If you are thinking of an India-pakistan scenario(I can't think of any other place where such a confrontation would occur), it doesn't work out that simple. The IAF has very innovative tactics as well, where aircrafts fire their missiles under the guidance of another aircraft's radar, in the manner that @
Peter C mentioned in post number 10.
The MKIs would almost always be used in hunter-shooter pairs with smaller fighters. The immensely powerful radar of the MKI would feed information to smaller aircrafts like bisons and mirages currently, or LCAs and Rafales in future, and those smaller aircrafts would be flying far ahead in radar silent mode. Then those aircrafts will shoot missiles that are guided by the MKIs which stay behind, out of engagement range. That is why the MKIs are all considered by the IAF as mini-AEWACs.
Of course, not to mention the fact that the IAF will also have proper AEWAC coverage.
But yes, as a general answer to your question, AEWACs can guide missiles from fighters onto enemy fighters. In the PAF fleet, I think the Eyerie AEWACs can do that for F-16s, and the chinese AEWACs can do that for JF-17. The other fighters rely on some kind of complicated GCI.
As for the IAF, they plan to have every single fighter data linked and networked, able to share info with any other. As of now, the bisons, MKIs, mirages and mig-29s are all networked. In future, with the induction of LCA and Rafale, and the phasing out of older jets, the IAF as such will be a fully network centric force, with data transmitted not only between airborne assets, but also with ground radars, aerostats and the ground based air defence network.