Nissan Primera P12 rear brake / indicator lights

Hi everyone, I have a p12 2003 75k when I indicate left with my lights on and depress the brake the indicator clicks increase in tempo as if I have a blown bulb. When I remove my foot from the  break the clicking returns to normal, it happens on the left side rear lights but not on the right I have taken apart the left rear light and checked the bulbs which all appear to be working I am told in this situation , for example when I am indicating  and breaking that my break light fades and starts to pulse. this only happens when my lights are on,  when my lights are off, for example during daytime my indicator and break lights appear normal I would be very grateful for any suggestions.
Thanking you in advance,
Willie

Same problem was with my nissan primera P12. Its indicater flashes double when press brake and also front fog light sign on dashbord.

In this particular case it is 99% the rear earth fix

I must thank imckay too for his advice. I had the same problem as willie01. My husband and I fixed it this morning but my indecators still bleep (same warning noise as boot opening and seatbelt not fastened). Can anyone help with this, please?  

Hi timeshock!
No I don't have a towbar. It is definately a beeping rather than a clicking and it happens on the left indicator and it is a continuous beeping. On the odd occasion the right one will beep just once when you first put it. If we disconnect the battery will the radio reguire its security code?