can i run 140/100 watt headlight bulbs on my factory 99 civic harness?

 

NO.... you'll "toast" melt, fry.... whatever you wish to call it, the factory headlight bulb harness. You will need to use the trigger wire from the factory harness at the bulb, to turn trigger a relay for your high wattage bulbs.

 

Yea, 140 is definitely too high.


You want to run an aftermarket relay wiring harness... I had one come with my old headlights I bought. It looks like this but instead of HID ballast connector plugs it has H4 plugs.

http://cgi.ebay.com/High-intensity-D...#ht_3241wt_941

You'll have to do some searching to find exactly what you need.


EDIT:

Like this
http://cgi.ebay.com/ebaymotors/H4-90...#ht_2293wt_941

The yellow plugs plug into the headlight bulbs, and the male H4 connectors plug into the existing factory headlight harnesses. Then the power wire goes to the battery, and the other wires are grounded.

 

why go hi wattage when you can go 60/55 on some bulbs that offer the same like philips xtreme power or osram night breakers