Does anyone have a wiring diagram with colour codes for the tail lights on a Mk1.

OK, looks like I'll have to buy my own workshop manual.

If you're fitting a towbar then all you need is a 12V tester probe and turn the light in question on and probe the plug that goes to the light.

You don't say what year the car is, if its late MK1 it could be can-bus and you need to be carefull if your not going to cause problems:(

Saving money by fitting a Fabia towbar loom to the octavia taillights,

http://http://www.witter-towbars.co.uk/catalogue_articles/i_fit.aspx

Somewhere here you should find the socket wiring diagram, trace the wires that correspond with the pin numbers on the socket and record the wiring colours.

Switch your lights on in turn and record which wire does what by probing the light plugs and record the colours. I always solder, scotchlocks are asking for trouble in the future.

Find out first if your Octy is can-bus, it can lead to allsorts of problems!