Still got this headlight problem (been about 3 months now)! dim on one side, bright on the other! fuses are fine, relays seem fine, however when you pull out one of the relays all the lights go out, but if u pull out the other one they dont go out, does that mean no power is reaching it???? dunno if this makes sense, kinda hard to explain it all in words! getting to the point where ive had enough now and considering my future with the zed! :mad:

Sounds like someone has messed with the wires?

yeah, under the fuse box there are lots of wires that have been cut and then taped back together!

one of them maybe cross wired

it was working fine when i first got it, id like to check all the wiring from switch, to headlight to fuse and relays, but theres no bloody space in that engine bay to check anything!

i've re read all your posts, ignoring the lights coming on by themselves bit for now,

 

"the N/S round light is on bright, the O/S square lamp is dim and the O/S round and N/S square lamp are slightly glowing"

and

"when i put an earth wire to the O/S square lamp it made it go out and the N/S square lamp came on really bright"

and

"however when you pull out one of the relays all the lights go out, but if u pull out the other one they dont go out,"

 

i've spent some time looking at the circuit diagram and am convinced the problem is with the power not getting to the off-side lights .

 

simplified off-side lighting circuit is: +12v to off-side relay, when relay switches on +12v passes to both the off side lights (round and square)

 

so potential problems here: the problem must be before the point where the +ve side of the round light is connected to the +ve side of the square light. i'm not sure where the join happens, if it is near the lights then check the connectors near the lights (clean coroded pins or wiggle wires), if the join is at the fuse box then ignore the lights, check the contacts at the point where the relay plugs in (is 12v present at the point where the relay plugs in?) try putting a short bit of wire in the off-side relay socket instead of the relay as if the relay was switched on (this will tell you if the problem is post relay

 

next look at the relay, is it turning on? get someone to listen for clicking from the relay when you turn the lights on and off. the simplified circuit for making the relay turn on is: +12v aplied to the "turn on" contact of the relay, 0v side of the "turn on " circuit of the relay is wired to the headlight switch in the car, when this switch is activated it conects to 0V and the relay switches on.

 

so potential problems here (relay not switching on):

+12v not connecting to "turn on" contact of relay (clean contacts, test with multimeter)

or relay broken (get another)

wire from headlight switch to relay broken (poke a wire in the 0v side of the relay "turn on " circuit (coil) and touch the other end to chassis or ov on battery)

 

 

if i had to guess i would say given your turning on by itself problem i would suggest that the loom from the headlight switch to the relays has frayed insulation and intermittent broken wires which ocasionally touch the chassis (either somewhere hot or where they pass through a hole in the body. however i rekon its worth trying all the above to discount other things

Thats the best responce ive had so far, i think im gonna have to read that over a few times so that it makes a bit more sense to me as im no electrician, but thanks very much for that!

IANL did you used to have an S2000?

IANL did you used to have an S2000?

IANL did you used to have an S2000?

 

no

IANL did you used to have an S2000?

 

still no, although i was a passenger in one once for about 5 mins