H4 and H7 bulbs..
H4 and H7 bulbs.. I herd H4 has higher wattage bulbs.. But was wondering i know how to hook up H7 to our car but the H4 has three prongs. Whats the third for?? How would i go about rigging this up?
Copy & Paste Moderator
Joined: Apr 2002
Posts: 9,764
Likes: 208
From: Eastern MA
The H4 bulb has a low beam and high beam filament. Thus, it has two positive prongs (one for low and one for high beam) and a common ground prong.
Also, look at the actual lumens output and not just the wattage.
Also, look at the actual lumens output and not just the wattage.
Copy & Paste Moderator
Joined: Apr 2002
Posts: 9,764
Likes: 208
From: Eastern MA
One housing...what?
H4 has 3 prongs
* one prong is the positive for the low beam filament
* one prong is the positive for the high beam filament
* one prong is the common ground for both filaments
To turn on the low beam filament, wire up the low beam positive prong to a positive 12volt source and the common ground to a good gound.
To turn on the high beam filament, wire up the high beam positive prong to a positive 12volt source and the common ground to a good gound.
To turn on both filaments, wire up both positive prongs to 12volt sources and the common ground to a good ground.
H4 has 3 prongs
* one prong is the positive for the low beam filament
* one prong is the positive for the high beam filament
* one prong is the common ground for both filaments
To turn on the low beam filament, wire up the low beam positive prong to a positive 12volt source and the common ground to a good gound.
To turn on the high beam filament, wire up the high beam positive prong to a positive 12volt source and the common ground to a good gound.
To turn on both filaments, wire up both positive prongs to 12volt sources and the common ground to a good ground.
Originally Posted by VIP1
One housing...what?
H4 has 3 prongs
* one prong is the positive for the low beam filament
* one prong is the positive for the high beam filament
* one prong is the common ground for both filaments
To turn on the low beam filament, wire up the low beam positive prong to a positive 12volt source and the common ground to a good gound.
To turn on the high beam filament, wire up the high beam positive prong to a positive 12volt source and the common ground to a good gound.
To turn on both filaments, wire up both positive prongs to 12volt sources and the common ground to a good ground.
H4 has 3 prongs
* one prong is the positive for the low beam filament
* one prong is the positive for the high beam filament
* one prong is the common ground for both filaments
To turn on the low beam filament, wire up the low beam positive prong to a positive 12volt source and the common ground to a good gound.
To turn on the high beam filament, wire up the high beam positive prong to a positive 12volt source and the common ground to a good gound.
To turn on both filaments, wire up both positive prongs to 12volt sources and the common ground to a good ground.
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Copy & Paste Moderator
Joined: Apr 2002
Posts: 9,764
Likes: 208
From: Eastern MA
Originally Posted by 01ls1lover
thanx!
Originally Posted by InfiniteReality
Just curious, but a H4 bulb will fit in an H7 housing and all you need to do is re-wire the harness?
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