Alternator in Indiana

The connections corrode before the machine does

Damp air works on the exposed side of an alternator: the terminal stud, the plug on the regulator, and the earth strap between engine and body. A resistance in any of those looks exactly like a failing alternator on a meter at the battery, and is a fraction of the price to fix.

Check the charging voltage at the alternator's own output and then at the battery. A meaningful difference between the two is a connection, not a machine.

The climate, in a number

Indianapolis has a normal annual snowfall of 25.5 inches on the 1991 to 2020 record. Every one of those days is a day the cooling fan, the air conditioning clutch and the blower are all drawing at once, and the alternator is what carries them.

What goes on the roads in winter

Rock salt and salt brine are both used: one rare statewide storm in February 2022 took 89,000 tons of salt and 274,000 gallons of brine. What is spread on the road reaches the alternator through the same wheel-arch opening that cools it, and a case packed with salted grit runs hotter than one that is clean.

Salt, and no inspection

Winter salting is heavy, heavier still in the north where lake-effect snow off Michigan reaches across the state line.

And Indiana has no periodic safety inspection and no general emissions testing. Nothing checks brakes, suspension, steering, tyres or lights on any schedule.

What else Indiana does to a car

Salt across the whole corridor network, which is most of the driving.

The highest interstate density in the country and freight-corridor hours — parts here age by running hours rather than by odometer miles.

What we hold, and what it costs

5 options from Bosch, Cardone, Denso, Remy and Valeo, from $239.99 to $309.99. Prices are firm — where we have no price we publish none.

We are a reseller rather than a manufacturer: we source the part, check it over and sell it, and we confirm it against your year, make, model and engine before it ships rather than asserting a fit on the page. We ship anywhere in Indiana, including Indianapolis, Fort Wayne, Evansville and South Bend.