relay board and grounding issues? "letting out the smoke"

[Thorkhild]

I installed 2 bip373s on a second heatsink on my v3.0 MS1 and tied the grounds to the bottom of the r43.

The control go through S4 and S5.

I didn’t add a separate db15. I just used S4 & S5 and I am using a relay board.


Question is, Is the ground lines on relay board circuit board strong enough to handle the ignition plus everything else ?

Reason why I ask is, I think I am burning up my relay board. I am not sure if it is because of the grounds or something else.

Can I just jumper from the relay board near the db37 to ground? Or would it be better to run a separate ground out of the MS1 case straight to ground from the bip373 ground pins ?

I am using shielded cables inside my relay cable for the ignition control and my VR in.


Thanks

Eric

[Thorkhild]

Well it turns out the trace on the relay board for the s4 position was not up to the task. So I added a jumper wire from the pins on the underside between the db-37 connector and the s4 connector.

burnt2.png

[gtmdriver]

That's interesting.

I'm running an MS2 V3 and a relay board and I'm directly driving a Ford wasted spark coil pack and 2 banks of 2 high impedance injectors.

I'll keep an eye on the relay board. Thanks for the heads up.

[Volky]

Hi,

I did not have your issue but I soldered a wire on the underside on a few traces, too. Better safe than sorry. :shock:g

[Thorkhild]

I ended up doing the same by adding extra wires under the relay board for my ignitor signals.

[Volky]

Thor.....

How did it work out?

[Thorkhild]

Its all good now !! now I just have to find time to tune.

And, fix all my turn signals, headlights, brakes ..... the usual aircooled maintenance required asfter sitting a while.