[Boismier]

Hey all, I'm rigging up some automotive lamps to use as passing lamps on my 2002 FXDXT. Not using the H-D passing lamp setup because (of course ...) they don't have one that fits with the FXDXT mini-fairing.

Got it all figured out except I'm not sure which fused circuit I should draw power from. After perusing the service manual and eyeballing the load on the various circuits, I'm assuming they either just tap the accessory circuit (but whaddoo I know ... ;-) or they connect direct to the battery for power with a relay connected through the accessory circuit (i.e a lot more work ...) so they can't be turned on when the key is out.

Can anyone who has H-D or other passing lamps on a newer Dyna let me know which fuse circuit they tapped into?

Thanks!

 

[FifthGear]

Can anyone who has H-D or other passing lamps on a newer Dyna let me know which fuse circuit they tapped into?

Thanks!

Boismier, the HD passing lamps come with a wiring harness. The main power lead is connected to the copper plated stud on the main circuit breaker. It has an inline fuse between it and a relay. From the relay a ground wire is attached to main vehicle ground. From the relay comes the wire to the low beam headlight wire with an on/off switch in between and a wire to the passing lamps.(from relay also). Hope this helps.

Later,

 

[Boismier]

Thanks Fithgear, that helps a lot. Don't know why I didn't think to go right to the breaker (duh ...). If I recall correctly, the circuit breaker is 'after' the ignition circuit, so there will be no passing lamp lights when the key is off. Back to the wiring diagram.

I'll fuse it and use a simple on-off switch without relaying through the high beam circuit, that way they'll stay on when the high beam goes on (shhh, don't tell anybody ... ;-)

 

[Rustler]

Originally posted by Boismier
a relay connected through the accessory circuit (i.e a lot more work ...)

Actually the relay is used to handle the load. The wires normally running to the handle bar switches are thin and are not rated for the kind of amperage driving lights draw. Typically 12volts from the battery (CB whatever) goes to a fuse and then to the source pin of the relay. The load pin of the relay is connected to the lights. 12 volts is also ran to the handlebar switch and back from the switch to the positive end of the relay coil. the other (ground) contact of the relay is connected to chassis ground. turn on the switch and the relay energizes passing 12 volts (source to load contacts - heavyier gage wire) to the passing lamps.