problem launchcontroll

[Jona$]

Installed launch controll msd 4350 with activating with brake and worked good, took it out and tried it out, worked flawless.
washed down the sled and went for a ride 3days later, but as soon as i started the sled the light on the launchcontroll started flickr, like it was seeing positive voltage, when i reved up it got steady so it really saw voltage... But the taillight was normal and only shifted when i applied brake. if I just touch the wires just before the sensor at the brake lever it goes of but seem so little that i cant find a place to fastned it? but the weird part is that isnt enough to make the brake light go on or of, for that I need to apply brakes.

No i havent messured the current yet, but shouldnt the launchcontroll go on 12v.
And why now... seems strange. Wanna have it on the brake lever and not another button to squeeze in near the thumb.

 

[FLYBYU]

Launch works with ground with blue wire. For 12 volt activation use the blue/white wire. Why are you spraying down electronics?????.

 

[FLYBYU]

Instructions:
www.msdignition.com/instructions/Produc ... pdf‎

 

[FLYBYU]

Installed launch controll msd 4350 with activating with brake and worked good, took it out and tried it out, worked flawless.
washed down the sled and went for a ride 3days later, but as soon as i started the sled the light on the launchcontroll started flickr, like it was seeing positive voltage, when i reved up it got steady so it really saw voltage... But the taillight was normal and only shifted when i applied brake. if I just touch the wires just before the sensor at the brake lever it goes of but seem so little that i cant find a place to fastned it? but the weird part is that isnt enough to make the brake light go on or of, for that I need to apply brakes.

No i havent messured the current yet, but shouldnt the launchcontroll go on 12v.
And why now... seems strange. Wanna have it on the brake lever and not another button to squeeze in near the thumb.

I really hope you didn't hook that blue wire to the brake light wire. Always read instructions before installing electronics!!!!!!!!!!!!!!!!

 

[Jona$]

Whats up with the million !

YES i did as the manual said! it shouldnt worked if i didnt connect it right, i also soldered and put Heat-shrink tubing on the connection.

Spray? if you mean cleaning the sled, offcourse should be able to clean the sled without problem...how else will it handle snow?

And as i said it seem if just touch the cables coming from the sensor at the brakelever it starts flickering. But its not enough to get the brakelight going.

The cable with sensor are new, but could it be worth changing it. And can the launchcontroll be activated under 12v? since the brakelight dont goes on it cant be 12v.

Gonna try messure any current tomorrow.

 

[FLYBYU]

As I previously said it's made for a ground circuit. The brake circuit is a positive 12 volt system. The only way to use brake switch is with a relay to reverse polarity. Directly from MSD: Activation Wire. When grounded, the launch feature will be active. The harness is supplied from MSD for a ground activation.

 

[Jona$]

I use the harness, and directly from msd it says:
"WHITE/BLUE Activation Wire. When switched to 12 volts, the launch feature will be active"

if it would only work grounded there wouldnt be any use of switching place, as i se it cant be more obvious with that the manual says white/blue 12v will activate.

But let say i use a relay, what relay can convert it from + to -

And yes its supplied with ground since as they say many use clutch for bike etc and then use ground but they also say that you just shift to blue/white instead for blue and voila it kicks in on + it kicks in..

Im more curious why it kicks in now and under what assume 12v since the brakelight goes on... gonna have closer look in the morning.. at the worst i will have to make button for it.

 

[FLYBYU]

This way. Bosch 30 amp relay

 

[FLYBYU]

This is the important part of it!!!!
The harness is supplied from MSD for a ground activation.

 

[Jona$]

Thanks for the relay if it works, but as regarding the other post, So what? as i said and the manual says: yes it comes preppared for ground activation BUT can be switched to blue/white and then use it to be activated with + instead.

That is just what i have done, and it says 12v activation...weird then that it lights on even do the rear light isnt light.

 

[Jona$]

and i gues its a closed relay and doesnt need to be a 5pin since that dont get used.

 

[Jona$]

6.8-7.0v so did the relay mod and it worked, now for try it on the real life situation.