Topic: Park position kills engine please help

[Ntdeamon]

Ok so i am nearing the end of a 5 year project. 81 cb650. I got the bike running great on pods and chopped exhaust. Carbs are fantastic. Charging system brand new. Everything is right. Only problem i have is i have no running light for my tail light. I have a brake light but no running tail. Both the pedal and brake lever trigger the light just fine. I rebuilt my key switch. The bike fires right up no issues. When i have the bike running and switch it to park it kills the engine then the tail light comes on. I have the brake light wired as follows. Brown to red. Green w/ yellow stripe to black. Then finally third wire which is green i have wired to straight green. It is a tc bros license plate/tail light kit mounted on the left side of the bike behind the axle nut.I cannot for the life of me figure this out. I dont know if the P is supposed to kill the engine or not when the key is switched to it. I completely unwrapped the entire harness inspected and re wrapped everything prior to assembly. Please can someone give me some guidance on where to start? This is my first cb650 and i really want to ride her before the season is up in pa.

[scottly]

The motor will not run with the key in the park position. The park position turns on the tail-light, and allows the key to be removed. It's only purpose, near as I can figure, is so that when you run out of gas, you can drain the battery while hiking to a gas station, while also providing a beacon with the tail-light for drunks to home in on.

[Ntdeamon]

Thank you so much! I could not find that info anywhere. It scared the shiz out of me! I thought i had to take my wiring back apart. As far as the tail wiring did i get the right wires feom the cb harness to connect to the tc bros tail kit? I followed this diagram.

[Don R]

 Look for that taillight connection in the headlight bucket if you've had that apart. Br to Br/W maybe? It also could be the start switch. Look on top of the back fender for the wire that's hot when the headlight is on.

[Gene]

Just for yucks, you could also try replacing the bulb. I know - but trust me.

[Ntdeamon]

I got the tailight to work but now i realise i have no signals. Got running lights up front but when i hit the signal switch the light on that side goes out. Could thid be a low battery? I cant wait to get out of work so i can diagnose!

[Gene]

could def be a low battery. Also check your grounds for the winkers. Could be a bad relay - but they're cheap.

[Ntdeamon]

I got a new flasher but its got i x l. Which wires go to what terminal? I am going to throw my battery on charge when i get home. Then i am going to test some connections and i will report my findings to you guys.

[scottly]

I got the tailight to work but now i realise i have no signals. Got running lights up front but when i hit the signal switch the light on that side goes out. Could thid be a low battery? I cant wait to get out of work so i can diagnose!

Undo whatever you did to make the taillight work and return to the original condition of "taillight works with key in the park position, but not with the key in the run position".
There is an error in the schematic: it shows in park, the red wire is connected to the brown/white wire, but it really connects to one of the two brown terminals, which lead back directly to the light.
In the run position, the schematic shows the two brown terminals connected to each other, but really connect one of the browns to the brown/white. The brown/white feeds the power to the taillight in run, and also the gauge lights etc, and is fed from the tail fuse, on the right side in the schematic, via a brown/blue wire. The brown/white and brown/blue are connected together in a 9 pin connector, below the fuse box in the schematic.

[Ntdeamon]

The reason why the tail was not working was a bad connection in the headlight bucket. I fixed that and it came on. I am going to bust out the drop light and check some stuff wirh the power probe. Darkness be dammned!!! I have waited five years to ride this bike!

[scottly]

Was the bad connection on a brown/white wire?

[Ntdeamon]

Yes it was. There was a butt ton of corrosion on the terminal. Took some sand paper to it and that was that. Every light works i rebuilt the gauge cluster and idiot light harness from scratch. Tested every connection on that its good. I have jumpers going from signal bodies directly to the frame. Horn works too. High beam low beam. Starter button, rebuilt the key switch. What am i missing?! Do the signals opperate without engine running?

[scottly]

So the only problem now is with the turn signals? With the key on, the signals should work, with or without the motor running, at least until the battery goes dead.

[Ntdeamon]

Ok i need some serious help this makes no sense. I took some jumpers and jumped power to the rear harness at my solder connections. The connection is good on both sides between the front and rear parts of the harness. The rear and front signals light as well as signal indicator so that circuit is fine. What on earth triggers this god for saken signal relay. I replaced the stock one with a novita EL13 electronic flasher. It has 3 terminals. X far left p upper and l far right. The diagram on the packaging says x is positive, p is indicator, and l is lamp. I have full power at the gw wire at the flasher. I dont undsrstand why this is not working. Where does the second wire that actually triggers the signals go. Is it ground triggered or is it triggered on positive? I just want to ride. Wife said i gotta have the signals first. I agree with that too. I may he younger but i am most certainly not dumb.

[Ntdeamon]

What are these two dual barrel connector grounds for? They are in the hl bucket.

[Scott S]

 Bad grounds can keep the signals from working. Also, is it the old flasher solenoid? They get "stuck" sometimes. A new solenoid is only a few bucks.

[Ntdeamon]

Electrical tape is good. Fresh from yesterday. That is a soldered connnection under there. My harness at the flasher has three wires. One green/white, one solid green, and one grey. I have the green white hooked to positive and the solid green to second terminal. That is what is shown by this diagram. I dont understand this. Is there any way to test a flasher? Should i just ground those two greens from the headlight bucket somewhere?

[Ntdeamon]

I got it!!!! It was so simple we were all overthinking it. I got sig nals!!!! I was sitting there messing with wires in the headlight bucket. I must have tugged on the fuse block harness because i look down and my right signal is blinking. I was like what the hell?! So i started investigating. There was the tiniest amount of corrosion on the signal fuse holder. I wiggled the fuse and boom no signals. The weird thing is the eest of the terminal was shiny as it was the first thing i looked at. Took the dremel to it with a stiff steel wheel and plugged rhe fuse in and she worked. Everything works. I hopped on and rode my ass all over town probably just put 40 miles on it haha. Thank you so much to everyone who helped me get this old girl up and riding. I have finally realized a child hood dream of owning and being a cb rider!