tr7v8 wrote:
Multimeter job unfortunately. I worked my way through & connected it to a choc block then used an ISO connector from there. One important wire is the black (I think) that is laced in with the aerial lead, this powers the aerial amp on the bottom of the windscreen in the later cars & needs connecting to a 12 source switched by the radio, normally elecy aerial output.
nice one!, i wondered why my reception was crap. just hooked up the black wire and its so much better

my stereo was a bit messy as i think its had an after-market 10 speaker system fitted so possibly not a standard loom. luckily i had pinout of both head units so was easy enough. 12v from car will usually have a fuse on. supply in mine was yellow and red wires, cant remember offhand which was ignition and which was permanent but i had to do some swapping to get it to work. Antenna was a thicker coax cable with the black wire taped to it ending in a small spade connector.