So i went to 100 watt bulbs in the fogs... - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ General Discussion Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 03-30-2013, 08:46 PM   #1
Jeeper
 
OhSixTJ's Avatar
 
Join Date: Mar 2013
Posts: 1,074
And there is absolutely no change in brightness. Not even with* upgraded wiring harnesses. Yay me for spending money in nothing! I thought they were supposed to give off more light? The only thing they DID do was pull more power from the battery. Dummy gauge used to sit above "14" at idle and now it's well below it. What a waste.

OhSixTJ is offline   Quote Quick Reply
Old 03-30-2013, 08:48 PM   #2
Jeeper
 
Patrick H's Avatar
 
Join Date: Nov 2011
Location: Northern NM
Posts: 3,133
Did you use the factory fog light harness? The wire gauge is not up to powering 100W bulbs. If you run them very long, they'll likely start melting the wire.

Patrick H is offline   Quote Quick Reply
Old 03-30-2013, 08:56 PM   #3
Jeeper
 
OhSixTJ's Avatar
 
Join Date: Mar 2013
Posts: 1,074
Quote:
Originally Posted by Patrick H View Post
Did you use the factory fog light harness? The wire gauge is not up to powering 100W bulbs. If you run them very long, they'll likely start melting the wire.
Yeah I typed it wrong. Bumped the wires up to 12s running off of their own relay. Factory harness is just used as the trigger now.
OhSixTJ is offline   Quote Quick Reply
Old 03-30-2013, 08:59 PM   #4
Jeeper
 
Patrick H's Avatar
 
Join Date: Nov 2011
Location: Northern NM
Posts: 3,133
Quote:
Originally Posted by OhSixTJ View Post
Yeah I typed it wrong. Bumped the wires up to 12s running off of their own relay. Factory harness is just used as the trigger now.
Oh good.
Patrick H is offline   Quote Quick Reply
Old 03-30-2013, 09:02 PM   #5
Jeeper
 
OhSixTJ's Avatar
 
Join Date: Mar 2013
Posts: 1,074
Quote:
Originally Posted by Patrick H View Post

Oh good.
Yeah but it's the same brightness as the 55w it had before. Reason I switched them is because I had read 27w. They actually read "27 w EU 55 w DOT" or something like that.

I was hoping for a little more light.
OhSixTJ is offline   Quote Quick Reply
Old 03-30-2013, 09:13 PM   #6
Jeeper
 
dingos_unlimited's Avatar
 
Join Date: Feb 2013
Location: cape girardeau mo
Posts: 145
Don't quote me on this but I think it has to do with the reflector in the lamp ??
dingos_unlimited is offline   Quote Quick Reply
Old 03-30-2013, 09:19 PM   #7
Jeeper
 
OhSixTJ's Avatar
 
Join Date: Mar 2013
Posts: 1,074
Quote:
Originally Posted by dingos_unlimited View Post
Don't quote me on this but I think it has to do with the reflector in the lamp ??
Sounds logical but damn, not even 1% brighter. It's weird to me.
OhSixTJ is offline   Quote Quick Reply
Old 03-30-2013, 09:33 PM   #8
Jeeper
 
dingos_unlimited's Avatar
 
Join Date: Feb 2013
Location: cape girardeau mo
Posts: 145
Indeed. More power always makes things better. ( enter tim the tool man grunt )
dingos_unlimited is offline   Quote Quick Reply
Old 03-30-2013, 09:57 PM   #9
Jeeper
 
OhSixTJ's Avatar
 
Join Date: Mar 2013
Posts: 1,074
Quote:
Originally Posted by dingos_unlimited View Post
Indeed. More power always makes things better. ( enter tim the tool man grunt )
Exactly!
OhSixTJ is offline   Quote Quick Reply
Old 03-31-2013, 01:30 PM   #10
Jeeper
 
Wheel2Work's Avatar
 
Join Date: Feb 2011
Location: Southern Oregon
Posts: 874
Quote:
Originally Posted by dingos_unlimited View Post
Don't quote me on this but I think it has to do with the reflector in the lamp ??
^^^ exactly right ^^^
__________________
2000 4.0l Sport, Auto, some mods done - planning more
Wheel2Work is offline   Quote Quick Reply
Old 03-31-2013, 03:28 PM   #11
Jeeper
 
Rolf's Avatar
 
Join Date: Sep 2011
Location: South Africa
Posts: 941
No matter what the reflectors are like 100w should be brighter than 55w. Are you sure they are true 100w and not just "as bright as 100w" or "80% brighter than standard bulbs"?

