USAT Motor block

A little help please - I want to do a quick chipping of a USAT 22 switcher tonight, but I don't know the pin outs from the motor block. There are 4 wires - 2 black outer & 2 red inner - does anyone know which is which ?
 
Thanks

Hi
Take the wires off the motor block (making a note of which comes from which) put the block on the rails, apply power and use a multimeter and touch in turn, to the two pairs of red/blck wire points When the meter shows a voltage, that will show the two pickup wires. The other pins will be the return to the block from the circuit board. If my memory serves me correctly the two outer are the pick-up ones but I could be wrong!

beavercreek


Hi
.....If my memory serves me correctly the two outer are the pick-up ones but I could be wrong!

Nearly But not quite right.  There are four terminals on the end of the block, in two groups of two.  The outermost terminals (ie, 1 and 4 as you count across) are the motor, and the other pair (2 and 3) are the track pickups, and are wired to the wheels/shoes they're closest to. 

Jonathan
RDE

Thanks guys - I appreciate your help.

Whoops
just checked on my test bed and I was wrong....but I did say I could be wrong
Glad you got the correct pointer