Outer Limits 4x4 Board

Haven't been around since xmas time, good to be back.

Little Vitara ran well over Xmas covering 1/2 the south island, but on arriving home it developed a strange plastic like clicking noise. It sounds a bit like the fan hitting the outer surround on the radiator, but wait, theres a trick. Sound is very noticable when the lights are on, turn lights off and it either almost disappears or does disappear, I'm not sure if my imagination still hears something once lights are off. I think the same sound may appear when the heater fan is turned on, but I'm not sure.

Thanks for all replies

does it have airconditiong? is the noise there when both the fan and the ac are on?

Has air con. I was using the air con a few days ago, it does make a noise but nothing like this plastic hitting something sound. The sound I thought I could hear when I turn the fan on was only with heater on, not air con.