i just installed some heavy duty H4 plugs because my oem ones had some oil and plastic was deteriorating. however the aftermarket plugs wires where a little bigger and thicker than the oem gauge wires i soldered and heatshrinked them on. are these okay i mean i sodered a little bigger wire to the oem wire?

also i am looking to get an hid kit for a eg H4 kit. i have a question about the kits. is it necessary to get the relay i looked online for kits single and double HID kits? why are some kits with a relay and some dont come with it or does only the double ones get the relay???

im looking to get the single one the kits dont seem to have the relay?

 

It's best to get a relay harness to protect the factory wiring. 35W ballasts only draw about 3 amps while running, but can pull as much as 15 amps or more on start-up.

 

if i run only the single H4 hid kit is the 35w version better, and i looked on line for some xentec kits and most single ones dont come with the relay. will it be safe just to run without?

 

I always recommend 35W. The human eyes perception of light isn't linear. It's logarithmic. Meaning a 100% increase in lumens will only appear to be 25% brighter. It's subjective, as everyone has a different sensitivity to light.

Most 35W ballasts output close to 35 watts. Most 50 and 55W ballasts output something closer to 45W. So is it worth it? I don't feel it is. Especially when it's causing even more glare to other motorists when installed into a halogen headlight.

The relay harness is a good idea. It's cheap insurance. I personally only know a few people with HID kits and one of them fried a computer in their dash which caused all their gauges to go out. The chances something like this could happen to you is low, but for $20, why not get it.

 

how would i install the relay kit. if i buy it. im only getting the one low beam.

 

You buy an H4 relay harness which is already assembled and just plug in the leads. All the leads are different, so it can't be installed incorrectly.

You plug one side into the stock bulb connector which is closest to the battery. Plug in both ballasts and connect red wire to positive battery post and the black wire to the negative.

 

does the relay harness matter for witch relay i use for the 35w. and can it be used with the single hid kit? someone told me at a shop that the single ones dont need relay is it true?

 

low wattage is fine