High pitched whine - engine running

**kee1173** · Friday 25th March 2011, 21:48

its the earth out of the back of the HU, you need to connect elsewhere... they are normally labelled on the cable...

**kee1173** · Friday 25th March 2011, 21:50

Bloody hell it works gettin g good at this link thing ....LOL

**Giles** · Friday 25th March 2011, 21:52

Originally Posted by kee1173

its the earth out of the back of the HU, you need to connect elsewhere... they are normally labelled on the cable...

I have the manual.......i have just tried again.....wire to case/HU to un-painted bolt....noise gets worse.....

I will RTFM but i am sure there are no hints on earthing....apologies if they exist, i shall dig it out now

**Giles** · Friday 25th March 2011, 22:04

http://forum.realmofexcursion.com/he...pico-fuse.html

**Giles** · Friday 25th March 2011, 22:04

Could be the RCA's....but i can't re-route them.......

**kee1173** · Friday 25th March 2011, 22:19

if all original bar the head unit, and it was ok with the old head unit in, i would say its down to the new head unit and its an earth of some sort, did the new HU loom just plug into the Loom from the car or did you have to modify it...if you had to modify/ cut into it then check the wiring especially the earth wire, see if something is touching..and maybe move the earth from the head unit that wired into the old loom and earth this onto bare metal seperate.... mind you have had to change alternator suppressors in the past....its got to be some thing simple and what you say all points to the earth....

**Ed.** · Saturday 26th March 2011, 09:43

If you can't find the source of your alternator whine, or can no longer be bothered to, try http://www.caraudiodirect.co.uk/rapt...supressor.html

A purist would regard this as a bodge rather than a fix though.

Ed

**Rnash2002** · Saturday 26th March 2011, 13:40

Ok i have the same wire and whine noise,think i gave you the link Giles.
Ok was out today and managed to get shot of the noise.
Right i took the black wire(earth) and put it together with the other 2 wires(green and white),on the back of my radio i had a thread and nut in the middle i undone the nut and wraped these wires around the thread then done the nut back up,now if you dont have this i would say get a cable and strap to a good eath point on the car and put to the 3 wires.
Now the red you have on the harness needs to go to your blue auto attena wire comming from your headunit.
This all worked well for me and you cant really here the noise anymore.
Let me know if this works for you.