text: Basic Ram 100 models were reintroduced for 1984, replacing the previous "Miser" trim level available on the Ram 150. A "Ram-Trac" shift-on-the-fly transfer case was added for the 1985 Power Rams, and both the crew cab and Utiline flared bed versions were discontinued for 1986, the latter not to return on any Chrysler-built pickup. In 1988, the slant-6 engine was replaced by a  fuel-injected V6 engine first introduced with the Dodge Dakota. The  engine, on which the 3.9 L V6 is based, also received electronic fuel injection in 1988. Because of the new computer-controlled fuel injection, ignition, and ABS system, more vehicle information needed to be displayed through any warning or notification lights; so inside the cab where a small compartment was once located on the dash, a new "message center" with four small rectangular light spots, contained the check engine light and other tell-tales including one for the parking brake and the ABS if the truck was so equipped. The message center later included "wait to start" and "water in fuel" lights on diesel models. Diagnostic fault codes were stored in the computer's memory, and cycling the ignition key three times allowed the computer to flash the trouble codes through the check-engine light for diagnosis of some problems. Rear ABS became standard equipment in 1989.
  The Ram 100 model designation was dropped and these models folded back into the 150 range for 1990, due to the introduction and sales success of the Dodge Dakota pickup. Additionally, the instrument cluster was slightly revised; the ammeter was replaced by a voltmeter while maintaining the 3-pod arrangement of the speedometer and gauges. Also for 1990, Dodge reintroduced the Club Cab, equipped with fold-out jump seats for the 1991–1993 models. Entry was made through the passenger or driver's doors because there were no rear doors for this configuration. For 1991, all versions received standard rear-wheel anti-lock brakes.
  These trucks, though popular with fleets, sold poorly compared to the Ford F-Series and the General Motors C/K trucks, with sales rarely breaking 100,000 units for most years of their production. Part of this was due to the dated cab and chassis design which had been in production since 1972, the lack of a powerful diesel option until 1989, and the lack of a big-block gasoline V8 option. Additionally, the interior had been given few updates since the October 1980 market launch.