ODI opened this investigation on August 18, 1999, based on four reports of fire involving the engine cooling fan.the reports allege the electronic cooling fan caught fire with resultant damage to the fan and wire harness and/or the harness connector.in its PE response, Ford provided information relevant to 46 additional alleged fire incidents and 47 alleged failures of the cooling fan involving thermal damage to the fan.this investigation has been upgraded to further study the issue.