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Old 01-06-2013, 03:35 PM   #1
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TJ Bosch Headlight Install -- Ugraded Wiring Necessary?

Just got my Bosch H4 housings and bulbs. I thought I ordered the 55/60W bulbs but the ones that came in the box were labeled 90/100W.

I installed using the stock wiring and finally re-aimed the headlights.

Now, since they sent the wrong, albeit more expensive bulbs, what are the implications for using the stock wiring until I can get the upgraded wiring? Will it damage anything in the electrical system/blow suddenly or will it simply limit the potential output? Right off the bat, they are WORLDS better than the stockers and it was a whole 42 minute modification (with aiming).

If new wiring is a must, please let me know your suggestions.

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Old 01-06-2013, 03:38 PM   #2
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not necessary for 55/60W bulbs, but definitely necessary for 90/100W.

Most people suggest Daniel Stern's wiring kits, the Rally Lights website also has a harness available. There are also cheaper Asian wiring kits available on Amazon.

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Old 01-06-2013, 04:26 PM   #3
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They may melt your wiring and switches. Or just catch fire and burn the jeep down.
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Old 01-07-2013, 05:52 AM   #4
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Message received. Picked up some temporary Silverstars (although in my experience, all Silverstars are temporary) to light my way until I have time to swap out the wiring.

Thanks for the warning.

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They may melt your wiring and switches. Or just catch fire and burn the jeep down.
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Old 01-07-2013, 09:54 AM   #5
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So the Silverstars are insanely better than the sealed beam -- but just a temporary fix. The link shows what I currently have -- it's supposed to be the harness which lets you run the 90/100 bulbs (they sent the correct thing now that I look at what I actually ordered).

Headlight Relay Kit

I see three leads for each light plus what I assume is a ground lead. Are there any good write-ups for how to connect this to the battery? I have a single metal hanger off each one of the relays...

Thanks for the help!

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Originally Posted by UnlimitedLJ04 View Post
not necessary for 55/60W bulbs, but definitely necessary for 90/100W.

Most people suggest Daniel Stern's wiring kits, the Rally Lights website also has a harness available. There are also cheaper Asian wiring kits available on Amazon.
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