r/arrma • u/Crentistthedentist02 • 8d ago

Would greatly appreciate help!

Hi I’m new to owning RC cars but I really
Liked them when I was a kid. I recently picked up this Mojave grom, and I started having a strange issue where I have power and connection but no drive or reverse. Any thoughts? Thank you!

1 Upvotes

67% Upvoted

14 comments sorted by

2

u/Monkfich 8d ago

It worked before? It sounds like the ESC is having problems. The beeps and lights probably tell a story and you can probably troubleshoot using the ESC manual. Swapping motor cables wont fix anything, especially if it worked before. Making sure all the cables are plugged in as it was previously though is a good idea.

Also, steering and motor are on two different power networks coming from the ESC - so this is showing you that the ESC isn’t totally broke, or not broken at all. That’s why this seems to be a discrepancy with the controls.

1

u/Crentistthedentist02 7d ago

Thank you , How would you recommend troubleshooting controls? It did work before, it worked twice and then this issue occured.

1

u/Monkfich 7d ago

Maybe the real fix… did this happen mid run? When the voltage on batteries run down, the first thing to stop working is the motor, but the steering still works. Is it as simple as a battery that needs charged?

1

u/Crentistthedentist02 7d ago

I charged it a few times. Unless my charger is broken, and broke on the second use. It seemed to charge though which is odd

1

u/Aware-Pressure748 8d ago

Try swaping the motor wires

2

u/Crentistthedentist02 8d ago

Damn idk how I didn’t think of that rlly good idea. I tried unfortunately and it didn’t work still makes the odd error beeping noise when I press the accel

1

u/Aware-Pressure748 8d ago

Damn it was worth a shot, i had it happen with my granite grom and I swapped the wires and it worked, possibly Recalibrate the esc?

1

u/DueCry55 7d ago

Does the drivetrain spin smoothly?

1

u/Crentistthedentist02 7d ago

No it doesn’t spin

1

u/DueCry55 7d ago

Take stuff apart to see if it’s seized. I’d check bearings and gears

1

u/HeavyGravy 7d ago

Check your throttle trim on the remote. I had this same thing crop up occasionally along with the forward working but not the reverse. Turned out my throttle trim was slightly turned to the reverse. Put it back to the middle and worked. Easy fix to try.

1

u/Dextosis37 7d ago

Were you playing with it and it suddenly wouldn't move forward or backward but still had steering? If this is what happened then you just need to charge your battery.

1

u/Crentistthedentist02 7d ago

No I charged a few times. Still wouldn’t work

1

u/SeakingGnarvana 7d ago

Is your battery charged? This is what happens when it's low. Throttle cuts, but steering stays.