Weak headlights on 97 ZJ. - JeepForum.com
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post #1 of 46 Old 08-02-2021, 10:49 PM Thread Starter
zjlockers
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Weak headlights on 97 ZJ.

Weak headlights on 97 ZJ.
Anyone experience this?
I am using this standard halogen bulb below from OReillys.
I tried re-grounding the black-harness wire to the vehicle-frame as in below youtube video -- made no difference.
Do I need to try a better bulb or what do I need to do?
Please keep in mind I acquired the vehicle less than a week ago.
https://www.oreillyauto.com/detail/c...ght+bulb&pos=0


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post #2 of 46 Old 08-02-2021, 11:35 PM
riiz
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Replace the harness altogether and run the lights directly from the battery. I've installed 2 of these kits for Ksuspension and only takes about 30 minutes to install.

https://www.ksuspensionfab.com/store...Harness.html#/
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post #3 of 46 Old 08-03-2021, 02:03 AM
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Or build yourself a nice pair of HID lights. Maybe around 230 bucks. img_20180221_171707.jpg
img_20191106_101837-copy.jpg


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post #4 of 46 Old 08-03-2021, 04:05 AM
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Building a set of HID lights is on my list. I added some old Bosch fog lights I had around and they have helped, as did some new housings with fresh lenses. Still just an old design that can't compete with modern lighting.

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post #5 of 46 Old 08-03-2021, 04:06 AM
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Quote:
Originally Posted by yjsaabman View Post
Building a set of HID lights is on my list. I added some old Bosch fog lights I had around and they have helped, as did some new housings with fresh lenses. Still just an old design that can't compete with modern lighting.

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The wiring harness upgrade makes a noticeable difference.


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post #6 of 46 Old 08-03-2021, 06:24 AM Thread Starter
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Quote:
Originally Posted by riiz View Post
Replace the harness altogether and run the lights directly from the battery. I've installed 2 of these kits for Ksuspension and only takes about 30 minutes to install.

https://www.ksuspensionfab.com/store...Harness.html#/
My original harness (shown below, 97 ZJ) does not look anything like his original harness. Do they include adapters for
my type of original-harness?
Also, I am gonna need a lot more than 50% increase in brightness. I can barely see 20feet in front of myself -- almost
impossible traveling at night on the gravel roads out in the middle of the crop-fields.

https://imgdump5.novarata.net/kfldna.jpg

3:00 and 3:51
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post #7 of 46 Old 08-03-2021, 06:37 AM Thread Starter
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Btw, what's the difference between the $23 headlights and the $220 headlights?
https://www.oreillyauto.com/shop/b/l...ens%2Fassembly
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post #8 of 46 Old 08-03-2021, 08:13 AM Thread Starter
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Since I could not really find any effect of using a fresh ground, I am gonna try these LED headlights, together
with these fresh-plastic assemblies.
Hopefully I will eventually get something usable.
"Nilight 9004/HB1 LED Headlight Bulbs, 70w 14000lm 9004 Hi/Lo Beam LED Headlight Bulb 6500k 9004 LED Bulb Cool White IP67" at amazon.com

https://www.oreillyauto.com/detail/c...assembly&pos=2
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post #9 of 46 Old 08-03-2021, 08:24 AM
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following, i have that harness and the euro spec headlighs, but i'm far from seeing well when i drive at night.
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post #10 of 46 Old 08-03-2021, 08:58 AM
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I installed the new harness from KSuspension fab with new housings and Sylvania bulbs last year. Big improvement over the original stock stuff.
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post #11 of 46 Old 08-03-2021, 09:01 AM
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Almost always it's due to voltage drop. I would start looking there. If your wiring is weak, getting more powerful lights may make things worse.
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post #12 of 46 Old 08-03-2021, 09:08 AM
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Yup, the major flaw in the ZJ headlights a is the voltage drop from all the wiring. A relay harness is the best bang for the buck in upgrading them.
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post #13 of 46 Old 08-03-2021, 09:16 AM
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Quote:
Originally Posted by zjlockers View Post
"Nilight 9004/HB1 LED Headlight Bulbs, 70w 14000lm 9004 Hi/Lo Beam LED Headlight Bulb 6500k 9004 LED Bulb Cool White IP67" at amazon.com

If you are going to order LED bulbs Id HIGHLY recommend you go to superbrightLEDs.com Ive done whole interior and exterior bulb sets from them with zero issues.
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post #14 of 46 Old 08-03-2021, 11:19 AM Thread Starter
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Quote:
Originally Posted by kg6mov View Post
Yup, the major flaw in the ZJ headlights a is the voltage drop from all the wiring. A relay harness is the best bang for the buck in upgrading them.
You convinced me. I just added the 9004/9007 harness from ksuspensionfab.com, $25 plus shipping is $33. So, that and already $50 for the two LED bulbs and $88 for the two fresh-plastic housing/assemblies, $171 total so far. If that doesn't fix me, I don't know what will
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post #15 of 46 Old 08-03-2021, 02:32 PM
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I read a really good article on headlight bulbs a year or so ago and I wish I had saved it to share. It was about changing the bulb type in a housing and the effects it can have. Basically, for the housing and lense to distribute the light properly you should stick with the bulb style it was designed for. An LED bulb doesn't put out light the same way a halogen bulb does, so a halogen housing won't properly distribute the light. You may be seeing better, but is the beam pattern right? Think about those cars with the obnoxiously bright headlights that glare and blind you. Do you want to be that person?

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