I have IPF 7" spots with 130w bulbs and let me tell you, you can tell when they are not 55w. I can feel their heat from more than a meter and a half away.
__________________
2003 Wrangler Sahara 4.0 42rle D30/D44
Front: 2" BDS coils + JKU shocks
Rear: 2" BB + Zone Nitro shocks
Zone 1.25" BL + 1" MML, UCF LoPro
32" BFG AT on 16" Racing Hart
Ramsey Pro Plus 6000, IPF 900s 130W
Rolf is offline   Quote Quick Reply
Old 03-31-2013, 04:14 PM   #12
Jeeper
 
OhSixTJ's Avatar
 
Join Date: Mar 2013
Posts: 1,074
Quote:
Originally Posted by Rolf View Post
No matter what the reflectors are like 100w should be brighter than 55w. Are you sure they are true 100w and not just "as bright as 100w" or "80% brighter than standard bulbs"?

I have IPF 7" spots with 130w bulbs and let me tell you, you can tell when they are not 55w. I can feel their heat from more than a meter and a half away.
Thats what i was thinking too! they should at least be a little brighter than the 55s.

They have 100w stamped on the metal part of the bulb. And they're using more battery power according to the dummy gauge.
OhSixTJ is offline   Quote Quick Reply
Old 04-01-2013, 12:25 AM   #13
Jeeper
 
Join Date: Mar 2011
Posts: 423
They ARE brighter than the 55w bulbs. Reason I know is a stopped after one bulb and tried them, and the 100w bulb was noticeably brighter on the side it was on. Now if you changed both bulbs and then decided it made no difference, you are fooling yourself. The pattern is the same, just brighter.
__________________
Gary
1967 Kaiser Commando
2001 Grand Cherokee WJ
2003 Rubicon TJ
KaiserJeep is offline   Quote Quick Reply
Old 04-01-2013, 06:03 AM   #14
Jeeper
 
OhSixTJ's Avatar
 
Join Date: Mar 2013
Posts: 1,074
Quote:
Originally Posted by KaiserJeep View Post
They ARE brighter than the 55w bulbs. Reason I know is a stopped after one bulb and tried them, and the 100w bulb was noticeably brighter on the side it was on. Now if you changed both bulbs and then decided it made no difference, you are fooling yourself. The pattern is the same, just brighter.
I'm not dumb. I did the same, swapped one to compare. No difference.
OhSixTJ is offline   Quote Quick Reply
Old 04-02-2013, 09:05 AM   #15
Jeeper
 
Join Date: Mar 2011
Posts: 423
Real 100w H3 bulbs cannot be swapped into the foglights without first being modified. What did you do to make them fit?
__________________
Gary
1967 Kaiser Commando
2001 Grand Cherokee WJ
2003 Rubicon TJ
KaiserJeep is offline   Quote Quick Reply
Old 04-02-2013, 09:21 AM   #16
Jeeper
 
OhSixTJ's Avatar
 
Join Date: Mar 2013
Posts: 1,074
Quote:
Originally Posted by KaiserJeep View Post
Real 100w H3 bulbs cannot be swapped into the foglights without first being modified. What did you do to make them fit?
Nothing, they dropped right in. So you're saying I got taken? Package said 100w, bulb is stamped 100w.

I did a quick google search and out of the 50 "100w" bulbs I saw, only 1 looked different. It had a small tab on it. So 49 others are falsely advertising wattage?
OhSixTJ is offline   Quote Quick Reply
Old 04-02-2013, 10:03 AM   #17
Jeeper
 
Neil F.'s Avatar
 
Join Date: Nov 2007
Location: Marlton, NJ
Posts: 4,908
Images: 1
Quote:
Originally Posted by KaiserJeep View Post
Real 100w H3 bulbs cannot be swapped into the foglights without first being modified. What did you do to make them fit?

A H3 bulb is a H3 bulb. They are interchangeable. It's the stock wiring that cannot handle them which he said he changed.
__________________
2003 TJ, 33" BFG AT, 2" BL, 2" BDS spring lift, Truck Lite headlights, Homemade sunrider top.
Neil F. is offline   Quote Quick Reply
Old 04-02-2013, 10:11 AM   #18
Jeeper
 
InvisiblePants's Avatar
 
Join Date: Jan 2013
Location: Charleston, SC
Posts: 517
Images: 11
You can send them to me. I will test them, and report back to you... :thumbup:
InvisiblePants is offline   Quote Quick Reply
Old 04-02-2013, 10:22 AM   #19
Jeeper
 
OhSixTJ's Avatar
 
Join Date: Mar 2013
Posts: 1,074
Quote:
Originally Posted by InvisiblePants View Post
You can send them to me. I will test them, and report back to you... :thumbup:
I'll keep that in mind! Who knows, maybe you'll have better luck haha
OhSixTJ is offline   Quote Quick Reply
Old 04-02-2013, 10:44 AM   #20
Jeeper
 
Join Date: Mar 2011
Posts: 423
OK this is starting to make some sense now.

