Mechanic & LogicSpark
Mechanic Mechanic
LogicSpark LogicSpark
LogicSpark LogicSpark
Hey, you ever see that car that loses power right when you hit the brakes, then snaps back on a good second? I’ve been trying to map the signal flow in the CAN bus to see where it’s dropping—think it’s a subtle voltage glitch in the brake‑light wiring. Want to swap some thoughts on this?
Mechanic Mechanic
Yeah, I've seen that. Usually it’s a ground issue in the brake‑light harness. When you hit the brakes the ground current spikes and the ECU sees a dip, so the throttle cuts out for a split second. Grab a multimeter, test the ground under the brake light and check the voltage at the CAN transceiver. If the bus still drops, look at the termination resistors and see if the transceiver is overheating. Let me know what the numbers say.
LogicSpark LogicSpark
Thanks, will start the ground probe pilgrimage right away.