[quote name='hawker' date='30 April 2010 - 09:26 AM' timestamp='1272615397' post='80033']
I installed rear parking sensors in the missus' car about a year ago (Citroen Xsara Picasso), and found it a pretty easy job. I got the ultrasonic type (the ones that you see the round sensors drilled into the bumper)
A while back I bought an electomagnetic type which involves no drilling of the bumper. Its basically a foil strip that you stick to the inside of the bumper.[/quote]
I've got them front and back,first had them on the Volvo S40. Wife insisted she wanted them on the Focus, so I just took the two PA ECU's from the S40, and bought all the other kit for both set ups circa £26 all in.
My questions are
1. How easy is it to remove the back bumper? Is there a guide anywhere?[/quote]
No need to remove the rear bumper mate, I just laid on my back under the car, my short drive slopes upwards to the pavement, which then slopes ever so slightly down to the road, so that made it easier by positioning the rear of the car there. Or you could just pop the rear axle on a couple of axle stands. But at 63 years old I have a bit of a belly on me [ its an age thing, and spending most of my time sat at the PC
] and I managed. Anyway clean the whole length of the rear of the bumper just below where the rubbing strip is situated [where your going to a fix the antenna]. It has a wire harness clip set up on it, supplying the rear fog light supply.
Right,your going to fix the antenna from right to left [ when viewed laid on you back under the car, reversing light side] wrapping it around the bumper a bit [but at least 20cm away from the rear tyres] Running the antenna around the both sides of the bumper, means it will pick up obstacles to the side of the bumpers if your reversing line is off a bit....or your a girl
So fix the antenna as near to the rear of that rubber bumper set up, but leave enough space to allow you to go over the antenna for its full length with duck tape. [stops the antenna coming lose and also it will protect it from the elements, but it is really clean up there, but it's considered best practice] Mount the sensor ECU behind the boot lining NS rear, pick up the earth connection for the ECU feed in that area via a bolt on the bulkhead. Shove the live feed and the wire that connects to the antenna through a grommeted hole [already there]. Connect antenna wire, then cover and secure it to the bumper [I used that black sticky gunge stuff that come with the kit [ same stuff you use to fix the ECU to the bulkhead in the boot space.
[quote]2. I need to get power and earth from the reverse light bulb. What wire going into the reverse light bulb specifically do i need to splice to get power, and where is the best point to get earth from?[/quote]
I then spliced into the reversing light feed behind the rear bumper[that way I knew I was getting the right wire, and not the one for the rear fog light if I attempted to make the connection in the boot]
I also run the speaker wires behind the boot side covering then poked the wire through to the bottom of the rear seat near the NS rear door. You know where that little bits and bobs place is at the end of the seat near to the door. Well I just fixed the speaker there, it's not noticed and not in danger of being knocked off its perch, but you can certainly here it.
[quote]Has anyone actually fitted a rear parking sensor on their focus? How did you find the task? Are there nice channels that wires can be tucked away neatly etc.?