Radio Parasitic Draw

L

LupWaffe Racing

New member
Hi all, new member here.

I've had my 08 3.0si roadster for a little over a year now. I've had a parasitic draw since i bought the car but recently it has gotten worse. Won't make it though a weekend without being driven. I spent the evening pulling fuses to find the draw and i have narrowed it down to the 30A Main Radio Head Unit Feed. Now the question becomes what is keeping the radio on and drawing current. I've looked at the Radio wiring diagram but can't seem to decipher what is the "enable" signal to the Head Unit. I also encountered a couple other oddities. I had a handful of other fuses that when pulled would drop the parasitic to nothing but after a few seconds the parasitic would return. These were the following: Mirror Adjuster, OBD2, Immobilizer/Interior Lights, F23 Lighting Circuits, OBD2/Instrument Cluster, Fold in Mirrors, Central Locking/Thiefproofing, and the Horn.

It kinda feels like there is something staying awake on CAN or OBD that is keeping the radio alive and alert. I should mention that non of the display is lit up. Also i can't tell if its normal for the radio to shut off with key off or with key off and door open?

Any advice or diagrams would be much appreciated!

Thanks,
Max
 
I've been fiddling around with the radio and its pinouts lately but I've not come across an Enable pin. Which connector is it on?

I can't promise any help, but is this a Nav system or standard? And is it one of the amplified 10 speaker setups?

If you've got the CD changer fitted I'd start by disconnecting that. If there's an amp by the battery you could try disconnecting that. I've never been aware of anything that would wake the radio up externally so I'd be almost tempted to say that it's a faulty headunit. It gets permanent power so it can be turned on with the button at any time but that's it really.
 
It's the standard head unit with no Amp. I'm leaning to agree that the head unit may be bad as there is no external indication that the unit stays on but it still draws current.
 
Possibly the amp chip has gone funny. There's several people on here that break E85s so someone will have a replacement they'll sell you.
 
Pull the radio out of the dash and unplug it just to make sure there is nothing else on the circuit that is drawing power.
 
BumpyZ4 said:
Pull the radio out of the dash and unplug it just to make sure there is nothing else on the circuit that is drawing power.
Click to expand...

Good call. Didn't even think it could be something else not listed on that feed.
 
You must log in or register to reply here.
Back
Top Bottom