Ive got to admit since ure using sidelights to power the drls youre rear lights will be on anyway it does seem a rather pointless exercise and im sure somewhere there would be legality issues. Cars dont have them if u want to do it consideqg led strips near the rear fog and reverse lights. Mot inspectors are meticulous about lights especialy on the rear
In the diagram i have drawn i am only using the side light circuit to power down the light's or Dim them if i decide to dim them , with the relay, hence daytime running lights.They will be ON with ACC and controlled OFF or Dim with side light circuit.Volvo have used lights to the rear since the stone age so as long as i am showing correct colour and intensity i will not be breaking any law requirements.
My plan is to keep them as per my front DRL's away from the primary lighting circuits , as long as the rear intensity of the LED's are lower than the Brake light function.
The fact remains that Ford while constructing the Cluster have used a blanking plate that will not come out without breaking it , if you remove the light cluster and read the back of the lights the middle section has written on "12v Led" , not that i'm saying it was for a DRL.
If i go ahead and fit them , they will have to be inserted into the Side/Brake light section of the cluster , when i get all my parts and test it , then i will decide if iwant to go ahead and fit them.