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Lighting/Illumination This forum is for headlamps, auxillary lighting, interior lighting, and LED conversions.

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Old 04-28-2012, 02:52 AM   #1
Cody Ray
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Default Amp draw

What is the amp draw for low/high beam on a 2001 xlt ranger? Both my low and high beams seem to be quite dim and before I go hooking up my multi meter wanna know if it is above 10amps. The bulbs are brand new.
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Old 04-28-2012, 04:35 AM   #2
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I=P/V. The wattage is written on the bulbs, you can measure your voltage with your multimeter.
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Old 04-28-2012, 09:30 PM   #3
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#9007 DOT headlight bulbs IIRC have a 55W low beam, and a 65W high beam. 2, that's right about 11 amps for your hi beams (it'll be higher still with the engine running).
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Old 04-29-2012, 02:13 AM   #4
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Quote:
Originally Posted by martin View Post
I=P/V. The wattage is written on the bulbs, you can measure your voltage with your multimeter.
That occurred to me while I was typing, but I wanted a base amperage to compare my readings to.
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Old 05-03-2012, 12:48 PM   #5
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Generally the problem is a dirty/corroded connection *Somewhere* (your guess is as good as mine) that reduces voltage at the bulb.

Do remember that the resistance can also be on the ground side.

If the bulbs are silvery/black looking simply replace them, even halogen bulbs only have a RATED service life of something like 1500hours.

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Last edited by AllanD; 05-13-2012 at 10:24 AM. Reason: typo
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