Power on trouble and grief

[robreese]

I am doing initial power up of a Skyview installation in an RV-12.  With all cabling connected, and the master powered off, I can, as expected, get the Skyview running from the backup battery.  However, on turning the master switch on, the 5 Amp fuse for the EFIS immediately blows.  Disconnecting all cables from Skyview, and replacing the fuse, with the master power on, the fuse does not blow and I measure 12 V (nominal) on the 37-pin connector cable end, pins 1 and 20, with ground on pins 21 and 22, as expected from the wiring diagram.  Checking resistance, I see the pins 21 and 22 are grounded, as expected, and also Pin 4, which is described in the wiring diagram and in the Skyview Installation Manual as "Serial Port 1 TX", but shows it connected to Pin 10 of Van's Connnect-All box as "PWR/Extra Sens 1/ELT data".

In an attempt to eliminate any possible shorts in signal wires, I made an interposer cable with just the  12 volt (Pins 1 and 20) and ground (pins 21 and 22) connected, and the other (9-pin) connector also disconnected--such that the only wires connecting to Skyview were these two power and two ground lines.  Results: the same--fuse blow immediately on master power on.  I don't have an ammeter that can measure current draw in the short time that I have from power-on to fuse blow, and I am very reluctant to put a larger fuse into the system to further stess the system. 

Any words of enlightenment from anyone.  Just because I'm paranoid doesn't mean they're not out to get me.... :-X

Rob

 

[dynonsupport]

That sounds like the screen has a problem and needs to be repaired by us. Give us a call or send us an email and we'll get it fixed. It shouldn't ever draw 5A.

You didn't ever accidentally hook your battery up backwards, did you? That can cause a failure like this (and we'll still fix it for you, no worries).

 

[dynonsupport]

Just a follow-up on this one for anyone following along. Turns out one of the two male power pins on the SkyView D-37 connector was bent and was touching the connector rim (which is ground). So that would do it, and the fuse was popping appropriately to stop other things from going up in smoke.