mat_fenwick wrote:Originally, as you state, there is no ignition switched feed to the radio, so it could have been taken from anywhere. I chose to take both the illumination wiring, and a switched supply from the (digital) clock.
What do you mean by part heat rear screen? Can't see how an earth issue would affect it other than a high resistance earth making it heat up less.
Thanks Mat. I noticed the clock had one feed I think tappped into, there was a chocolate block there prior to feed into clock with two wires covered in black insulation tape. One obviously feeds on to the clock + the other single connection. I'll have a good poke around, as I have to sort the rheostat on the fan, which I got working OK but it has become intermittent (along with heat!, hopefully just total flush out), thanks to the tech stuff on here I'll try the 2nd earth point, and for the heater not sure if I need to dismantle the tap yet as I really do not want to risk breaking anything or causing a leak afterwards. Quite OK dropping the column etc but removing the n/a heater hoses could be fun....
Vanny's write up is pretty good.
On the rear screen heat, you got it, it seems less powerful than it should be, I'll clean up the earth. Even a relatively clean car can have issues when they are this old....

and this car is 'new' to me so I have yet to learn it's quirks.