Next up solder the four wires to the DCC NEM662 NEXT18 female socket to 14 wire adaptor PCB from BLW Technical Services Ltd on eBay.
With the chip connected I reprogrammed the address to 6 tested on the rolling road.
I wrapped as I did with the Thomas conversion the PCB and chip in Kapton tape to protect the chip from short circuits
The chip sits nicely in the space under the coal load. 
The motor is retained
by a single screw and spring clip.
Next remove the pick
ups from the inside of the chassis this will free the motor from the chassis.
Gently separate the
motor from its mounting frame
Clip away all the old
wires keeping the left pickup for reuse later.
Next solder new wires
to the pickups black left red right and 2 new wires onto the motor grey left
orange right.
Wrap the motor can in
Kapton tape and refit the pickups and refit motor to its frame.
Replace the assembly back into the chassis
Test run the motor
with a 9 volt battery on the grey and orange wires.
22/04/2024
Percy Annie & Clarabel together with a pristine Thomas body shell arrived from EBay £39.00 apparently Percy need new gears Something to keep me occupied during the rainy season! Yes after the body off Percy and removing the motor I could not turn the wheels further investigation reviled that the rear wheel set has had the crank pin forced tight against the coupling rods binding the movement a slight tweak with a Pair of long nosed pliers did the trick.
08/04/2024
Thomas arrives at Pix Valley railway
After a protracted journey of some 11 days Thomas arrived at
Pix Valley railway starting in Llandrindod Wells travelling
north to Argyle for a quick stop over back on the road on the 5th
heading for the A74M and onto the M6 and
M1 arriving at 09:15 on the 8th April.
Thomas need a little TLC an the odd fettle more will become apparent when he is in the shed however first impression he has a drive train issue.
Thomas was wheeled into the shed,
Body lifted from the chassis to show the extent of the issue the left side
pickup are twisted out of true, excessive oil and some gritty black debris (I
suspect loose ballast) around the gears the traction tyres X8101 are shot and cracks around the screw holes in
the base plate X8019 I have ordered up replacement parts I performed a
quick check on the motor with 12Vdc all seems to be working correctly.
13/04/2024
The replacement chassis arrived this morning and was test run on DC all working fine although he has a pronounced wobble.
The replacement chassis was stripped although had been messed about with big time the quartering was all screwed up on the wheels so the rods were binding. Strip down and investigated it seems that the screw which holds the motor to the chassis had been stripped and wasn't holding the motor in mesh with the gears. This resulted in the nylon gears being slightly damaged. Next requirement is to clean up and re-tap the thread in the chassis to hold the motor. The existing hole was deepened with a 1.55mm drill and tapped to 2mm a longer 2 mm screw from the bits box held the motor in place.
Thomas
wheel quartering commenced all the wheels were removed from the axels cleaned
and pressed back onto the correct quartering using my jig,
checking
the back to back with a gauge. It was obvious the wheels had be off and refitted
by eye!