For those that do not know, a 55w H3 bulb has a round flange. A 100w H3 bulb has the same round flange, plus a little tab on the side that sticks out, intended to prevent a hotter 100w bulb going into a plastic light housing intended for only 55w of heat.

But the stock Jeep foglights are not plastic, they have cast metal bulb sockets, metal reflectors, and glass lenses, and can tolerate the 100w bulbs without damage.

The fact that you were able to install the 100w H3's without modifying the bulb by cutting off the tab means that the foglights you were "modifying" already had 100w bulbs - they had already been upgraded, and they were NOT the standard 55w Jeep foglights. This could have been done by the original owner of the Jeep, or even by the Jeep dealer, seeking to make more profit on the lights.

This totally explains the fact that you saw no brightness increase. Your additional remarks about the guage also puzzled me - the stock guage is a simple voltmeter, and there should be plenty of excess current capacity in the alternator, there should be no voltage difference even with an extra 90w of lighting. I can't explain why you think the guage is reading differently between the two sets of bulbs, if both were 100w.
__________________
Gary
1967 Kaiser Commando
2001 Grand Cherokee WJ
2003 Rubicon TJ
KaiserJeep is offline   Quote Quick Reply
Old 04-02-2013, 10:57 AM   #21
Jeeper
 
Tanks's Avatar
 
Join Date: Jan 2012
Location: LA
Posts: 486
Quote:
Originally Posted by KaiserJeep
OK this is starting to make some sense now.


This totally explains the fact that you saw no brightness increase. Your additional remarks about the guage also puzzled me - the stock guage is a simple voltmeter, and there should be plenty of excess current capacity in the alternator, there should be no voltage difference even with an extra 90w of lighting. I can't explain why you think the guage is reading differently between the two sets of bulbs, if both were 100w.
Could be the resistance added in the op's new harness?
__________________
It's hip to be square.

[_]lllllll[_]
Tanks is offline   Quote Quick Reply
Old 04-02-2013, 10:59 AM   #22
Jeeper
 
OhSixTJ's Avatar
 
Join Date: Mar 2013
Posts: 1,074
Quote:
Originally Posted by KaiserJeep View Post
OK this is starting to make some sense now.

For those that do not know, a 55w H3 bulb has a round flange. A 100w H3 bulb has the same round flange, plus a little tab on the side that sticks out, intended to prevent a hotter 100w bulb going into a plastic light housing intended for only 55w of heat.

But the stock Jeep foglights are not plastic, they have cast metal bulb sockets, metal reflectors, and glass lenses, and can tolerate the 100w bulbs without damage.

The fact that you were able to install the 100w H3's without modifying the bulb by cutting off the tab means that the foglights you were "modifying" already had 100w bulbs - they had already been upgraded, and they were NOT the standard 55w Jeep foglights. This could have been done by the original owner of the Jeep, or even by the Jeep dealer, seeking to make more profit on the lights.

This totally explains the fact that you saw no brightness increase. Your additional remarks about the guage also puzzled me - the stock guage is a simple voltmeter, and there should be plenty of excess current capacity in the alternator, there should be no voltage difference even with an extra 90w of lighting. I can't explain why you think the guage is reading differently between the two sets of bulbs, if both were 100w.
The new "100w" bulbs didn't have this tab you speak of. So then even if the original bulbs were stamped with "55w" you're saying they were really 100w?

Fogs on vs fogs off
Attached Thumbnails
Click image for larger version

Name:	image-795591002.jpg
Views:	30
Size:	79.7 KB
ID:	230605   Click image for larger version

Name:	image-1167620476.jpg
Views:	32
Size:	74.6 KB
ID:	230606  

OhSixTJ is offline   Quote Quick Reply
Old 04-02-2013, 11:01 AM   #23
Knows a couple things...

WF Supporting Member
 
Jerry Bransford's Avatar
 
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 30,852
Images: 2
Quote:
Originally Posted by Tanks View Post
Could be the resistance added in the op's new harness?
Going to a larger wire gauge as the OP did won't add any resistance.
__________________
When you have a choice, buy American.

