Join Date: May 2013
Location: Concord, CA, usa
'99 900ssie Critical Headlight Wiring Issue - HELP!
Hi guys. This is a bit of a mission-critical kind of thing. As my car goes into the body shop tomorrow morning I need this bike to get to work. So this issue has to be resolved yet today/tonight.
PO installed a LED bulb which sucked. Last week I installed a H4 Hella 130/90 bulb. Now before you start, I know this bulb was not going to perform at it's max due to the stock wiring being so light, But I was planning on doing the relay with large wires direct to battery thing this coming week. Figured I could get by for the little riding I would be doing from then until now.
But Friday the headlight died. Thought it might be the fuse. Nope, not the fuse. Then maybe the bulb. Not the bulb. Time to tear everything apart and start chasing wires.
What I've determined so far. No power at the bulb socket. No power at the high/low switch solder points. But there is power at the connection of harness to left-hand controls. And here's where it gets really weird. As you can see in the photos, the high/low switch has black/green/white wires. The harness side connector has black/green/white wires and there is power at the black/green wires.
The catch is, and you really have to study the 2 connectors to get this, the controls side black/green wires DO NOT line up with the black/green wires on the harness side. The black/green (hot) wires line with the blue & grey wires on the controls connector. (in the photo the grey wire is immediately adjacent to the blue wire but look white) And I'm unable to determine where those wires go to. In fact to add to the confusion the high/low flasher switch has white w/blue and yellow w/green wires that don't show up at the connector at all.
To be certain, I did double check the wires on the control side. the black/green/whites wires to terminate at the connector as the black/green/wire wires. However (FWIW) the 2 wires for the high/low flasher do not terminate at the connector at all. But one can see the wires of the high/low flasher going into the wire wrap heading toward the connector. But, as I said, they don't show up.
Finally, the wires going to the headlight are black/white and yellow w/black
As you look at the photos the male connector is the left-hand controls and the female connector is the (bike) harness.
Hope this makes sense.
I'm confounded. I've done automotive wiring before but you could count on the wire colors being consistent from one end of the car to the other. In this case there seems to be no consistency. And I NEED this bike to work tomorrow morning!
06 Ducati ST3s (in the rebuild process)
'99 Ducati 900ss (literally bone stock w/8k miles)