How do i identify which relay belongs to the fuel pump? 1989 Buick electra/park avenue?

I am trying to replace my intake manifold gasket, I seem to have gotten the basics on that, i am having problems locating my fuel pump relay to i can relieve the system first. i only have (as far as i know) to places for fuses- the one on driver side inside the car my headlight switch and the one close to firewall... show more I am trying to replace my intake manifold gasket, I seem to have gotten the basics on that, i am having problems locating my fuel pump relay to i can relieve the system first. i only have (as far as i know) to places for fuses- the one on driver side inside the car my headlight switch and the one close to firewall under the hood. there are 3 relay type boxes, i red one--battery two black ones---??? can i disconnect both
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