My dodge ram 1986 headlights,taillights, alternator and dash board stopped working. The heater is the only thing that works. Does anyone know anything about this problem and solutions to fix it???Please help

Here are a couple things to check. There should be a heavy wire coming off the positive battery cable at the battery post. Follow this wire down a few inches and it should have a connector, check that connector for a good connection. If this is ok then look for a connection box at the firewall,(drivers side) where a main harness of wires run through to inside. Check that bunch of wires, one way of doing this is to wiggle the wires firmly while someone else is watching for the headlights to come on. That is called a wiggle test, so a person can start wiggling wires for the bad connection to show up. You may have to go to inside fire wall by steering column and wiggle there. On some chrysler products the amp meter gives problems.