Gauge Cluster does not turn on!?

Mitco39

Here I marked up a copy of page 42. I am leaning towards either the relay (hopefully) or the BCM being dead. I will test the BCM first to ensure that it is sending power to the JB fuse block, again not sure how even directly shorting out fuse 4 to ground would have any effect on the BCM, you would blow fuse G, which I am going to recheck tonight. . Fingers crossed.

What really doesn't make sense to me is the green highlighted route, seems sort of dangerous you short out any of the components being supplied by 3 and you are now drawing power directly from the BCM.

Attached Images

Wiring.jpg (174.5 KB, 24 views)

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SouthArk370Z

The green line: power comes from fuse #3 to the Defogger Relay coil. The BCM sinks to ground in this case. The BCM is not supplying power to the defogger coil.
The Ignition and Blower coils are powered from the BCM, but the Defogger coil is wired "bassackwards" and grounded through the BCM.

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Mitco39

So if that is the case that has to mean I have power at Fuse 3, which means I have power at the relay and its working correctly. Its all going back to fuse 4, but I know for a fact I swapped in atleast 3 different spare fuses. I am going to check the continuity between each of the fuse posts and the terminals. Its looking like something had to have let go inside of the panel itself, or I am a dumbass and fuse 4 is good (or I have a ground on the circuit and it pops it as soon as I turn on the key). Which I know is not the case as I tried fuse 4 in different locations to make sure it was working.

Its a head scratcher...

__________________
2007 Chevy Duramax - EFILive Tuned By Me
2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me
The Mrs. Ride -2012 335XI N55 BMW - Cobb Tuned By Me, Built by her
My Build --> http://www.the370z.com/members-370z-...39s-build.html

SouthArk370Z

Yep. I'm just glad it's happening to you and not me. :P

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Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma