So basically whats happening, I went to wire up my elec aerial to replace my current manual one. Hooked up the remote wire to the headunit, and decided to just connect the power lead from the aerial up to the power lead for my HU (As I figured the aerial wouldnt draw that much current, so it shouldnt affect the HU).
The aerial worked for around 20 mins (Had trouble with the aerial, forgot to put the nut on top so the aerial mast thing fell out when it turned on, so spend a while trying to feed the rope back in).
I then went to turn the car on, the HU wont come on. Disconnected the aerial power lead from the HU one to see if that was the problem and still no power. Got a multimeter on it and still no power.....

I have checked all of the fuses inside and outside (Engine bay) of the car and all of them are fine... but still no power to the HU. The fuse on the HU is also fine.....

What could be wrong??

Is the ground for the HU ok? Fuse still could be blown even if it appears ok if you are testing with a multimeter and getting no reading. I would replace it anyway.

Is the ground for the HU ok? Fuse still could be blown even if it appears ok if you are testing with a multimeter and getting no reading. I would replace it anyway.

If hes getting no reading on a multimeter but the fuse still looks good its got a hairline fracture which is doubtful, only seen it a few times where fuses have been shaking to high hell on bolted to truck motors.

have you checked the one in the footwell? and the one in the back of the headunit itself? double check all your connections on the headunit especially if you have used crimps

Is the ground for the HU ok? Fuse still could be blown even if it appears ok if you are testing with a multimeter and getting no reading. I would replace it anyway.

Well im testing with a multimeter using the orange power cable and the metal bracket where the HU sits in (I did this before I connected the aerial and it was reading 12v, now it reads 0.5 or something) So I dont think the ground is the problem.....

But Ill replace the fuses just to make sure!

Ive also noticed there are two small black boxes on the power lead (I opened one and it contained a resistor thing), but cant seem to get the other little box open (Maybe this contains a fuse that is dead?)

;1149412']If hes getting no reading on a multimeter but the fuse still looks good its got a hairline fracture which is doubtful, only seen it a few times where fuses have been shaking to high hell on bolted to truck motors.

have you checked the one in the footwell? and the one in the back of the headunit itself? double check all your connections on the headunit especially if you have used crimps

Yeap checked the ones in footwell, engine bay and headunit.. :(

Most of the connections are soldered, but ill double check the ones that arent! :)

Check the accessory relay too, you might've buggered it running the ANT power directly off the ACC circuit instead of through the Headunit's Antenna Control wire.

Check the accessory relay too, you might've buggered it running the ANT power directly off the ACC circuit instead of through the Headunit's Antenna Control wire.

Ahhh I forgot about the relays! cheers!

Where do I find the accessory relay?? Is it in the footwell fuse box? There are 3 relays there, but I have no idea which relays they are??

My ciggy lighter is still working, as well as everything else...

I also figured out that the wire I ran the aerial off was the constant 12V, not the acc wire... So im now thinking that the Acc fuse relay wouldnt be blown anyway...
rgggg

PROBLEM IS NOW FIXED!!!
Found a little fuse holder behind the HU which was completely covered in tape with all of the HU wires with it (Was really hard to get at as it couldnt reach out of the hole, so I had to stick my whole hand in the HU hole). It was a 10A fuse, which was blown, so HU is working now that I replaced it!

Had to do some rewiring again today, as when I had installed my aerial, it went up with the radio on, but never went down. I found that if I manually disconnected the remote wire it would wind down (Only with the radio on though).

Figured out that the 'Electic antenna' wire coming out of the HU was a turn on, not a power source (even though it happily powered the aerial..), so that is why the aerial never went down (Power was disconnected when radio was turned off, so the motor on the aerial wouldnt work).
So now I had soldered the remote turn on to the 'elec antenna' on the HU and the power for the aerial to the constant 12V for the HU. (Figured that if I wired it to the ACC, I would have to wait for the aerial to go down before I could take the keys from the ignition and I didnt really want that).

Do you think the aerial will draw power from the battery when the car is off now that its directly connected to the battery?? I dont want a flat battery tommorrow....

The antennar will only draw power when the motor is working (up and down)
Did you connect the correct wire from the h/u to the antenner?
Are you using the stock or aftermarket h/u?
Either one there will be a wire for an electric antennar

The antennar will only draw power when the motor is working (up and down)
Did you connect the correct wire from the h/u to the antenner?
Are you using the stock or aftermarket h/u?
Either one there will be a wire for an electric antennar

Ahh kk awesome.

Yeep everything is good now I thinks, the HU is an aftermarket and it came with the antenna wire, but as I figured out, this is just a remote turn on lead and not a power source...

Aerial now comes up when the radio is turned on and goes down when I change source or turn off the radio or car... So its all good! :D

All it is, is a signal wire
H/u will cut the signal when another source other then radio is selected