Engine alternator
When the alternator on your 1997 Ford Aerostar goes out, the first thing you'll notice is a dimming or shutting down of the auxiliary electrical components. Maybe the radio goes out, or the lights start to dim. Eventually, the minivan will stop functioning, leaving you stuck wherever you are. Replacing the alternator isn't difficult to do, and can be done in about 15 to 30 minutes.
Instructions
1. Pop the hood and locate the belt tensioner on the engine. Use the 1/2-inch breaker bar to loosen the tensioner, then slide the serpentine belt off of the alternator pulley and release the tensioner.
2. Disconnect the negative, then the positive, terminal on the battery using an open-end wrench. Unbolt the connections on the back of the alternator using a wrench, as well as your hand, to unplug the wiring harness.
3. Unbolt the alternator from the alternator bracket using the 1/2-inch ratchet and socket. Set the replacement alternator into the bracket and tighten it in place using the ratchet.
4. Reconnect the electrical connections on the back of the alternator using the wrench, and plug in the harness.
5. Use the breaker bar to pull the tensioner again, and work the belt around the alternator pulley and the tensioner, then release the breaker bar. Make sure the belt is aligned straight on the pulley and that it isn't twisted or kinked in any way. Reconnect the positive, then the negative, terminal on the battery using an open-end wrench.
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