SCX24 HRZ00015 ESC dead after plugging 4WS Servo

[Jeffh555]

Hey everyone…

I have a SCX24 JLU with the V2 electronica that I’m swapping to a Injora buggy with 4 wheel steering.

When I tore it down, it had a dead motor from 5 year olds abusing it. I.e. holding it in place to do 4 wheel burnouts in dirt.

Got it all together with a new Injora motor, and everything works except it only goes backwards.

After some research I concluded that my ESC was bad. I figured it was from the kids abusing it. The motor was really crunchy, and I wouldn’t be surprised if they held the throttle down after the motor went and the current caused the ESC to die.

I ordered a new stock ESC/receiver combo. While waiting for it, my buddy leant me his spare V2 ESC/receiver, he gave me the transmitter with it. Plugged everything in and the same thing happens, no reverse.

I have a spare motor and an entire spare SCX24. These ESCs won’t spin any motor both directions. The one good ESC will spin any motor both directions.

Pulled the original ESC out of the case, and can’t find any components that are melted or otherwise look failed. Never got any smoke or bad smells.

Is plugging the Emax servo into channel 3 killing my ESC? I’m scared to try the remaining good ESC that I have.

Thanks for any help,

Jeff

 

[Jeffh555]

I now have 2 theories.

1. The motor installed in my buggy is bad and pulling too much current. connected it directly to a battery and it spins both directions. I put a cheap china multimeter in line and it pulls .37-.38A in both directions. This is spinning the whole drivetrain in the air. I doubt this is the issue.

2. The rear steer servo is bad. I pulled the ground wire and put my multimeter in line with it. It will pull .72A at one direction steering lock, but the other direction only pulls .1 max while moving, an nothing once it gets to steering lock. The specs for the servo (emax ES08MAII) state its max current is .9A.

Tonight I'm going to test my spare emax servo to see if it also has more current one direction than the other.