D180 blowing 2 amp fuse

[alpinelakespilot20]

When running off the main buss, my D180 is blowing the 2amp fuse after being on for about 1 minute.  I have a charged internal battery that will keep everything running but I get the warning message that the unit is on backup power.  It only happens when the DB37 misc sensor connector is plugged in.  (When I only have the main power Dsub and the CHT/EGT Dsub connected the D180 will run off the main buss just fine.)

Any suggestions on where to start looking for the problem?  Thanks.

 

[jakej]

It only happens when the DB37 misc sensor connector is plugged in.

There is the clue - check to see that you don't have pin 1 & 2 connected to anything, if that doesn't 'fix' it then check any other 'power' (& ground) wiring.

Jake J

 

[alpinelakespilot20]

Thanks Jake.  Already, however, I had removed entirely the wires for pin 1 and 2 of the DB37 connector since the manual indicated "do not connect"  those two.  

By "check any other 'power' (& ground) wiring" do you mean on the DB37?  If so, which others would be "power" wires?  And what should I check for on the ground wires?

I have not yet hooked up my fuel flow power, oil pressure, ammeter, RPM, fuel level wires and a couple of the surplus black ground wires.  Would not having any of those connected cause any problems?

Thanks again for any help.

 

[jakej]

Which wires are connected on the DB37 ? to what ?

Jake J

 

[alpinelakespilot20]

Dynonsupport just answered on a different forum that the D180 now requires a 3A fuse, especially if also using the internal battery as the 2A would not both power the unit and recharge at the same time. I'll put in a 3A and see if that solves the problem.