Testing an H3 Bulb

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slvr-bullet

Member - Posts: 23

Joined: January 21, 2003

Location: Canada

Posted: April 12, 2006 at 3:47 PM / IP Logged

I purchased some OEM fog lights.

Now I want to test them out first before I install them but I can't get it to work.

I'm using a variable DC power supply and when I hook up the +/- (12v) to either the bulb or the wiring harness connector, the voltage just drops to zero.

The front panel of the power supply goes (+/-) (ground) (+/-)

What am I doing wrong?

Mad Scientists

Silver - Posts: 380

Joined: February 07, 2004

Location: United States

Posted: April 12, 2006 at 4:17 PM / IP Logged

I'd suspect the power supply can't output what the bulb needs.. what's the rating on the power supply?

Jim

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slvr-bullet

Member - Posts: 23

Joined: January 21, 2003

Location: Canada

Posted: April 12, 2006 at 4:26 PM / IP Logged

Mad Scientists wrote:

I'd suspect the power supply can't output what the bulb needs.. what's the rating on the power supply?

Jim

input = 120v, 60Hz, 80W

output = 0-15v, 1A max.

The bulb is 12v, 55W

slvr-bullet

Member - Posts: 23

Joined: January 21, 2003

Location: Canada

Posted: April 12, 2006 at 5:35 PM / IP Logged

Finaly got it to work.

Hooked it up to one of those booster packs.

Thanks for your help tho ;)

ff-mike

Copper - Posts: 199

Joined: November 15, 2004

Location: United States

Posted: April 14, 2006 at 10:35 AM / IP Logged

You can use a multimeter to check the bulbs for continuity, or resistance. They measure around 2-3 ohms.

A 12v 55w lamp uses around 4.5amps of current, that is why your 1a power supply did nothing

slvr-bullet

Member - Posts: 23

Joined: January 21, 2003

Location: Canada

Posted: April 14, 2006 at 8:38 PM / IP Logged

Yah, I figured that out after I did I=P/V Testing an H3 Bulb -- posted image.

skyford

Member - Posts: 3

Joined: May 10, 2006

Location: China

Posted: May 10, 2006 at 4:33 AM / IP Logged

Can you show me a photo of your H3 bulbs?

HID-High Intensity Discharge

Xenon Lamp for your cars

ff-mike

Copper - Posts: 199

Joined: November 15, 2004

Location: United States

Posted: May 10, 2006 at 9:12 AM / IP Logged

That is not an H3

slvr-bullet

Member - Posts: 23

Joined: January 21, 2003

Location: Canada

Posted: May 10, 2006 at 11:50 AM / IP Logged

Yah, that looks more lid a HID bulb.

This is a H3 bulb

skyford

Member - Posts: 3

Joined: May 10, 2006

Location: China

Posted: May 17, 2006 at 12:28 AM / IP Logged

Yes, this is just the bulb, and here is a ballast. Two bulbs and two ballasts are included in one unit conversion kits.

HID-High Intensity Discharge

Xenon Lamp for your cars

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