Headlights dim after "upgrade" - JeepForum.com
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post #1 of 38 Old 08-14-2017, 11:33 AM Thread Starter
SgtPsychosis
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Headlights dim after "upgrade"

'04 TJ

I replaced my stock headlights with some halos, and the actual bulbs are Silverstar Ultras. This combination should be relatively bright, but it isn't. The actual stock lights seemed brighter! I have done a rough alignment of the lights, all the connections are clean, and I have no other electrical issues. Under a full load, the alternator is putting out around 13.7 V.

Has anyone else had this issue, and what did you do to resolve it?

Thanks in advance,

Tim

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post #2 of 38 Old 08-14-2017, 11:35 AM
2005TJdaily
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Quote:
Originally Posted by SgtPsychosis View Post
'04 TJ



I replaced my stock headlights with some halos, and the actual bulbs are Silverstar Ultras. This combination should be relatively bright, but it isn't. The actual stock lights seemed brighter! I have done a rough alignment of the lights, all the connections are clean, and I have no other electrical issues. Under a full load, the alternator is putting out around 13.7 V.



Has anyone else had this issue, and what did you do to resolve it?



Thanks in advance,



Tim


Do you have the additional regulators that go with the upgraded lights?


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post #3 of 38 Old 08-14-2017, 11:57 AM Thread Starter
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Do you have the additional regulators that go with the upgraded lights?


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Well....that could be an issue! I think maybe I need to find some additional regulators...

Anyway I could get you to point me in the right direction?

And, thank you!
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post #4 of 38 Old 08-14-2017, 12:04 PM
2005TJdaily
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Originally Posted by SgtPsychosis View Post
Well....that could be an issue! I think maybe I need to find some additional regulators...



Anyway I could get you to point me in the right direction?



And, thank you!




My Halos came with them.
It's a combination of Halogen & Zenon for brights



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post #5 of 38 Old 08-14-2017, 12:43 PM
Jerry Bransford
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Quote:
Originally Posted by 2005TJdaily View Post
Do you have the additional regulators that go with the upgraded lights?
You don't install any additional "regulators" for upgraded halogen headlights as the OP installed, and there's nothing by that name in the OE headlight circuit. The Sylvania Silverstar Ultras run on straight battery voltage, that's it. Sylvania's Silverstar Ultra isn't LED or HID, it's just a standard 55 watt plug & play halogen bulb so they don't need anything else other than good connections and normal battery voltage at the connector.
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post #6 of 38 Old 08-14-2017, 06:16 PM
pwmac
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Jerry is correct. What the OP needs to do is find out why his voltage is so low. With the motor running the voltage SB 14.5+
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post #7 of 38 Old 08-14-2017, 07:20 PM
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13.7V isn't low. The OP needs to measure it at the lights themselves though...
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post #8 of 38 Old 08-14-2017, 08:52 PM
pwmac
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If the motor is running 13.7v at the battery is not good. I never see less than 14.5/14.8.
And I see 14.5/14.8v on 5 vehicles I own. My Jeep is on the high end of that range. Numbers in the 13v range with the motor running means there is trouble in the charging system or a battery that is on its last legs. Voltage like that frequently cause dimming of the lights at idle.
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post #9 of 38 Old 08-14-2017, 10:21 PM
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Is the housing a decent quality?
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post #10 of 38 Old 08-15-2017, 06:21 AM
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How did you wire the halos in? If you wired them in series with the bulbs, that would explain why they are dim.
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post #11 of 38 Old 08-15-2017, 06:48 AM
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Originally Posted by pwmac View Post
If the motor is running 13.7v at the battery is not good. Numbers in the 13v range with the motor running means there is trouble in the charging system or a battery that is on its last legs.
PaulW
Hog wash....... anything above 13v and a couple decimals below 15v is acceptable.

SgtPsychosis check your grounds if you haven't done so already.

Wonder if a heavier gauge wire from the relay to the headlights would help, it sure wouldn't hurt.

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post #12 of 38 Old 08-15-2017, 09:49 AM
Jerry Bransford
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Wonder if a heavier gauge wire from the relay to the headlights would help, it sure wouldn't hurt.
It wouldn't hurt but it wouldn't help either. The headlights he installed have the same 55 watt rating that the factory headlights have so a heavier gauge wire isn't beneficial like it would be with higher than factory wattage bulb. The factory 14 gauge wiring is more than up to carrying the current drawn by a 55 watt bulb. A 55 watt bulb only draws just over 4 amps and a 14 gauge wire is conservatively rated to carry 15 amps.

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post #13 of 38 Old 08-15-2017, 09:59 AM
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Originally Posted by Jerry Bransford View Post
It wouldn't hurt but it wouldn't help either. T he headlights he installed have the same 55 watt rating that the factory headlights have so a heavier gauge wire isn't beneficial like it would be with higher than factory wattage bulb. The factory 14 gauge wiring is more than up to carrying the current drawn by a 55 watt bulb. A 55 watt bulb only draws just over 4 amps and a 14 gauge wire is conservatively rated to carry 15 amps.
Yeah don't know much about these new style headlights. Didn't know if they are an exception to Ohm's law or not. Stranger things have happened

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post #14 of 38 Old 08-19-2017, 01:38 PM Thread Starter
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Originally Posted by Icarus View Post
13.7V isn't low. The OP needs to measure it at the lights themselves though...
OP here. Thank you for the help, sorry for the delayed response. With the engine running, I am drawing ~11.3 at the light. When I get out of work, I will be pulling out the Haynes to see if this is normal or below. Honestly, I am hoping that it is 'below normal,' because that means I will be on the right track.

Tim
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post #15 of 38 Old 08-19-2017, 05:09 PM
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The Haynes manual is a waste of money and time. Get the OEM FSM so you know what you're working with...
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