R32 wont start no 12v

[getrichster]

R32 wont start no 12v

Hi there, just got stuck taking the R32 gtst out. Battery was flat so tried to jump start it but after a few tries the whole car lost power not even the hazards or clock or alarm would not work. Power came on randmly twice but once tried to start it killed the power again. Tried changing the main fuse, checked all fuses, changed batteries still no luck. It has power to the fuse box in the engine bay. Any ideas? 

Edited February 15, 2017 by getrichster

[niZmO_Man]

The links at the positive terminal, checked/cleaned them?

[getrichster]

Nizmo_man yes did that and cleaned earthing points too. After hours of testing with a muiltmeter voltage inside the car to the back of the fuse box would slowly drop to 0v. Found out it was the earth cable from battery to ground was corroded inside the cable.