Well I was messing around with a radio install and I believe that I might have reversed the polarity when tapping into the yellow (+12v continuous) and blacck (ground) wires coming from the radio harness. I blew out a fuse that conrolled the lighting on the guages and I thought the radio. I replaced the fuse and I have my gauge lighting back but still no power from the battery or ground.

So right now it appears everything else works correctly but I do not have ground or continuous 12 volt (black and yellow wires from radio harness). I do get accessory power (red).

Any ideas? I suppose I can run a new wire from the battery but is there something easier that I might have overlooked? Is there potentially anything else affected?

Thanks!

 

Yikes!

You measured ground using an ohm meter and aren't reading ground?

Or

Did you measure between the yellow and black wires with a volt meter and aren't reading a positive 12 volts?

Or

Both?

I'd be willing to bet number 2 - that the ground wire is still functional and you've lost +12 VDC. It's very rare that you'd blow two fuses in series with each other - like I've never heard it done before - but I suppose that it is possible.

The J/B Fuse box (next to the driver's left foot) 15 amp fuse number 6 provides ignition controlled accessory power and on a blue with green stripe wire doesn't feed the triple gauge (red w/white) according to the schematic on page PG 4 of the service manual. It looks like they're fed from 10 amp fuse 19.

Both fuses 17 and 19's circuits are fed from a sub-master 60 amp circuit breaker D.

Battery power is fed from 15 amp fuse 37 located in the fusible link box (under the hood in front of the battery) on a yellow wire. It feeds "DI Clock, AV Audio, and AV Navi" circuits per the manual and not the "DI 3Meter".

Ground is a pain ... I don't want to go there unless I have to! Get back to me in the thread if you have a good fuse 37.

(all colors are Nissan factory Bose colors)