My stock radio (and its built in clock) have just stopped working, and my troubleshooting so far has been unsuccessful. I'd be very grateful for any advice.
Fuses are visually fine, and I've confirmed that by switching them around and found no change in the radio. I've also used a 12v test light to check for power, results below.
My biggest problem seems to be in knowing for certain which fuse panel receptacle corresponds to which printed label on the panel. If the labeling pattern is the same all the way across the panel, as I suspect it is, then I DO have 12v at the radio fuse slot. But I'm not absolutely convinced of that. Here's why:
There seems to be a discrepancy between fuse slots on one side of the fuse panel to the slots on the other side - that is, the hot terminal is the LOWER one on the left side (horn for example), while on the right, the only terminal where I found 12v is UPPER terminal. So if that's different left to right, maybe the labeling is different too? I doubt it, but I'm just not certain, and that makes all the difference in my troubleshooting.
So, what I really need to know is if anyone is SURE which slot corresponds to the label saying "Radio".
I tried to solve this by checking another fuse, I picked the horn for convenience. The horn works. When I pull the yellow 20a fuse to the RIGHT of the label, the horn does not work. OK, that was easy. Again, the hot side is is the lower terminal. Of the three fuse slots on the right side of the panel, only one of them has power supplied to it according to my test light.
I made a clear closeup photograph of the fuse panel, but don't yet see how to attach a file here so I'm out of luck on that.
What I found is that of the three fuse slots on the right side of the panel, only two are labeled, and the slot which is to the RIGHT of the label indicating "radio" (like the one for horn) is the one with 12v. Again, the test light showed the hot terminal to be the upper, unlike for the horn fuse slot. The other labeled slot is for "HT MIR", no power there according to my light. As far as I know this car is not equipped with heated mirrors.
Most likely the label scheme is consistent all the way across the panel, and thus the slot where I get 12v (the one to the RIGHT of the label "radio") is indeed for the radio. And if that's the case, my problem is somewhere between the fuse and the radio, possibly the radio itself. But if the labeling is also reversed as is the hot terminal, then my problem is lack of power at the radio fuse slot. You can see how fundamental this is for troubleshooting.
As far as I can tell there are no other electrical problems. So if I have power to the fuse, are there any other possible causes for the dead radio other than the unit itself? Bad ground I suppose is one, I'll check that next.
Thanks very much for any help!