VAF Forums

VAF Forums (https://vansairforce.net/community/index.php)
-   Traditional Aircraft Engines (https://vansairforce.net/community/forumdisplay.php?f=21)
-   -   Lightspeed Plasma III Wiring (https://vansairforce.net/community/showthread.php?t=171421)

Vans101 05-10-2019 08:06 PM

Lightspeed Plasma III Wiring
 
Does anyone out there happen to have a Plasma III for six cylinder laying about where you can help me trace the wires from the hall effect PC board to the 15 pin input connector?

As I mentioned before, the 15 pin input connector on my Plasma III had to be cut off to remove the engine (firewall hole was too small and I did not want to unbolt the prop to hang the timing sensors loose) so now I have to field install the 15 pin connector.

The installation manual is well written however it does not state the colors of the 9 wires that run from the crank sensor PC board to the 15 pin connector.

If I knew what colors the wires were that powers channel A / B / C then I could deduce the respective black and bare wires.

Inside the single large cable are three shielded sub-cables and each sub-cable has a black wire, a bare non-insulated wire, and then the third wire is the only difference and that would be either a white or green or red wire.


Can you please tell me what color wires are connected to the following pins:


Channel A:

PIN 3 of the HALL EFFECT sensor is a ??? wire and it connects to PIN 4 of the INPUT CONNECTOR (this is a 5 VDC power to the HALL EFFECT sensor and it shares PIN 4 with channel C) If I knew what color wire was Channel A then I could deduce the respective black and bare wires.

Channel B:

PIN 7 of the HALL EFFECT sensor is a ??? wire and it connects to PIN 5 of the INPUT CONNECTOR (this is a 5 VDC power to the HALL EFFECT sensor) If I knew what color wire was Channel B then I could deduce the respective black and bare wires.

Channel C:
PIN 4 of the HALL EFFECT sensor is a ??? wire and it also connects to PIN 4 of the INPUT CONNECTOR (this is a 5 VDC power to the HALL EFFECT sensor and it shares pin 4 with channel A) If I knew what color wire was Channel C then I could deduce the respective black and bare wires.


If nobody has one of these systems opened up or accessible with the prop off then I will sadly need to remove the propeller...Grrr.

Any help would be greatly appreciated!!!

dtw_rv6 05-11-2019 04:49 AM

I would unplug the harness completely at both ends.

Next use a jumper to ground one wire at a time to the airframe. Go to the opposite end and check what wire has continuity to the frame. Do that for each wire and you will know the color/pinout. Even easier if you still have the connector end you cut off.

I don?t think I would trust colors to be consistent in a manufactured harness.

Don

rvdave 05-11-2019 08:33 AM

If it’s only the phase wires you are uncertain about I believe it doesn’t matter which inputs are selected because they are only channels, you can find out which outputs they correspond to and change the coax outputs.

Vans101 05-11-2019 09:59 AM

>I would unplug the harness completely at both ends...Next use a jumper to ...

Good thinking and I thought of that however the propeller is still on.

I have a trip to do so HOPEFULLY during the next couple of weeks some kind Vans Enthusiast who just happens to have a Lightspeed Plasma III uninstalled would stumble upon my thread and provide me with the wire colors...please please ...PLEASE!!!

If not I will need to remove the propeller to gain access the hall effect sensor ...as I understand it the sensor end is not a D-Sub plug it is actually a PC board with wires holes arranged and numbered like a 9 pin D-Sub.

Drats...if I had only removed the propeller in the first place...Grrr

dougnlina 05-11-2019 06:23 PM

Who not just call Klaus. He is grumpy but has been helpful anytime I have had to call him.

rvdave 05-11-2019 10:42 PM

Do you have the dual crank sensor circuit board? If so I just removed one to upgrade to mini sensor, maybe that would help? I can maybe take photo.

dtw_rv6 05-12-2019 05:38 AM

One more try
 
Another way would be to guess. Pull a spark plug from each cylinder but leave it connected to the harness and ground it to the engine. They will spark one coil at a time as you pull the prop blade around, telling you whether you got it right. Make corrections and re-check.

Good luck!
Don

deek 05-12-2019 07:50 AM

Quote:

Originally Posted by dougnlina (Post 1345892)
Who not just call Klaus? He is grumpy, but has been helpful anytime I have had to call him.

^^^^ This. Klaus will frequently answer the phone and e-mail on the weekends and evenings. Suggest you read the manual one final time before calling him though :D

rvdave 05-12-2019 07:55 AM

I did the same thing to repair my plasma 3, here is a photo of diagram I wrote down while repairing it.



Deweyclawson 05-12-2019 09:12 AM

LSE III
 
I have dual LSE III on my RV10. No motor right now so everything is in the open.
I am on the way to the hanger now. text me at 724-622-0939 and I will take pics of whatever you think will help.


All times are GMT -6. The time now is 03:42 AM.