Radio or what is blowing a fuse?

[RIboater2]

A few weeks ago my radio and monitor went out. The fuse was fine. Disconnecting the battery for a rest seemed to have fixed it. last night sitting with car running I heard a pop and again radio and monitor went out. This time it is a blow fuse. Attempting to put in a new one instantly pops. I do still have time/date etc. on the gauge cluster, which I know comes from the MK3, so it's not that, but I thought the MK3 also ran the monitor? The monitor should still be on but no radio.
I haven't done any wiring or changed anything. Is it the radio itself? or maybe the amp? Having no monitor, that isn't even powered by the radio, is throwing me off of where to start looking.

[RIboater2]

I disconnected everything in the trunk. radio, amp, mk3, even the cd player. still blows a fuse so i know it's none of those components. Was just sitting in a parking lot with engine running when it blew. so strange....

[Mayorchuck]

Ebox fuse or trunk fuse?

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Did you check your charge ports/cig lighters?

[RIboater2]

trunk.

check them for? power?

[Mayorchuck]

I think the rear port is on that same fuse, if not both. Make sure nothing is in them that should not be.

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I'm not familiar with it but checking the WDS, it shows a Unloader relay, term R on that fuse as well on your car. Also show just the rear power socket on that fuse.

K3, X57


in front LH side of luggage compartment

K3	Unloader relay, terminal R
X57	Component connector (9-pin, black), Unloader relay, terminal R

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K3 Unloader relay, terminal R

Connector overview

Number	X-pin, color	Description
X57	9 -pin, Black	Connector Unloader relay, terminal R

Pin assignments at connector X57

Pin	Type	Description / Signal type	Connection / Measuring notes
1		Not used
2	A	Radio ON/antenna signal	Radio
3		Not used
4	M	Ground	Ground point
5		Not used
6	E	Terminal 30 voltage supply	Fuse F69
7		Not used
8	E	Voltage supply terminal R	Fuse F46
9		Not used

[RIboater2]

The console one is fine. the rear had a usb plug with no power so i took that out just in case and tried a known working one. dead. left it empty and tried another fuse and it blew. i'm out of fuses
i had to search what a relay unloader was lol. i don't think i'm having that kind of issue. everything else seems to work.

[Mayorchuck]

The relay and socket are the only things I see other than what you had already unplugged. The circuit wire is red/green to all the components.

[RIboater2]

even if i unplug the unloader relay it blows a fuse. I'm at a loss...

[Mayorchuck]

Just going to have to dig deeper. The only thing still 'connected' is the rear power socket. If it were mine, I would pull that trim off and unplug it at the connection. Maybe see if there is any corrosion on the back side of the socket. Other than that, your probably looking at a wiring issue. Any other odd issues going on? Any chance you have had water under the passenger seat?

[RIboater2]

I did reconnect all the other components. I will undo the rear socket.
Wasn't noticing anything else odd but Interesting you mention under the passenger seat. I have not had water, but did just two weeks ago replace the cat preheater control module. that took care of a code I've been battling a long time. Thinking maybe I disturbed something else under there?

[Mayorchuck]

That's just where many of the comb splices and grounds are located. One of the early signs of water corrosion in that cubby hole is the radio not working.

[Mayorchuck]

Saw your post on the other thread but wanted to reply here. I was checking the WDS, looking backwards from different radio component and found the antenna unit is supplied by Fuse 46. They call it a Diversity here.

I01113, X01130


in lower LH C-pillar

I01113	Diversity
X01130	Component connector (1-pin, blank), Diversity

I01113 Diversity

Connector overview

Number	X-pin, color	Description
X380	1-pin, black	Connector Diversity
X424	1-pin, black	Connector Diversity
X01111	1-pin	Connector Diversity
X01117	1-pin	Connector Diversity
X01130	1-pin	Connector Diversity

Pin assignments at connector X380

Pin	Type	Description / Signal type	Connection / Measuring notes
1	M	Terminal 31	Ground point

Pin assignments at connector X424

Pin	Type	Description / Signal type	Connection / Measuring notes
1	E	Voltage supply terminal R	Fuse F46

Pin assignments at connector X01111

Pin	Type	Description / Signal type	Connection / Measuring notes
1	A	Antenna signal	Antenna amplifier

Pin assignments at connector X01117

Pin	Type	Description / Signal type	Connection / Measuring notes
1	E	Antenna signal	Radio With on-board monitor On-board monitor

Pin assignments at connector X01130

Pin	Type	Description / Signal type	Connection / Measuring notes
1	A	Antenna signal	Radio clock receiver

Something called Voice input for the telephone.

U422, X10390


in rear LH side of luggage compartment

U422	Voice input
X10390	Component connector (26-pin, blue), Voice input

Telephone module.

H38, X18500


in LH side of luggage compartment

H38	Transceiver
X18500	Component connector (25-pin, Black), Transceiver

Phone related interface.

I01040, X01048


center console

I01040	Interface
X01048	Component connector (12-pin, Black), Interface

Sorry I missed these before. There are just so many variables when it comes to the radio/DSP/NAV in these cars. I assume you also pulled all of the radio components out of the dash to unplug along with the trunk.

[RIboater2]

I saw the diversity antenna listed in the TIS but that's on fuse 46 5A but tried disconnected it anyway and fuse still pops.Many items are on 46. #69 is a 30A fuse I'm chasing down.
I had a BT module and voice control but that's been pulled out a couple of years when it stopped working.

I haven't undone anything in the dash. The screen went out but the buttons on each side of the screen for radio stations and such still light up at night so wasn't suspect.
However, now going by the just the list of fuses and equipment, #69 does power the radio, cd changer, navigation and.... the onboard monitor. So it looks like i'll be pulling the widescreen out to disconnect it and see what happens.

[Mayorchuck]

Sorry, I was thinking you were after a F46 issue but yes, both are tied into the dash components.

[RIboater2]

It's ok Mayor. I appreciate your input and "thinking out loud" with me. So I pulled out the wide screen and still blowing fuses. I'm out of fuses again. Everything listed as being tied to #69 has been disconnected and fuse tried. So we have a short somewhere. Wondering about the wires and buttons in the steering wheel for changing stations and volume.

[Mayorchuck]

Best wiring guy I know on this car is Paul (psjr). If this were mine, I would send him a note. He would probably know a splice point for that circuit. Time to get a multi meter involved.

[RIboater2]

Mayor, wanted to get back to you on this. I was under the console to pull out my air bag module and thought, even though there's nothing in the rear power port, i'm going to disconnect the thing. And would you believe that was the problem all along? One of your first guesses. It doesn't look bad and it was empty so it wasn't suspect. I'm thinking there's a pinched wire somewhere down the line. I"m just leaving it unplugged and call it a day.
As always thanks for your help.

[Mayorchuck]

Glad to hear it. I bet your radio never sounded so good afterwards.

[RIboater2]

It sounds amazing! especially after I connected the diversity antenna I had left undone lol.
but.... now my interior dash and night illumination lights are staying on in the cabin even after the car goes to sleep. Pulled the battery and will check again later.
I had pulled the air bag module out so thought that was some kind of safety warning but plugged it back in and lights stayed on. I can't win...