If its the interior fan[heater-a/c]unit the fan is against the firewall on the passenger side the dash control knob has a tendency to wear down causing bad connection to fan or just fails u will need a resistance reading multi meter to test the switch and fan --if the fan is in the engine - the fan clutch- and for ur year their were 2 designs 1st is a 3 blade and the blade is attached to the front of fan clutch the other is a 7 or 8 blade design where the fan is attached behind the fan clutch a little more work
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If its the interior fan[heater-a/c]unit the fan is against the firewall on the passenger side the dash control knob has a tendency to wear down causing bad connection to fan or just fails u will need a resistance reading multi meter to test the switch and fan --if the fan is in the engine - the fan clutch- and for ur year their were 2 designs 1st is a 3 blade and the blade is attached to the front of fan clutch the other is a 7 or 8 blade design where the fan is attached behind the fan clutch a little more work