March 7, 2010
Repairing Suzuki headlights wiring harness and replacement lamps
Several months ago, I noticed that one of my headlights was out. No biggee right? There are two of them. Several days later, the other went out. Ok, time to replace the bulbs. As I had come to find out, it was not that simple. The plastic housing that the 3 bulb prongs went into was melted beyond repair and brittle to boot. The solution took a little patience, around $15, a soldering iron, and some shrink tube.
Tools and Materials: voltmeter, bulb socket (2), bulbs (2), soldering iron, solder, and electrical tape
Motorcycle: 2005 GSX 600; Suzuki Katana
Before starting, make extra effort to ensure that you mark the location of each wire on your bulb socket. The wiring harness plugs directly into the plastic headlight socket with very little slack. The wires were melted so bad that they had to be cut. Because the wires are so short, they cannot be reconnected to the new bulb inside the fairing, unless you are willing to disassemble the unit. I had to find new headlight sockets and purchase new bulbs. The socket was the most challenging aspect of the repair, as I had to find the correct sized 3 pronged hardware. This is what I came up with.
The bulb prongs have to be bent ever so slightly inward to be placed into this socket. The right way to reconnect the socket to the wiring harness was to solder the remainder of the harness to the new socket wires.
IMPORTANT: Before soldering place a 2″ piece of shrink tube on the wire so that it will slide over your soldered connection.
I would not worry about getting the correct wires soldered in the right spot, as you can take out the wires from the socket. Once you have soldered the wires together and placed the shrink tube ofunctioningver your soldered connection, go ahead and wrap some electrical tape over the shrink tube for good measure. Next, put your bulb in the housing and clamp it down. If you did this correctly, you marked the wires according to the previous location on your socket. If not, use your voltmeter to determine which connector is for the regular lamp setting, brights, and ground and do a bit of trial and error. Before inserting the bulbs, I gently placed the wiring harness on my fairing and determined if my wiring was correct. Otherwise, you will have to take it apart again!
The result was an extended wiring harness with about 6 inches of slack wire and functioning headlamps.



























