[Trackpad_User]

I checked the fuses, and bench tested the radio - there's something wrong with the radio itself, and I don't know where to start to fix it. I can't seem to find any service manuals or anything like that, so I'm coming here in case anyone with any particular experience can help me fix this! Thank you!

I've put three radios in, 1 aftermarket that worked when removed, and broke when replaced, and 2 'factory' (one that once worked in the car, and a junkyard one. No screens on any of them

The part number of the radio is P04070438AE H. This is the unit. Any help would be appreciated, thanks!!!

 

[Trackpad_User]

How do I figure out/input this PIN?

I don't get any message to come up at all - it doesn't light up. The one I put in from the junkyard had orange lines lit up across it before they eventually died out... one at a time haha

The second one was the OEM one - I got it from the prior owner - that one didn't light up at all. How would I input the PIN?

 

[Trackpad_User]

I tested it on the bench with power to 1-4 and mute, as instructed on the top label of the radio.

The radios turned on - so far as I could tell, anyway, but they did not light up on the screen. Is it possible that my car is frying the radio screens somehow? The headlight backlight worked as intended.

I didn't see any orange filament lights. I used to on the junkyard one, but they died out after a while.

 

[Trackpad_User]

"The radio should march through ascending frequencies and find a station that plays. Try both AM and FM. Maybe the radio is good but the display has a bad connection and is not powering up so you can see the frequency and time?"

This is the exact problem - I can use the radios fine.

I had it ground to the body of the car, and then I grounded it from the back plate of the radio. Is there another ground pin to worry about? I was only ever grounding the amplifier on the bench - never anything else. Ditto with the car, it didn't have a braided ground attachment, and there isn't one in the truck - 1998 Dodge Durango w/ 6 speakers.

 

[Trackpad_User]

I hooked it up like shown in the picture, nothing. I'm not sure if I'm missing a ground somewhere - I'm thinking that maybe I have a bad ground in the car that I'm not testing on the bench that's causing my headaches.

 

[Trackpad_User]

Then it's a bad radio - unless I'm missing something somewhere, because that lights up, so far as I can tell turns on and tunes properly - just without a screen : /

Is there anything inside the radio that can be checked/fixed?

 

[Trackpad_User]

Yeah, I got a radio with a good display and moved some parts around to get it working. It was definitely the radio, not the truck.