Someone answering this question properly deserves a prize!
Bought a 2002 Discovery 2 yesterday, previous owner had converted it from air to coil springs at the rear and simply removed the fuse appropriate to the air suspension rather than having the ECU reprogrammed to 'spring'. Drives absolutely fine, brought it home yesterday and I am slowly going over it checking it out.
Absolutely no strange noises when I checked it over before buying, or when I got it home yesterday until this morning.
I walked past it and I could hear a tick-tock noise like a relay operating, tracked it down to the housing that holds the air suspension compressor which the previous owner left in but as mentioned removed fuse. As I opened the passenger door tick-tock noise went, closed it started again - I'm assuming this might be because all circuits to the height adjustment are disconnected if there is a door open??
What I couldn't work out is why the car wasn't making that noise yesterday, then I thought about the trickle charger I had on the battery – removed that and the tick-tock noise went.
What I'm really confused about is how could any electric circuit be making its way to the compressor area when the fuse for that circuit is been removed – does it pick up electricity from other auxiliary circuits and why would it only be making a noise with a trickle charger connected to the battery?
Total mystery but indicates to me I need to perhaps remove further electrical connections so that the redundant air suspension circuits don't inadvertently cause battery drain,
any ideas?
Bought a 2002 Discovery 2 yesterday, previous owner had converted it from air to coil springs at the rear and simply removed the fuse appropriate to the air suspension rather than having the ECU reprogrammed to 'spring'. Drives absolutely fine, brought it home yesterday and I am slowly going over it checking it out.
Absolutely no strange noises when I checked it over before buying, or when I got it home yesterday until this morning.
I walked past it and I could hear a tick-tock noise like a relay operating, tracked it down to the housing that holds the air suspension compressor which the previous owner left in but as mentioned removed fuse. As I opened the passenger door tick-tock noise went, closed it started again - I'm assuming this might be because all circuits to the height adjustment are disconnected if there is a door open??
What I couldn't work out is why the car wasn't making that noise yesterday, then I thought about the trickle charger I had on the battery – removed that and the tick-tock noise went.
What I'm really confused about is how could any electric circuit be making its way to the compressor area when the fuse for that circuit is been removed – does it pick up electricity from other auxiliary circuits and why would it only be making a noise with a trickle charger connected to the battery?
Total mystery but indicates to me I need to perhaps remove further electrical connections so that the redundant air suspension circuits don't inadvertently cause battery drain,
any ideas?
. put the air suspension back in and all will be fine
