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Old 03-20-2021, 04:04 AM   #1
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Default Question about headlight wattage

So I just purchased some autopal H4 conversion headlights for my 87 hardbody, and I feel like I might have messed up, because I didn't think about wattage and stock wiring. I cannot find anything about stock wires watt rating in my service manual and was wondering if anyone would shed some light on this? The bulbs I purchased are 60/55W, but I am worried that my wiring wont be able to handle it and just melt wires.

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Old 03-20-2021, 05:37 AM   #2
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I think the halogens are 55 watts.
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Old 03-20-2021, 05:49 AM   #3
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Quote:
Originally Posted by cadillacdude1975 View Post
I think the halogens are 55 watts.
I purchased Philips WhiteVision 3700K Halogen Bulbs. According to the manufacturer page, it says 60/55 watts. I assume 60 watts is for the high beams and 55 is for low beams, but I could be mistaken.
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Old 03-20-2021, 01:17 PM   #4
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Good choice on the headlights!



55/60 is standard, legal halogens. 55w low and 60w high beam. The D21 wiring can handle a little hotter bulb without turning crispy.
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Old 03-20-2021, 02:41 PM   #5
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Phew, good to know. Thanks for the info. Was worried I was going to have to remember how to do wiring there for a sec, though I suppose it wouldn't hurt to do a refresher one of these days just incase.
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Old 03-20-2021, 07:31 PM   #6
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You will be fine, the problem with high wattage bulbs, I was running 60/100, is the headlight plug starts to melt. I upgraded to a Hella plug and never had a problem, I also ran my H4's off a relay and upgraded the wires to 10 gauge.
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Old 03-20-2021, 08:09 PM   #7
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can you link us to that plug you installed? kinda intersting
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Old 03-21-2021, 12:15 AM   #8
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I bought them from Summit Racing, the plug uses spring loaded ports where you stick the stripped end of the wire into, the springs are very strong and hold the wires no problem:


https://www.summitracing.com/parts/hla-001909001


Pics of the ones I had:








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Old 03-21-2021, 03:06 AM   #9
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I had to replace one of my headlight plugs when i first bought my truck. This is the exact plug i used.
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Old 03-23-2021, 03:22 AM   #10
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If you are looking to cut wattage on these trucks, you can also start replacing your stock brake, turn signal, and side marker bulbs with their LED equivalents.

I did everything except the headlights and calculated a savings of 250 watts less load on the alternator and battery. That's enough to run a typical refrigerator. Go to SuperBrightLed dot com, the Missouri company. Free replacement if they burn out in less than two years. And they won't. Much brighter too. For what goes where for what bulb, just see THIS THREAD.

If you want to switch out of sealed beam headlights, THIS SET AT AMAZON is cheap, and they work very well. Inside is real chrome, not painted plastic or aluminum paint. Metal housing. For D21 you want the 7x6 size ONLY.

I don't recommend going to LED headlights just yet. I did do it on the wife's 98 Pathy and it worked, but for trucks I'm not sure yet.
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