^+1 Best explanation I have seen for ages Rod.
Actually there are 3 ways you can test... Rod's ways will all work, and there is nothing wrong with those, or the feature designed to test something for instances JUST like this
Option #3. Use the 'Test On' function on that auxillary (select 'test on' as the function and 'high' or 'low' side as an option. But there could also be another thing at play here. If this is a plug in G4, it is very possible it may not be able to high side drive anything that the OEM set up didn't usually.
Jurgen Biggelaar got a reaction from Akane in engine fan setup for g4