no start after battery relocation

1. deano_123 Established Member Joined: Nov 2011 Newcastle Posts: 1698 Range Rover Sport

   #1 3rd October 2012, 17:05

   reloacted a race battery to behind the passenger seat. earthed off one of the rollcage bolts, positive extension wire bolted to the original positive terminal location
   
   battery has 12 volts, lights etc work, when i turn on the ignition there is a constant wirring/ buzzing from under the ECU (fuel pump location?) the engine management light constantly flashes and the mileage turns to 0
   
   any ideas? i have a cut off switch in the middle of the postive extension, perhaps i've wired this up the wrong way round but i cant see this making a difference?
   
   any ideas?
2. user_27068 Established Member Joined: Sep 2008 York Posts: 2254 Ibiza Bocanegra 1.4TSI DSG

   #2 3rd October 2012, 17:26

   dodgy earth mate. mine did this exact same thing when one if my gearbox earths was left off.
3. deano_123 Established Member Joined: Nov 2011 Newcastle Posts: 1698 Range Rover Sport

   #3 3rd October 2012, 17:31

   so the earth at the rollcage bolt is cack, just remembered i forget to file back the paint, ill give this a go and try another earth point
   
   cheers!
4. deano_123 Established Member Joined: Nov 2011 Newcastle Posts: 1698 Range Rover Sport

   #4 3rd October 2012, 20:00

   tried a few different earth positions - same result
   
   checked a few earth locations in the engine bay - same result
   
   checked fuses, relays - all good
   
   checked voltage throughout the positive cable - 12 volt
   
   any ideas anyone?
5. deano_123 Established Member Joined: Nov 2011 Newcastle Posts: 1698 Range Rover Sport

   #5 3rd October 2012, 20:27

   after further investigation it appears you need an earth between the gearbox and chassis, is this true? if so, some advice on where the points are as i cant remember when i took the thing apart
6. Gandi699 Saxperience Post Whore Joined: Apr 2011 Posts: 9100 Amazon green VTR 16v, Inferno RS clio 182

   #6 4th October 2012, 00:52

   Yes theres an earth that runs to the top of the gearbox. Depends on the gearbox casing used (top of the box secured with a bolt, or a pin with a nut) where it is but you'll see it
7. deano_123 Established Member Joined: Nov 2011 Newcastle Posts: 1698 Range Rover Sport

   #7 4th October 2012, 14:27

   sorted! cheers for the help