This may sound stupid but I need to know.

Could someone tell me what each channel is for on a Traxxas TQ3 receiver?

1 = ?
2 = ?
3 = ?

I know, battery, steering, throttle... I just don't know which order.

Thank you

1 is usually steering, 2 is usually throttle, 3 is usually for a transponder or an additional steering servo, there should be a fourth hole in the receiver for the battery if it's a true 3ch tranny. Some manufacturers reverse throttle/steering, so it's possible that's the wrong way round. Certainly that's how it is with Futaba.

On the tq3:
ch1=steering
ch2=throttle
ch3=shift
batt=receiver battery if running nitro or your ESC doesn't have a BEC.

Hey thanks guys.

Yep, top slot if for the battery (mine has it too)