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Discussion Starter #1 (Edited)
Hi all,

Been using these forums for years, and I’m back after some time - such a great resource.

I have a question. I bought a new Kenwood DDX9019DABs headunit as I wanted to have wireless CarPlay. I’d installed head units in previous Honda’s so I more or less knew what to do.

Everything was going fine, and I connected most things except the DABS aerial. I then plumbed the cables down behind the opening and under the centre console path, Bluetooth mic to drivers side footwell etc. It got dark so I left it for today to continue.

When I went to test it today, the head unit didn’t turn on. I checked connections and no luck. Checked continuity on the cables and all fine, except no power at the main wiring harness. Weird I thought, so I looked at the fuses and a chart I had to find under dash fuse 37 was blown (7.5A, it’s for MICU) and this eventually leads to the positive power wire on the Honda audio wiring harness. I replaced it, tested and fuse stayed good, but the head unit still not working. Again, no power at the main Honda audio wiring harness.

How could this be if the fuse is good? I don’t understand what else could be stopping power coming to it. I even took the original/stock head unit and connected it back, but it doesn’t work (proving no power at the harness). The only other two fuses are the No 2 50A under hood one and No 16 15A one, and the 50A goes to many more places also.

Any advice and thoughts welcome!


Thanks
Andrew

PS see part of the circuit diagram showing the purple wire which is the positive on the audio wiring harness.

 

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Do you have a multi-meter? If so, go around various fuses to test for power.
It make be the case that you have a cable break going to the radio.
 

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Discussion Starter #3
Yeh I do, I used it to check continuity through the aftermarket harness but will check all the fuses also.

It would have to be either a blown fuse or a broken wire right? I did actually cut two wires on the steering wheel control harness as they now go into the Kenwood remote control jack cabling, but that’s worked fine and I’ve tested it several times before this issue.
 

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Discussion Starter #5
Yeh makes sense. The only issue is say in the Honda wiring harness, it’s difficult to truly check continuity on some cables as there’s no exposed terminals to pick up/press against with the leads of a multimeter Vehicle speed pulse/VSP blue wire for example...
 
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