Electrical help needed!

[Qfactor]

hey guys

I found out why my speedometer doesn't work since the crash.

it seems that 2 signal wires were severed off right at the base of the connector to the PCB.

I need someone's electrical expertise to solder the whole thing back together without damaging the PCB.

I have very limited electrical knowledge. This is the last thing to get the bike to be legal enough to ride again.

any help would be very much rewarded with->

Q

[Qfactor]

well,

took it to work, consulted with an EE tech (got lucky they usually are never around). Got handed a junk PCB and some solder and an iron to practice.

then did the "deed" to the real thing with low temp solder.

came out ok, not the prettiest job, but it checked out ok with the multimeter.

I learned how to solder today, I am very happy about it.

Q

[benVFR]

Awesome...

Yah that is the way to go, do it on a bench.

I had done it a lot in HS and early in college, never had much trouble...

Then you try to do it leaning over your bike in a small space, bad light, etc.. and it's a lot more annoying.

[rice_rocket]

How do most speedometers work? I just got a bike and the speedo doesn't work at all! Bummer!! I need to try to track it down/figure out how to trace it..

[ZX-12R]

There are 2 common styles of speedometer in use today. The first type uses an inductive sensor to count teeth on your front sprocket or on a gear/spline inside your transmission. The computer keeps track of the rate of the incoming pulses and uses that to determine speed which is then displayed in the console.

The other type of sensor uses an encoder mounted in the front wheel hub. As the wheel turns, a specific number of electrical pulses are generated each revolution. Just like the inductive sensor listed above, the computer keeps track of the rate of incoming pulses and uses that info to calculate speed.

In older applications there may not be a computer involved so a number of discrete electrical components are used to convert the pulses into an analog voltage which is used to power the speedometer on the bike.

[rice_rocket]

I did more digging around on the katana forums and there is indeed a speed sensor somewhere near the sprocket in the transmission. I can't figure out exactly where or how to get to it. I imagine if I pull all the plastic pieces off the bike I'll be able to trace it. The next thing is the difficulty I am having finding a place to buy a replacement sensor!!

[Eric Baker]

^What's your bike?

[rice_rocket]

I'm in Natick, MA... not sure if the bike will pass inspection as is.. we'll see. I took out the speedo sensor and cleaned it up, with no luck. The sprocket cover wasn't scratched or cracked... so tomorrow if it stops raining I'll trace the harness and check with the multimeter if I have continuity..

[Jim]

holy bumpage batman

[rice_rocket]

Lol yeah, I'm kinda busy trying to get this fixed before I get it inspected.. I assume it will pass without the speedo though since it doesn't have to be in motion, but it certainly would help me driving

I mis-read I thought you said where is the bike.. not what is the bike haha.

The bike is a 99 GSX600 Katana