Switch power (red wire) dead

igbad · 07-13-2015, 01:25 PM

My Z is a base model and the head unit was replaced a couple years ago with a Pioneer avh-x2500bt.

When I did it originally, the wiring harness was a mess so I wanted to clean it up a bit and also restore the steering wheel controls.

Anyway, I was trying program the Axxess aswc-1 and during testing had the ground wire exposed.

I accidentally touched the ground wire to the head unit case and it shorted.

Now it doesn't turn back on, and when testing voltages the switched power, wire (RED) is not getting any power when ignition is on.

I checked all the fuses in the fusebox in the battery well and next to the front-right airbox. No fuse seems to be blown.

Head unit powers up ok when fed constant 12v power, so it's not a problem with the head unit.

Any insight would be awesome, thanks!

370z_Roadster · 07-13-2015, 02:58 PM

You need to locate the fuse for the 12V constant power for the radio and confirm one side is hot. If not, you may have blown a fusible link.

igbad · 07-13-2015, 03:41 PM

Quote:

Originally Posted by 370z_Roadster

You need to locate the fuse for the 12V constant power for the radio and confirm one side is hot. If not, you may have blown a fusible link.

i see...would that fuse be in the fusebox inside the battery well?

370z_Roadster · 07-14-2015, 01:41 PM

Quote:

Originally Posted by igbad

i see...would that fuse be in the fusebox inside the battery well?

No, it's in the footwell on the Driver's side. 15A fuse listed as audio. Check both sides of the fuse for 12V with the ignition on(accessory) and use the contact point on top of the fuse. If 12V on one side only, bad fuse. If 12v on both sides, you have an issue between the fusebox and the radio. You could run a new power wire....

DeliriousClam · 07-15-2015, 07:35 PM

Another way of doing it would be finding the accessory wire going to the push to start button, splicing a wire into that, and connecting that wire to the red wire on the headunit.

EDIT: Kinda goes along with what 370z_Roadster was saying.

igbad · 07-17-2015, 04:25 PM

Quote:

Originally Posted by 370z_Roadster

No, it's in the footwell on the Driver's side. 15A fuse listed as audio. Check both sides of the fuse for 12V with the ignition on(accessory) and use the contact point on top of the fuse. If 12V on one side only, bad fuse. If 12v on both sides, you have an issue between the fusebox and the radio. You could run a new power wire....

awesome, thanks for the tip.

yea i was considering running a new switched power wire but that was going to be last resort.

will look into this tonight, thanks!

07-13-2015, 01:25 PM	#1 (permalink)
igbad Base Member Join Date: Jun 2013 Location: SoCal Posts: 49 Drives: '12 370Z Base GM 6MT Rep Power: 11	Switch power (red wire) dead My Z is a base model and the head unit was replaced a couple years ago with a Pioneer avh-x2500bt. When I did it originally, the wiring harness was a mess so I wanted to clean it up a bit and also restore the steering wheel controls. Anyway, I was trying program the Axxess aswc-1 and during testing had the ground wire exposed. I accidentally touched the ground wire to the head unit case and it shorted. Now it doesn't turn back on, and when testing voltages the switched power, wire (RED) is not getting any power when ignition is on. I checked all the fuses in the fusebox in the battery well and next to the front-right airbox. No fuse seems to be blown. Head unit powers up ok when fed constant 12v power, so it's not a problem with the head unit. Any insight would be awesome, thanks! Last edited by igbad; 07-13-2015 at 01:31 PM.

07-13-2015, 02:58 PM	#2 (permalink)
370z_Roadster Base Member Join Date: Jul 2014 Location: Port Saint Lucie, FL Posts: 66 Drives: 11 370z Roadster 7AT Rep Power: 10	You need to locate the fuse for the 12V constant power for the radio and confirm one side is hot. If not, you may have blown a fusible link. __________________ 2011 Nissan 370z Roadster 7AT Brilliant Silver 2014 Silverado CC 4x4 LTZ Diamond White TriCoat

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07-15-2015, 07:35 PM	#5 (permalink)
DeliriousClam A True Z Fanatic Join Date: May 2015 Location: NJ Age: 30 Posts: 3,758 Drives: 12 Base Sport Rep Power: 54271	Another way of doing it would be finding the accessory wire going to the push to start button, splicing a wire into that, and connecting that wire to the red wire on the headunit. EDIT: Kinda goes along with what 370z_Roadster was saying.