alright guys i promised this in a few other threads for a while now in other threads around the forum so i finally got the pics together.
Heres a quick run down on how to make your nice new expensive head unit from walking off on you. I got everything i needed at my closest ACE hardware store. they even crimped the clamps on the cable for me.
what you need:
1/8th-3/16th inch steel cable (you can get it laminated if you want to, i chose not to)
2 cable clamps to make the loops
solid steel mounting point behind the dash
hardware to mount in the dash if you dont already have a bolt to use
machine thread screw that fits in the back of the HU
so to start find your head unit, and pull it out of the dash. now for me i just pull the whole dash kit out, but you can use the stereo removal tools to pull ONLY the HU out if you want to. all these pics came out of my focus, which i painted the dash in, so i taped it off to be safe.
once you have the HU out, (I left all my connections hooked up because i did not want to lose my settings, unplug and remove the HU if needed) estimate the distance between the closest steel mounting point and the back of the HU, and make sure you give yourself plenty of room to bolt the cable to the rear of the HU.
so here is an example of how the steel cable will look
notice how small the loop is so you cant easily slip it passed the screw in either the dash or HU. i used a large washer for the HU to make it nearly impossible to remove. you will have this loop on both ends of the cable. and like i said after i had ACE hardware cut the cable they crimped the clamps on as well for free.
now find a spot on the steel dash to mount one end of the cable to. take your time because the harder it is for you to mount the thing, the harder it is for a thief to try to take it out. in my focus there is a bolt that is reverse from where your looking from that i chose to use.
now that its mounted to the dash its time to mount the other end of the cable to the HU. i have a higher end HU with an aluminum heat sink, but every other HU still has a mounting hole in the back of the deck. its almost dead center. for my heat-sink i chose to use a longer bolt then if it was a smaller heat-sink. for the mounting hardware i chose a allen/hex style bolt because i figured its less likely that a thief would carry a hex key with him to remove it. but if you want you can use a security style bolt that is much harder to remove. they also have multiple styles of security bolts at ACE.
Here is how its mounted on the deck.
once its all together and tightened down just install the HU how it was before and your good to go!
Now just to clarify im not saying this will keep your deck from getting jacked, but for the average rip and pull thief it should stop them.
hammer down on the questions/comments. ill respond as soon as i get a chance