I am considering purchasing some high output H4 bulbs for my fit. I plan on purchasing a relay harness kit. this means only a signal is drawn from the factory headlight plugs, and puts the power draw instead directly from the battery.

I wish to do this route because some of the bulbs I have looked at draw 90watts for lowbeam and between 100-115watts for the highbeam.



My question is, is the stock honda fit headlight housing up to the task of dealing with this extra heat?


I plan on getting the harness even if not so, as it really will make the stock headlights become brighter. my silverstar bulb replacements are brighter, and I see online lots of people who use them have garnered better results from feeding them battery voltage instead of factory/stock harness voltage

Comments? Experience? Observations?

Please help!


EDIT
here is an example from ebay
Ceramic H4 Headlight Relay Wiring Harness 2 Headlamp Light Bulb Socket Plugs 7" | eBay

 

I would be leery of putting much higher wattage bulbs in the stock reflectors. They're plastic, and undoubtedly engineered to a price point. Dumping almost twice as much heat into them can't be great. Such higher spec bulbs may well be technically illegal for street use, too.

The relay harness will not work properly with the Fit's DRL system. You'll presumably have to disable it by pulling the appropriate fuse. Please remember to turn on your (low-beam) headlights when other cars may have difficulty seeing you, which is good common sense anyhow. For what it's worth, I think the Fit uses relays to turn the headlights on and off already, although I'm not certain about that.

 

Don't use any bulbs higher then 65 watts on the stock circuits, the factory harness is only rated for 55/65watt max, running a higher wattage bulbs will result in melted wire harness, running a aftermarket sub harness will not fix that since its only a sub harness not the whole harness from fuse box.

 

I got some H4 from a guy in China off Ebay. THey were cheap and nice bright white. They really are an improvement over the stock. All I have is his email addy. It is HIDPLUS@hotmail.

I also got some for my Dodge Caravan.


I have had them in for a few months now and no problems.

 

I use Silverstar Ultra 55 watt bulbs in my cars and they must be pretty bright as I'm always getting flashed as if I have my high beams on .................

They really light up the road so try these instead of going to the high watt illegal bulbs.

 

I currentyl use Silverstar bulbs, and I am not satisfied with their brightness. Perhaps I need to try the ultras



a relay harness killls day running light function, and removes power load from the factory harness. factory harness would see only a few milliamps to signal a relay that the lights need to be turned on

 

I have not done it to my fit, but I had a similar setup on my old nissan and currently on my honda accord. My accord is almost 19 years old and the harness with the high wattage bulbs were put on when the car was about 4 years old. No problems whatsoever (still using the original housing) so I would not hesitate to do it on the fit.

 

If you are using thiese types of bulbs they do not qualify as "high powered" because these are all stock wattage but claim to have a output of "95/100/120/130 watt etc" the actual bulb power consumption is 55/65 like oem. The ones you have to watch out for is the cheap Chinese/Korean ebay type bulbs that have like 80-100 watt actual power consumption.

 

No I don't use those bulbs. I use either Hella from Germany or Flosser from France. They are 80 or 90 watts. I don't remember exactly.