LEDs for H4 headlights

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chris68
DDK forever
Posts: 521
Joined: Thu Apr 28, 2005 12:54 pm
Location: Burton On Trent

Re: LEDs for H4 headlights

Post by chris68 »

Could be that current draw with LED side/brake lights is below the 'wetting current' level necessary to overcome dirt and oxidation on switch contacts. Not an issue with good old filament bulbs because the current is much higher. Also, a filament has lower resistance when cold so briefly draws higher current at switch on that further helps break through contact surface grime. Or maybe I'm talking rubbish.
'68 swb 911L (rhd)
'62 Lotus 22
100cc Historic Karts
leedurrant73
DDK rules my life!
Posts: 1409
Joined: Thu Feb 10, 2011 1:22 pm
Location: lowestoft,suffolk

Re: LEDs for H4 headlights

Post by leedurrant73 »

No that makes good sense I’m going to clean thoroughly thanks


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1969 911t, eighth off the production line - B Series, Collecting Parts Again for Resto.
1984 Devon T25 VW Campervan, Back on the Road
1969 Italian Lambretta GP200. Tuned, (restored)
1967 Italian Lambretta SX150, 3 owner, 5 Speed, (Restored)
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