Join Date: Feb 2007
Nominated 16 Times in 67 Posts
TOTW/F/M Award(s): 28
Thanked 5,201 Times in 4,712 Posts
Hi Lancer - the power supply to the caravan system could be faulty whereby it wants to take all the charge from the alternator and the car gets none. My neighbour had a similar system whereby there is a dual charge relay which directs the charging current to either the car or van was faulty. If it were mine I would drive the car for a few miles without the caravan attached and see if the car starts OK. Additionally it may be worth getting the voltage output of the alternator checked.
P.S. Has your car got a dual charge relay system fitted
Currently in madnoel10's garage:
Honda Civic 1.4l