MotorLes Posted October 19, 2016 Share Posted October 19, 2016 I have an Elddis Autoquest with what is probably a standard type of switch panel for selecting power to the rear cabiin. It's got a three way switch; Mid position off, up is Aux and down is Veh power. It's suddenly developed an issue in that the position for the veh battery does nothing. Switching to the Aux battery works fine and is accompanied by a click from a relay located in the unit with the fuses. Both batteries are charged and all fuses are ok. Any suggestions why the selector isn't working? Is there another relay that's packed up? Broken switch maybe? Link to comment Share on other sites More sharing options...
Colin Leake Posted October 19, 2016 Share Posted October 19, 2016 Mine makes the changes automatically keeping both batteries charged when hooked up to the mains. Off the mains it will switch to the vehicle battery if the habitation battery is getting low. I'm told it will never drain the vehicle battery. All very handy I suppose as long as it goes on working properly. Link to comment Share on other sites More sharing options...
MotorLes Posted October 20, 2016 Author Share Posted October 20, 2016 Colin Leake - 2016-10-19 7:08 PM Mine makes the changes automatically keeping both batteries charged when hooked up to the mains. Off the mains it will switch to the vehicle battery if the habitation battery is getting low. I'm told it will never drain the vehicle battery. All very handy I suppose as long as it goes on working properly. Hi Colin, My problem is not about charging. Both batteries are charged ok but I get no power in the rear from the vehicle battery if I select that position on the switch. Selecting the Aux battery works ok, with a corresponding relay click from the unit under the lounge seat. However, selecting 'veh', which up until now has put engine battery power to the rear, now does nothing. I can get away with just the Aux battey but it's nice (and intended) that the vehicle battery can be used if necessary. I just don't like things to not work as intended. Unfortunately the circuit schematic I have for the Autoquest is not helpful as it's pretty basic and doesn't for example show whats going on inside the switch panel itself and just shows it as a vague box with fewer wires coming out than the real thing. Maybe there's a better diagram about but I have yet to find it. Les Link to comment Share on other sites More sharing options...
RogerThat Posted October 20, 2016 Share Posted October 20, 2016 My first suggestion would be... did you start the engine with the switch in the 'veh' position? If so, you've blown the output fuse in the PMS unit (mine looks like a car battery charger). I speak from experience :D Link to comment Share on other sites More sharing options...
PJM Posted October 20, 2016 Share Posted October 20, 2016 I have an autoquest 155 and as far as i know the aux/veh switch is not used to isolate the power. It should be fully up or down depending on which battery is in use. Looking at the same poor schematic it looks as if a relay is used fed from aux fuse 2? I would check the relays, fuses and switch contacts. On my 155 the switch is accessible from the wardrobe. Link to comment Share on other sites More sharing options...
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