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Old 09-18-2020, 06:53 PM   #11
Deerhurst
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I'm going through the unit as I type this up. There will be multiple edits as I go.



With the antenna disconnected and no ground it still turns on but still only when the illumination circuit is enabled.




Edits:


Constant power and illumination are as expected at the truck harness.


Switched power appears to be dead. Time to figure out where that comes from.




I have voltage differential between the pins the fuse plugs into at the fuse block. Fuse is good per my meter. I have contanuity from fuse block to the connector at the stereo.



I hoping bad contanuity with the fuse in the fuse block.




FIXED! Fuse was not making good contact in the fuse block. Bend the tab back in and we are in business!
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Last edited by Deerhurst; 09-18-2020 at 07:21 PM.
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Old 09-18-2020, 07:18 PM   #12
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Possibly something happened to the switched power causing it to turn into a ground, try disconnecting it ( if you haven't already) and see if the radio goes dead


Does the illumination wire have power with the lights off?


I would connect a proper ground and connect the constant and switched power, disconnect the illumination wire for now and see if the radio acts normal


On an older Nissan, ( I think it was my sentra), I was having power problems to the radio and I ran new constant and switched wires directly from the fuse box, that fixed the problem I was having at the time, I probably used fuse tap connectors.
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Old 09-18-2020, 07:49 PM   #13
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I must have edited my post after you posted and I didn't refresh the page.



Switched power was not at the stereo plug.



Illumination worked as expected. No power until the light knob was spun.



Fuse tab in the fuse block was loose causing ignition power to not be present. Bent the tab out a little and good to go!



The ground thing is still a mystery. It's connected but the head unit functions as it should without.
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Old 09-18-2020, 08:07 PM   #14
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Are you using an amplifier? If so it may be grounding through the RCA cables
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Old 09-18-2020, 08:29 PM   #15
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I have a powered sub with RCAs. Hopefully soon a real sub and a real amp for the doors.
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Old 09-18-2020, 10:03 PM   #16
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That may be providing the ground, would be best to ground the headunit if it is not already.
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Old 09-18-2020, 10:22 PM   #17
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Quote:
Originally Posted by ahardb0dy View Post
That may be providing the ground, would be best to ground the headunit if it is not already.

It's grounded.


Unit worked without RCAs connected.
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Old 09-19-2020, 02:47 AM   #18
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weird
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Old 09-19-2020, 03:15 AM   #19
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Agreed. Might be getting ground through the speakers as it powered on without the antenna, amp or harness ground connected.
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