We have a 2006 Jayco Destiny, and last night all of the 12volt went out. We managed to get the power outlets working but we have no lights, heater, lav flush, etc. The 240 volt is working normall. All of the fuses are OK, even changed a couple to make sure. Does any one have any ideas, bearing in mind that I have the electrical aptitude of a very dumb cat.
Most probably fitted with Red Arc Solenoid on system - they require in excess of 12 V to actuate - It is supposed to "protect" battery from drainage and also used with isolation switch when travelling..
Try bridging the active and negative on the solenoid if system starts to work you have isolated the problem - now the hard part is proving to manufacturer you have a faulty unit fitted.
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If your caravan is typical of a standard Jayco build and has the same power supply / battery charger as fitted to other Jayco caravan's the fuse pannel will have a master fuse ( 30 Amp I think ) and could be blown, Or the master swich has been acidently turned off ( in our pop top the power supply lives under the fridge and the master switch is right be side the unit, OR my bet would be that the house battery has become died and the terminal voltage is too low and the power supply/ charger has disconnected the battery, hence no 12 Volts. This is to save the battery from becoming overly discharged.
Pluging into 240 volt power would bring the power back and start to charge the house battery. One other thing to check would be to see if there is a master fuse at the house battery as well, jayco may not have fitted one, but a previous owner may have fitted one. When you have sorted out the problem IF there is no fuse close to the battery have one fitted as this would be the last line of defence if there is is a major problem later with the 12 Volts. Remember a 12 Volt 100 Amp deep cycle battery can provide 100's of Amps short term and can melt insulation and start fires.
The above chould happen also if the power plug for the power supply/ battery charger has some how be come unpluged from the power point and not charging the house battery.
-- Edited by valiant81 on Sunday 7th of June 2015 02:39:04 PM
We had the same problem with our Jayco Swan once. Turned out to be a fault with an earth wire in the ceiling.
If the lower lights work - the one outside and in the boot - it may be the same fault. A temporary fix was to buy some figure eight speaker wire (Dick Smith) and tape the wires to the ceiling with duct tape. Make sure you get the polarity right if your lights are LED.
In the interim we used a 240V trouble light hanging from the skylight handle for lighting.
Go to your battery and check the leads on the battery itself are tight. Some times the small amount of corrosion around the terminals will create poor contactivity, and up the same leads as well that you can not see. If you have a Voltage metre check the battery. With the cold weather now, It may have died when one cell drops out, you will kill the battery.
I have done similar things!!!!! :)
