Townmate t80 indicator problems

Do I need some help with this problem!!!
Mot returned that rear indicators not working. Couldnt see a problem so replaced the 2 rear indicator lights in whole. Still not working, fitted new relay, still nothing. Front indicators are weak but work ok. But nothing to the rear. Anybody got any ideas where the wires should fit on rear lights as I may have mixed them up.
I think there is a wiring problem but not sure how to find out. Would really appreciate some guidance on this.

Hi check out this wiring diagram may be of help
https://yamahatownmatet80.forumotion.co.uk/t233-townmate-wiring-diagram

Most likely an earthing problem (see also a previous thread on this subject https://yamahatownmatet80.forumotion.co.uk/t277-flashers-not-working) also bulbs should be 6v 10 watts, maybe wrong bulbs have been fitted to rears.