(September 11, 2015) DETROIT -— Fiat Chrysler Automobiles is recalling about 1.73 million trucks for defects including a wiring harness that may short-circuit and set off an airbag. The largest recall covers 1.06 million trucks in the U.S. An investigation by the company has discovered that certain trucks may have steering-wheel wiring harnesses that wear because of contact with a spring, FCA said in a statement on Thursday.

Such wear may cause a short-circuit that may lead to inadvertent driver-side airbag deployment. The company said it was aware of two injuries due to wiring harnesses wear, but no accidents.

Affected are certain model-year 2012-2014 Ram 1500, 2500 and 3500 pickups and 3500, 4500 and 5500 Chassis Cabs. Additional vehicles numbering approximately 235,925 in Canada; 26,543 in Mexico and 23,635 outside the NAFTA region, also will be recalled.

FCA also said an additional 156,498 heavy-duty trucks were being recalled as they were supplied with steering components that may have welds with insufficient fusion. This may cause separation and lead to diminished steering response.

As well, about 188,000 vehicles are being recalled to make their side-curtain airbags compliant with a federal regulation to reduce the risk of rear occupant ejection during a rollover.

The company said it is also recalling 323,183 trucks in Canada, Mexico and outside North America to fix wiring harnesses and bracket welds.

Sources: FCA, Reuters