Had my Joying 8.8 working great, modifry harness and DCI, clean wire management and everything. Really amazed at all the features this unit has for a mere $400.

And then my battery died.

And then it died again.

Did a phantom draw test, was pretty easy to narrow down to the Joying unit. 500mA!! All on the yellow "battery power" cable. Turning off sleep mode did not help. Unplugging every other optional connector and USB did not help. I even wired up a relay to switch on only with the ignition, the unit didn't like it. Could not figure out a way to eliminate or even tone down the parasitic draw and now the thing is on my couch with a slashed up harness.

 

Ok I did some more thorough testing

Draw with the radio harness unplugged is ~12mA

Draw with radio harness plugged in shoots up to ~500mA for about 10-20 seconds, then shoots up to 700mA, then up to 1A for a few seconds, then down to 72mA for about 5 seconds, then back down to 12mA where it stays for several minutes

This initial draw, rise, and shrink over time happened every time I broke and completed the circuit (using ground post to disconnected ground terminal parasitic draw method)

I think this must be the head unit doing.. something (maybe restoring state from some internal storage?) and then activating sleep mode.

At this point I started considering this method might not be sufficient to test the battery's draw so I moved to the voltage-drop method. Similar results: connected negative terminal to negative post, ran around the car and dhalsim'd myself under the dash to test the radio fuses, the readings showed the same result: big spikes for the first 30 second or so, then settling at 0mv





Now I think my battery issues are alternator related so I'm gonna rebuild it. I guess I'm gonna order another harness from modifry since mine is all hacked up and has holes in it from testing with positaps.

Btw, I used these solder-seal shrink from amazon to do the harness originally, still have enough left over to do another one. These things are amazing, took me no time at all to wire up the whole thing and left me with clean and flexible splices.

 

Had a friend design this off of my measurements. Presses into the opening. Allows for easy removal of the screen.

 

Are you selling these pieces by any chance?

 

 

Any other pictures/angles of the 10.25"? Thanks

 

update. test fit in the car. looks so good ( installed without snap clips)

 

1) Will there be a tutorial?
2) What happened to the shifter?!

 

going to paddle shifting




short vid
https://streamable.com/s96v4a

 

*mindblown*