Keep the battery charged and the electrical system supplied with the TERREPOWER (formerly BBB Industries) N7791-SD Alternator, a new 12-volt, 180-amp unit with an internal regulator. It is a direct-fit replacement listed for many models from Ford and Lincoln, among them the 1997-2003 Ford F-150, the 1997-1999 Ford F-250 and the 1997-2001 Ford Expedition with the V8-4.6L or V8-5.4L engine. See the Buyer's Guide tab for the full list of applications.
TERREPOWER describes this as a premium-quality new alternator designed with dependability and reliability in mind. It is part of the 3G alternator family, and the listed applications use one alternator each.
The alternator is driven by the engine belt and generates the current that recharges the battery and powers the vehicle's electrical loads while the engine runs. Signs that an alternator may need replacing include a battery or charge warning light, dim or flickering lights, and a battery that repeatedly runs down. Test the charging system before replacing, since a weak battery or wiring fault can cause similar symptoms.
Country of origin: China.
Is this the right alternator for my 1997-2003 Ford F-150 with the 4.6L or 5.4L engine?
It is listed for the 1997-2003 Ford F-150 with the V8-4.6L or V8-5.4L engine. Check the Buyer's Guide tab to confirm your exact application.
Does it fit as an alternator for the 1997-1999 Ford F-250 with the 4.6L or 5.4L engine?
Yes, it is listed for the 1997-1999 Ford F-250 and the 1997-2001 Ford Expedition with the V8-4.6L or V8-5.4L engine. The other listed models are in the Buyer's Guide tab.
What are the output specs of the N7791-SD?
It is a 12-volt DC, 180-amp, negative-ground alternator with an internal regulator, air cooling and an internal fan, and it turns clockwise (right).
Does the alternator come with a pulley?
Yes. A conventional 8-groove serpentine pulley with a 64 mm (2-1/2 in) outside diameter is included. It is not a decoupled or clutch pulley.
What should I check before installing it?
Disconnect the negative battery cable first, and confirm that the pulley and the plug clock position 10 match your original unit. Follow the vehicle service information for belt routing and tension.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
