Wiring honeywell DT200(T6620B)

hope this helps

6 pin socket

6 pin plug

7 pin socket

7 pin plug

5 pin socket

5 pin plug

7 pin socket

7 pin plug

7 pin socket

7 pin plug

7 pin socket

7 pin plug

12 pin socket

12 pin plug

small 6 pin round plug & socket

1 tail, clearance - brown

2 left hand turn - yellow

3 right hand turn - green

4 stop - red

5 electric brakes - blue

6 earth - white

small 7 pin round plug & socket

1 left hand turn - yellow

2 reverse - black

3 earth - white

4 right hand turn - green

5 electric brakes - blue

6 stop - red

7 tail, clearance, side markers - brown

round socket

large 5 pin round plug & socket

2 left hand turn - yellow

3 earth - white

5 right hand turn - green

6 stop - red

7 tail, clearance, side markers - brown

large 7 pin round plug & socket

1 left hand turn - yellow

2 reverse - black

3 earth - white

4 right hand turn - green

5 electric brakes - blue

6 stop - red

7 tail, clearance, side markers - brown

7 pin round heavy duty plug & socket

1 earth - white

2 left hand rear , clearance and marker - black

3 left hand turn - yellow

4 stop - red

5 right hand turn - green

6 right hand rear , clearance and marker - brown

7 reverse/auxilary - blue

7 pin flat plug & socket

1 left hand turn - yellow

2 reverse - black

3 earth - white

4 right hand turn - green

5 electric brakes - blue

6 stop - red

7 tail, clearance, side markers - brown

flat socket

12 pin flat plug & socket

1 left hand turn - yellow

2 reverse - black

3 earth - white

4 right hand turn - green

5 electric brakes - blue

6 stop - red

7 tail, clearance, side markers - brown

8 battery supply - orange

9 auxiliaries - pink

10 earth - white

11 rear fog lamp - grey

12 auxiliaries - violet

what type of system are you wiring it to???? for general info b and o are used if heat pump system, g =fan (blower), Y =cooling (ac), W=heat, R and rc are 24v feed to stat, do not use rc if system does not have cooling. if it does and 24v is from one source then connect fed to r and install jumper between r and rc . you list wire colors you must identify where they are connected at other end.

green or green and yellow is the ground (earth), blue is neutral, black and brown are both lives. this is the standard european wire color code since 2004. If it is older than that, black was used as a neutral, and blue as a live. very confusing.

Hi , you need to make sure rc and r are jumpered together.
R=red
G=green
W=white
Y=yellow

Blue is probably the other side of the transformer (24v) and usually would go on "c" if the thermostat has that particular post. To know for sure where blue goes, trace back to the furnace. Blue will be attached to a marked terminal either on a transformer or a circuit board. Hope this helps you.

The honeywell THR830TUK thermostat does not require a neutral as shown in the instructions.Connect the LIVE to terminal "1" and your YELLOW SIGNAL wire to terminal "3".
Connect your EARTH (if you have one) to the EARTH connection on the top left hand corner of the thermostat and blank off your NEUTRAL wire with a block connector.These instructions were supplied to me by Honeywell Customer Support.Hope this helps.

The colour codes are as follows:
Brown = Line / Active
Blue = Return / Neutral
Green/Yellow = Earth / Ground
It is likely that the Brown and Orange would be connected together but not 100% sure.

treat the blue as if it were yellow

Take white off of Aux, and attach it to L

I think I've done it - but don't take this as absolute truth.
For the Honeywell T6360B the original Potterton wiring should be rewired as follows:
Brown [Live] goes to terminal 1; Blue [neutral] goes to Terminal 2 and the yellow/green [which is not an earth but a switched live - i.e. gives live to the heating system when the thermostat clicks in] goes to terminal 3.
Obviously all done with the power isolated and when it was switched back on we had heating again :o)
It's been on over two hours now and all seems fine.