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Old 05-19-2014, 06:30 PM
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Help me find some HID headlights

Guys
I would like to change the headlights in my 1938 Ford pickup. Currently the entire electrical system is converted to 12volts. But the headlights still suck!
I daily drive this truck so seeing at night is important to me.

Rather than going with a bright bulb I want to change everything to a HID system. I'm a little scared because it seems like i have to use "universal" kits and parts to make this work.

What are your experiences with HID lighting for our old cars? What kits have you used and how did they work out?

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Old 05-19-2014, 10:27 PM
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This looks interesting:
Dapper Lighting 7 Inch Classic Projector Kit | Dapper Lighting
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Old 05-20-2014, 01:38 AM
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If you converted to 12 volts and I assume you used a 7" halogen headlight the reason for them being dim is common,here is the fix. H4 Headlight Relay Wiring Harness 2 Head Lamp Systems Fix Dim Lights 7" Round 5 | eBay
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Old 05-20-2014, 01:41 AM
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This should explain why I recommend these: Tips Click on the top option "A Current Topic" it will explain why brighter bulbs can be a problem rather than a fix without relays.
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Old 05-20-2014, 05:07 AM
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Before you do anything, check for voltage drop in the headlight circuit. It is an easy test.
With the headlights on high beam, put positive voltmeter probe on the positive battery post, not the clamp, the post. Put the negative voltmeter probe on the high beam terminal of the headlight. The voltage should be less than .500 volts, ideally less than .200 volts.
Do the same on the ground side of the headlihgts. Negative voltmeter probe on negative battery terminal, positive voltmeter probe on ground terminal of headlights. Again, the voltage should be less than .500 volts, ideally less than .200 volts.

More details on voltage drop testing here.
Voltage Drop Testing

There are a lot of headlight relay harnesses out there. Most are being made by somebody trying to make money, and they still do not use large enough wire to adequately supply current to your headlights. They are easy to make. Get this relay from summit racing.


This is a relay box I got at a junkyard from a Ford Aerostar, and mounted two of the summit relays, and two fuses in.


This is the wiring circuit I used on a 1974 Ford pickup.
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Old 05-21-2014, 09:31 AM
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Thanks guys. I will look into this over the weekend.
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Old 05-21-2014, 11:41 AM
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Hella makes a good halogen 7" diameter headlight. Part # 70477.
Relays can help if you have a voltage problem.
HID means high intensity discharge. I think they are not worth the cost.
Don't confuse HID with halogen lamps. Totally different animal.

vicrod
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