a 9006 low beam, the top tab occupies a space roughly from to . On an HIR 9012 low beam,
the tab is both
a 9005 high beam, the top tab occupies a space roughly from to . On an HIR 9011 high beam,
the tab is the same
bulbs will come marke
tabs on the HIR bulbs can be regar
The plastic on the bulbs is a little bit brittle if you try
to cut too much of it at once,† an
There are a couple of other trimming issues that you may need to be alert for. Lots of Jeeps and Chrysler cars used straight-based bulbs OEM. You can virtually always use the angle-base bulbs to replace them, sometimes with a little judicious trimming. There are no decent upgrade straight base bulbs that I am aware of. If thereís any doubt on your vehicle, you might want to get a cheap 9005 angle-base bulb and give it a try. Most Jeeps are not a problem, but Dodge Chargers are known to be very difficult.
Also, there's an issue affecting some vehicles where the hole in the housing has a taper or ridge in it, for no clear reason. This can make it difficult to push and turn the bulb into position. The fix is to bevel the nose of the barrel a little; see pic for my quick and dirty approach. You simply file down the area above the o-ring a little bit, on an angle. Neither of these things present much of a hurdle, and the trimming is still quick and easy (and worth the result).
The info above is the
single-step procedure for stock replacement trimming, and is online here:
Itís also physically possible to trim HIR9011 high-beam bulbs to fit into 9006/HB4 housings.† This is only recommended if you live in rural areas or have projector headlight housings with known good quality light pattern control and upper cutoff. Itís critical to keep your lights aligned properly and make yourself aware of your own glare.
To do the hi-lo conversion, there are three steps-
1) Trim the top tab to fit in a low housing socket (remove the side opposite to the white section, approximately). If the bulbs are not marked, refer to your current 9006 low bulbs and trim the new ones to match.
2) Cut the double guide rails out of the plug section of the bulb. Dremel, utility knife, soldering tip all work well.
3) Double up the o-ring, putting your old o-rings on the barrel of the 9011 bulb behind the existing ones. This centers the bulb and keeps it watertight.
You can use the foam
shipping tube as a holder for trimming.