I am doing some work on my headlights and want to know what filament the daytime running lights use-the Hi beam or the low beam.

I'm not near my truck at the moment-and thought someone would know from previous experience.

Cheers!

 

I believe they use the high beams at a reduced voltage.

 

^^^^^ What he said.

Canadian trucks use highbeam filament at a reduced voltage. Theory being that high beam usage is much less than low beams. If one does burn out you would still have both low beams for nightime use.

 

Personally I would leave the stock headlights alone and go with LED's for DRLs. That's where the auto manufacturers are heading.

And the LEDs are not that expensive.
http://www.superbrightleds.com/cgi-b...sp=%2Fdrl.html

MikeyB