Passing Lamp Fuse ??

[lshafer]

I've added passing lamps to my 06 RSTD and I'm having some trouble. I set up an in-line fuse on the circuit and connected it to the low beams. The whole thing is on a switch. I thought I read to that they use a 7.5 amp fuse. That's what I tied and it blew instantly. So, before I go messing around I thought I'd ask the experts. What size fuse should I be using on these passing lights. They're Yamaha OEM passing lights.

 

Sugguestions would be quite helpful. Thanks all!!

[wes0778]

1st off you should run the passing lights off a relay connected directly to the battery. If you want the the lights on only on low beam then run the control circuit for the relay off the low beam wire. My personal preference is to have the passing lights on ALL the time. So to have a second point of failure, I have the relay control hooked to the power connector (cigarette lighter style plug) on the left lower side of the inner fairing, of the RSV. Not sure if the RSTD has such a connector. Having the relay control hooked there means that the passing lights will remain on if, for whatever reason the headlight fuse blows.

As for fuse size, I have a 14ga wire, with a 20amp fuse, run under the tank to the power connector (#30) on the relay.

[bkuhr]

What are the watts rating of the lamps(bulbs)?

 

lamp 1 watts + lamps 2 watts=total watts

total watts/(divided by)12V electrical system amps required+10%=fuse size, use next higher common size.

 

ex: 35 watts lamps

35w+35w=70 watts

70w/12v=5.8 amps

5a+10%=6.4 amps

next common fuse size is 7.5amp

If you are using a fuse correctly rated and it still blows, then there is a problem, shorted wiring, lamp socket, etc.

[lshafer]

What are the watts rating of the lamps(bulbs)?

 

lamp 1 watts + lamps 2 watts=total watts

total watts/(divided by)12V electrical system amps required+10%=fuse size, use next higher common size.

 

ex: 35 watts lamps

35w+35w=70 watts

70w/12v=5.8 amps

5a+10%=6.4 amps

next common fuse size is 7.5amp

If you are using a fuse correctly rated and it still blows, then there is a problem, shorted wiring, lamp socket, etc.

 

bkuhr, I think you hit it. My lamps are 35 watt. I guess I must have a problem somewhere. Not sure where though. I'll mess around with it some more this weekend. Bummer. But hey, at least they look really nice on the bike!!!