Some Fiero electrical connectors become brittle with age. Replacements can be found through auto parts stores and the AC Delco web site (acdelco.com). A few connectors can be found in the blister packs in auto parts stores as shown below.
Radio '84-88 Conduct-Tite! 85176 A/C high pressure switch '84-88 Conduct-Tite! 85147 A/C low pressure switch '84-88 Conduct-Tite! 85148 A/C pressure switch '85-86 Conduct-Tite! 85146 Cooling Fan Relay '85-87 Conduct-Tite! 84593 IAC Valve '84-88 Conduct-Tite! 85112 TBI solenoid, 2.5L '87-88 Conduct-Tite! 85138 Ignition module harness, 2.8L '85 Conduct-Tite! 85135 Ignition switch repair kit, '84-86 Conduct-Tite! 84599 Washer Fluid Sensor '88 Conduct-Tite! 85190Sensing of the coolant level was not used on the Fiero but was apparently planned. This feature can be added per Oliver Scholz's web site: www.fieros.de/en/articles/lowcool.html
NOTE: It is our guess that the above '85 2.8L Ignition Module Harness will fit all Fiero 2.8L engines. Other cars which used the same ignition module harness are:
Buick Skylark '85 Chevy Citation '85 Chevy El Camino '85 Chevy Monte Carlo '85 Olds Firenza '85 Pontiac Parisienne '85