noting electrical work on my car and wont start

tried starting my car and its dead no clicking no lights radio or even hazard lights work, the only thing that happens is the battery and oil light come on in the dash i tried jumping it no good checked all the connections all good its like the hole car just shut down ,my temp gauge wasnt working so i tested it with a wire and earthed it off the earth from the battery to body bolt since then my car is dead any help please

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