it. I think it was originally for a boat so it came with a lot of wiring. No fuse though. I'll see what a new fuse does. If I end up catching fire so be it.
     
  9. Wasgood

    Wasgood New Member

    Replaced the fuse and it keeps blowing. Looked under the fuse box and couldn't see any thin that could be shorting.
     
  10. QLDZDR

    QLDZDR ID=David

    If you got a loom with your HIDs, then you will have a new wire attached to the +VE battery terminal. That is where you will find an inline fuse.

    If you are using a HID loom then your driver side headlight plug from the original Zed wjring will be hanging unconnected to anything (as it is redundant) so you should tape it up.

    Check your earth points again.
    I remember having a lazy HID because one of my earth points was loose. Probably should have used the motor rather than one of the bolts that hold the front fenders in place.

    Someone should take photos so we all know what your wiring looks like and what it should look like.

    Don't start saying stuff about your Zed burning up.
     
  11. rob260

    rob260 Administrator Staff Member

    What size fuse is it running? If it's blowing non stop you most likely have a short, and no more likely to do with your HIDs as any other light.

    Have you had the dash apart recenty?

    It's worth pointing out that HID's do not draw (on average) enough current to blow a 7.5a fuse, much less do any damage to your wiring.
     
  12. Wasgood

    Wasgood New Member

    It's a 15A, I've had the dash apart a fair bit, but not as recently as the issue occuring.
     
  13. rob260

    rob260 Administrator Staff Member

    Only reason I ask is that I changed my pod holders over the other day and managed to pinch a wire reinstalling them, which lead to exactly the problem you are having.

    HID's won't draw enough current to blow a 15a fuse. You almost certainly have a short somewhere.
     
  14. Wasgood

    Wasgood New Member

    Hang on, I'll upload some photos.
     
  15. Wasgood

    Wasgood New Member

    just to confirm, the only relevant fuses are in the engine bay box and not in the cabin right? I haven't checked any of the cabin ones.
     
  16. Wasgood

    Wasgood New Member

  17. rob260

    rob260 Administrator Staff Member

    Your HIDs are wired up straight to the OEM headlight socket plugs just like the majority of HID installs. I really don't think this is the source of your problems although it would help to check the condition of the wiring and make sure there are no exposed wires or connectors that could be coming into contact with other wires or the body of the car.
     
  18. rob260

    rob260 Administrator Staff Member

    There is a 7.5a light control fuse in the footwell -I actually thought this was the fuse we were referring to.

    Is the 15a fuse in the engine bay blowing?
     
  19. Wasgood

    Wasgood New Member

    Yes it is. I haven't checked the cabin one.
     
  20. rob260

    rob260 Administrator Staff Member

    Have you checked the sockets on the lights? This is a common area for shorts...
     

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