Jerry Bransford is online now   Quote Quick Reply
Old 04-02-2013, 11:33 AM   #24
Jeeper
 
Tanks's Avatar
 
Join Date: Jan 2012
Location: LA
Posts: 486
Quote:
Originally Posted by Jerry Bransford View Post
Going to a larger wire gauge as the OP did won't add any resistance.
Not going to the larger wire, but something in the system somewhere. Possibly grounding out funny or a misseated relay.
__________________
It's hip to be square.

[_]lllllll[_]
Tanks is offline   Quote Quick Reply
Old 04-02-2013, 11:46 AM   #25
Jeeper
 
Join Date: Mar 2011
Posts: 423
This is the tab I was talking about:


...sticking out from the flange on the right side. It has to be cut off to get the 100w or 130w H3 into a standard 55w H3 socket. Certainly I can't buy 100w bulbs that don't have the tabs in any local store. But I saw several 100w H3 bulbs that did not have the tab when I went looking for this image, so it is not as much a standard as I thought.

I'm back to being puzzled by this. The dash pictures above show a lower voltage on 100w bulbs so they would be dimmer. Rev the engine above idle and you SHOULD see full voltage and a brightness difference. I'm guessing that the extra 90w is exceeding the alternator output at idle RPMs.

If that is true you are not charging the battery at idle. Leave your lights on and the battery discharges even with the engine running.

TANSTAAFL (There Ain't No Such Thing As A Free Lunch): Most of the 100w bulbs are rated for about 100 hours of life, while most of the 55w bulbs are good for 250 hours or so. Average life varies about 10-15% by brand.
__________________
Gary
1967 Kaiser Commando
2001 Grand Cherokee WJ
2003 Rubicon TJ
KaiserJeep is offline   Quote Quick Reply
Old 04-02-2013, 11:55 AM   #26
Jeeper
 
OhSixTJ's Avatar
 
Join Date: Mar 2013
Posts: 1,074
Quote:
Originally Posted by KaiserJeep View Post
This is the tab I was talking about:

...sticking out from the flange on the right side. It has to be cut off to get the 100w or 130w H3 into a standard 55w H3 socket. Certainly I can't buy 100w bulbs that don't have the tabs in any local store. But I saw several 100w H3 bulbs that did not have the tab when I went looking for this image, so it is not as much a standard as I thought.

I'm back to being puzzled by this. The dash pictures above show a lower voltage on 100w bulbs so they would be dimmer. Rev the engine above idle and you SHOULD see full voltage and a brightness difference. I'm guessing that the extra 90w is exceeding the alternator output at idle.
Revving the engine does increase the brightness. So I think I agree with you on the alternator output aspect. What's still puzzling me is the brightness between the 2 different wattages. I'll recheck the grounds and see if I can measure resistance with my multimeter.

Lets see if I can figure out how to do that haha I'm guessing one lead on the power wire and one on the ground. Then test power wire to the battery's negative terminal to see the difference?
OhSixTJ is offline   Quote Quick Reply
Old 04-02-2013, 11:58 AM   #27
Jeeper
 
aaronarmenta's Avatar
 
Join Date: Nov 2012
Location: Phoenix, Arizona
Posts: 96
Ive been thinking about doing this so...
__________________
Blue brick with a lift
aaronarmenta is offline   Quote Quick Reply
Old 04-04-2013, 03:27 PM   #28
Jeeper
 
Join Date: Nov 2010
Posts: 204
Just upgraded mine last week. The guys at my local 4 wheel parts tossed me a Hella 30 amp relay. I upgraded to 12ga wiring and by passed my factory wiring. Just tapped into the wiring harness for the switch power. Used some 130watt kc bulbs and made a huge difference.
DPD06 is offline   Quote Quick Reply
Old 04-05-2013, 11:21 PM   #29
Jeeper
 
OhSixTJ's Avatar
 
Join Date: Mar 2013
Posts: 1,074
Ok, just ran all the grounds straight to the battery. No change. And lights still dim at idle. I guess the alternator is next. Or a bigger relay? I think it's a 30 amp which should be plenty...
OhSixTJ is offline   Quote Quick Reply
Old 04-05-2013, 11:27 PM   #30
Jeeper
 
s14sh3r's Avatar
 
Join Date: Sep 2011
Location: Clayton, OK
Posts: 2,049
Have you checked the voltage at the light?

s14sh3r is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



» Rates
Get low rates on auto insurance in Canada!

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 02:06 PM.



Jeep, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC