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Honda ST1100 Section => Electrics & Electronics - Volts, Amps and Fuses ST1100 => Topic started by: bluehonda on September 12, 2013, 07:43:13 AM

Title: DRL's with three wires
Post by: bluehonda on September 12, 2013, 07:43:13 AM

I have just bought some DRL's from Ebay, round 9 leds, and they have three wires to connect.
Red and black with bullet connectors (obviously +ve and -ve) and the lights seem pretty bright but there is also a longer white wire with just a tinned end.
Can anybody give me an idea what the extra wire is for?
I can ignore it but It's making me curious.

Brad

Title: Re: DRL's with three wires
Post by: ST2UP on September 12, 2013, 08:59:51 AM

?? Dimmer ?? I have no idea just spit ball'in........

Title: Re: DRL's with three wires
Post by: saaz on September 12, 2013, 10:53:00 AM

Probably for an optional dimmer. Most DRLs can be adjusted for brightness, especially the LED ones.

Here is a wiring example http://www.clearwaterlights.com/downloads/v5_manuals/Honda%20ST1100%20v5.0.pdf (http://www.clearwaterlights.com/downloads/v5_manuals/Honda%20ST1100%20v5.0.pdf)

Title: Re: DRL's with three wires
Post by: atoyot on September 18, 2013, 06:24:04 PM

Aren't DRL's supposed to be wired to come on whenever headlights are off? If so, I've wondered how cars with auto-headlights go when driving through a tunnel in daylight with DRL's on; should they turn off when the headlights come on??

Title: Re: DRL's with three wires
Post by: saaz on September 18, 2013, 06:28:39 PM

A good question.  Something to research further, as I am sure there are ADRs dealing with this issue.