Hi all, got an issue thats got me stumped.

About 10 years ago I started upgrading a first gen Heng Long (no smoke/sound) Tiger 1, promptly ran out of cash and the whole thing was shelved. I recently dug it back out and resolved to finish what I started. I picked up the latest Taigen control board set and fired the tank up for the first time yesterday evening.

Everything works fine (that I have connected that is, it's hull only at the moment), except for the direction control for the tank. In order to go forwards I have to pull the stick back, and to go backwards I have to push the stick forwards. Left and right works fine, so if I wanted to go forwards turning the tank to the right, I need to push the stick down/right.

I switched the plugs for the gearboxes and the tank now moves forwards when I push the stick up, but now left and right are reversed. So to drive the tank forwards while turning to the right I have to push the stick up/left.

I'm highly doubtful that its a problem with the control board and suspect its a problem with the wiring/gearboxes themselves. Unfortunately I got these metal gearboxes so long ago I cannot say who the actual manufacturer is or exactly what they are.

Any ideas? Any help will be greatly appreciated.

Try swapping the wires at the input plugs for the motors, right where it plugs into the MFU. Put the red wire where the black one was and vice versa.

It sounds like the motors are reverse wired. Try swapping the position of the black and red wires on each motor and then plug them back into the mfu jacks you initially had them in.

Dusty, I'm pretty sure that's what I just I said.

I just saw that. It looks like we replied at the same time. Great minds think alike!

Both great minds indeed, as your solution has solved my issue.

Thanks for the help, you've got this formerly dormant beast running and on its way to finally getting finished.

Between the two of us we can fix ANYTHING!!

Really glad to hear the problem is fixed.