Parisienne V8-305 5.0L (1985)
Radiator Cooling Fan Motor Relay: Technical Service Bulletins
Cooling System - Repeated Fan Relay Failures
Number
85-8-1
Date
11/84
Subject:
COOLANT FAN RELAYS - ALL FRONT-WHEEL-DRIVE VEHICLES WITH TRANSVERSE ENGINE
"Please discard previous bulletin 85-1-1 with above title due to incorrect section number."
We have heard of some repeated coolant fan relay failures. When a coolant fan relay has failed due to burned or sticking contacts, the circuit should be
checked for poor connections, excessive fan motor currents, or a chattering engine coolant temperature switch.
Fan motor continuous operating currents should not exceed 20 amps on low speed or 35 amps on high speed.
The coolant fan engine temperature switch can be checked with a test light. The light should turn on solid when the switch closes. If the light flickers,
the switch must be replaced. Both the high speed and low speed portions of the temperature switch should be checked.
A chattering engine temperature switch causes poor relay operation and eventual failure of the relay contacts due to excessive arcing.
