C34 Radio Static When Iginition Is On

[Mr GTS4]

Hay guys,

need some direction with tracking down where this static noise is coming from.

i just have the basic mp3/cd head unit with std front speakers, spilts in rear doors and sub + amp in boot.

. now the issue is with the RADIO only, CD's and aux input are fine. i had the original antenna connected which was terrible, then i tried a plugin non powered option.. again terrible. then i purchased one that connects to dimester circuit and 12v.

when the car is on accessories power the radio seems fine and very clear. as soon as the igition is turned on the static starts and reception is poo again. there is no engine/wine noise just static like you have really bad reception.

what should i be doing to fix. different ground for head unit? check 12v line ( for what i dont know )?

driving me insane!!

[PN-Mad]

Spark plugs.

Its old school I know, but was the first thing that came into my head. Can't remember which way around- need some of the old timers to tell us- but Plugs either with/without resistors create bad effects on radio signals.

I believe its the "R" in the plugs name that designates it as a resistor plug.

shoot me down if I'm wrong.

[Mr GTS4]

Hmmm.. Investigating first thing tomorrow morning... Thanks

Edited June 20, 2012 by Mr GTS4

[Mr GTS4]

Would the spark plugs still interfere if the car isn't actually running? The station starts as soon as I turn the key to on, before actually starting it

[Springsteen]

Ignition or acc?? depends where your ignition is coming from, may have found an ignitiion wire with something active ie fuel pump, try using your power supply from an acc/ ign supply rather than an ign only wire.

[Mr GTS4]

both.. i tried both of them over the weekend and it gave the same result. i also noticed last night that when the headlights are on its worse again..

[KiwiRS4T]

The original aerial is in the side windows. I believe there are two connections that you need to make although I'm not good at wiring audio stuff.

[Mr GTS4]

ok radio fixed...

the plug that connects into the ariel wiring must be connected to 12v. i think its yellow with a black stripe. connects about 3 inchs back from the 2 prong plug and comes out with all the standard radio wiring. once i connected it to the accessories 12v every station was perfect