Gear position sensor/ neutral indicator.

[norm wilding]

I'm building a custom bike using the Busa motor. I'm not using the Factory ECM or wiring, but want to have a neutral light. Anyone know if the oem gear position sensor could be used to operate a neutral indicator light ?

 

[michael parris heuberger]

I'm building a custom bike using the Busa motor. I'm not using the Factory ECM or wiring, but want to have a neutral light. Anyone know if the oem gear position sensor could be used to operate a neutral indicator light ?

HI. What do you want to use? I an going to use a MAXX ecu. I would call Eric at DAS #978-453-0807.

 

[Dennis]

Yes. Two wires are connected when in N. The other is used for resistance to indicate gear selected. I don't remember which are which, but it is easy enough to figure out with a meter.

 

[rubbersidedown]

I'm building a custom bike using the Busa motor. I'm not using the Factory ECM or wiring, but want to have a neutral light. Anyone know if the oem gear position sensor could be used to operate a neutral indicator light ?

to the Org...and your first post. Gr8 site,awesome people.
The GP switch has 3 wires. Black,pink and blue. Testing resistance across the blk and pink will give you 7 levels of resistance.1 level for each of the six gears. Neutral will show zero. For your modified bike to get a working neutral light it will have to get +12V from somewhere and I'm guessing the blue wire could be used to complete your new circuit,used basically as a switch. When your trans is in neutral,it would close the circuit. I think...
Perhaps put your new neutral light to ground and also to the GP switch. Feed the pink wire +12V. When the switch is in neutral it should feed 12V to the blue wire. I think...
Rubb.

 

[202mphbusa]

not 12v
5 volts feed not 12v please

 

[202mphbusa]

there is one 5 volt signal coming OUT of small connector #14 on the ECU
that tee's off and feeds
GPS
TPS
IAT
Coolant temp
Busa Board buddys still on my first cup of coffee what others am I forgetting?

 

[202mphbusa]

Oh yeah map and factory Baro sensor

 

[norm wilding]

Yes. Two wires are connected when in N. The other is used for resistance to indicate gear selected. I don't remember which are which, but it is easy enough to figure out with a meter.

THANKS DENNIS. You were right. Blue and black form a continuance in N. So I fed a live to the neutral light, and ran the ground through blue and black of the gear position sensor, and it works perfectly..... Thanks again, norm.

 

[rubbersidedown]

not 12v
5 volts feed not 12v please

DOH! my bad... 202 to the rescue.
I should just learn to keep quiet.
Rubb.

 

[smithabusa]

blue wire becomes a ground when in neutral. red wire if hooked to a 5v pullup resistor like in the busa ecu will read 5v when in neutral.