Combines 1680 tach fuse blowing

Does blow your fuse only when you shut the key off, if so try to pull the fuse out before shutting the key off, then put it in before you start it to see if its before you start it or if its after you shut it off. You might be getting a back feed in the system.

I think you're right - I had connected my agleader to a connector bank (as shown in the agleader installation),but I think I had it hooked up to a positive feed. The monitor only worked with the key off and my lightbar kept blowing fuses (praise G-D the folks at Trimble fused and diode protected the electronics). Everything is ok now - thanks, Pat