1800E relays

I am trying to get my heated rear window to work. It is a 1970 model with a two stage switch for the rear window. I think I know what the three relays under the bonnet on the right side of the car are(looking forward). I assume that the rear window works on one of the relays on the left. Can anyone tell me which one? There appear to be four things. The one nearest the back is larger and might be a voltage regulator. Then there are three, two round ones and one box-like. I think they are lights, horns and window? I have searched manuals but none show which relay is which and I still can't get a wiring diagram that is correct and which I can read the wire colours off and which has a code to the parts. ( The US diagram that Mister sent doesn't match my car, although it is a great diagram.) Any help out there ? Jock

This relais is placed under the dashboard near the fusebox. It's a little round one with I think a yellow wire which comes from the heater and a black/white one coming from the switch. At least that's how it's connected on my '73ES. You can check the colours off the wiring at the connection at the fusebox and the heater itself. Here's a pic: Keep in mind that this is from a LH, maybe different for a RH?

Relays 

I have seen the relay next above the fusebox, though I thought it must be a flasher unit. So I think my car must be the same as the 1973 ES. Thanks a lot. Jock