cantfindausername
New Member
Hi all,
I've somehow (stupidly) managed to fry 2 (yes 2!!!) head units when fitting them in my car.
I'd done a bit of re-wiring and thought I understood what was going to happen, but I got some very unexpected results.
I was fitting a new 12 way power distribution block to give me 6 feeds on a constant feed from the battery, and 6 feeds on an ignition controlled relay (IGN powered supplies). The distribution block has a shared earth which I'd ran directly back to the battery -ve.
The car also has an Isolation switch fitted in the cabin which cuts the main battery/chassis earth cable.
I figured I'd run 1 Ign. and 1 Const. to the head unit along with an earth feed. This in my eyes would give a constant power for the internal battery of the head unit, and also the switched power of the Ign circuit.
When I started to install the head unit though the case started to spark whenever it touched anthing attached to the chassis, even though the Isolation switch was off. It seemed like the case of the headunit case becoming postively charged.
As such I've got 2 dead head units that I'm really cheesed off about.
I'd like to have a go at fixing them if possible but I don't have a clue where to start.
I'm also really confused as to what has happened here. If I could get the head units working I'd happily just run them off the Ign and deal with having no memory as this is how it used to be.
I just wants music back in my car - I really hope someone can offer me some assistance!
Many thanks in advance,
Anthony
I've somehow (stupidly) managed to fry 2 (yes 2!!!) head units when fitting them in my car.
I'd done a bit of re-wiring and thought I understood what was going to happen, but I got some very unexpected results.
I was fitting a new 12 way power distribution block to give me 6 feeds on a constant feed from the battery, and 6 feeds on an ignition controlled relay (IGN powered supplies). The distribution block has a shared earth which I'd ran directly back to the battery -ve.
The car also has an Isolation switch fitted in the cabin which cuts the main battery/chassis earth cable.
I figured I'd run 1 Ign. and 1 Const. to the head unit along with an earth feed. This in my eyes would give a constant power for the internal battery of the head unit, and also the switched power of the Ign circuit.
When I started to install the head unit though the case started to spark whenever it touched anthing attached to the chassis, even though the Isolation switch was off. It seemed like the case of the headunit case becoming postively charged.
As such I've got 2 dead head units that I'm really cheesed off about.
I'd like to have a go at fixing them if possible but I don't have a clue where to start.
I'm also really confused as to what has happened here. If I could get the head units working I'd happily just run them off the Ign and deal with having no memory as this is how it used to be.
I just wants music back in my car - I really hope someone can offer me some assistance!
Many thanks in advance,
Anthony