Wiring mini speedometer problems. HELP! (picture rich)

[surfish95747]

Hey guys, I have some questions. I am installing Dime City Cycles mini speedometer with LED indicator lights (oil, high beam, neutral, winkers). The only lights I have gotten to light up are the speedometer backlight and the High Beam indicator light (but it flashes off and on randomly).

I started out by clipping the original connector off of the speedometer wires



I then matched up the correct grounds (green and black/brown wire) from the original harness to the wires from the speedometer



The only one I have not hooked up is the winker yellow wire (from speedometer) to the two? orange and light blue wires from the original harness (I'm not sure what to do with both left and right wires from the harness).



Right now the neutral light and the oil light don't go on at all and the high beam light stays on most of the time, but it blinks off every now and then and then comes back on. But it does go on and off as i use the hi/lo switch. Any ideas as to why?

https://youtu.be/p49N9aOsirc

With the neutral light, I figured it would go on when I put the bike in neutral, and it doesn't I assume this wire going down in front of the front sprocket has to do with the bike knowing when it is in neutral?



The bike will start when I am in gear and then pull in the clutch (however the bike does try to roll forward when i start it in first clutch pulled in) but the neutral light does not come on.

If anybody has an idea to any one of my many problem please take a stab at it. Thanks guys!

[TOOLS1]

The black wire is a "hot" and should go to the neutral, and oil pressure light, they are hot all the time, and then the switches (I am not sure which wires go to them as I do not know what model/year you are working on) ground them out to make the lights come on. Green would be ground to the case. That is all I can offer with the information given. Hope it helps.
TOOLS

[surfish95747]

Sorry, this is to a 1980 cb750k. I thought the black wire from the speedometer was just the ground for the back light. So the + wires (red and green) for the oil and neutral need to connect with the black wire from the speedometer? Sorry, this just blows my mind. Thanks for the help.

[TOOLS1]

NO! The black is switched hot. It will go to one side of the neutral, and one side of the oil pressure lights. Then the other wire from each light will go to the switches. In other words, the juice goes through the lights to the switches for nut, oil pres. The dark green will always be ground.
TOOLS

[surfish95747]

Tools, I'm afraid I don't understand electrical wiring. This is what I have on my 1980 cb750k. I have the writes from the speedo connected as such. The colored wired listed in lower case and listed first are from the speedo and the wires capitalized are from the original wire harness.Yellow/black, blue/black and black connected to Green. I have red/black and green/black connected to Black/Brown. I have green connected to Light Green/Red. I have orange connected to Brown/White. I have red connected to Blue/Red. And blue connected to Blue. What needs to be changed to where? Sorry this is like having to explain it to a small child. Thanks for the help.

[surfish95747]

Tools, is this the black wire you are talking about? The one circled in red?

[TOOLS1]

After studying your diagram, it looks correct. The wire I was referring to as "black" is the bk/br wire, but the black one will do the same thing.
TOOLS

[surfish95747]

Okay so everything looks good how I have it wired? I wonder why the neutral does not go on at all. Also, I've seen you say I don't need some sort of resistor for the winker light wires. The handlebar switch takes care of that? When would I ever see the Oil pressure light go on? Thanks!

[TOOLS1]

The oil pressure light should be on when the ignition switch is on, and the engine is not running, or about to blowup. Make sure you have voltage at the switch. If you don't, you have a wiring problem. If you do, ground it out, and the light should come on. If it does not, you have a bad switch.
Same with the neutral switch.
TOOLS

[shinyribs]

Does that gauge work with grounded circuits?

The oil and N indicator on these bikes lights up the stock indicator light when that particular wire is grounded, not applied to voltage.