Allante V8-273 4.5L (1991)
Radiator Cooling Fan Motor: Symptom Related Diagnostic Procedures
Test A: Both Coolant Fans Do Not Operate at All
A: BOTH COOLANT FANS DO NOT OPERATE AT ALL
1. Do Horns operate?
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If Horns operate, go to step 2.
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If Horns do not operate, check Fusible Link L. If Fusible Link L is open check circuits 2, 532 and 533 and 29 for a short to ground before
replacing the Fusible Link. Also check circuit 2 and circuit 1505 from 5114 to G102 for an open.
2. Measure the voltage to ground at Coolant Fan Relays 1, 2 and 3 connector (terminal 2) with the Ignition Switch in RUN.
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If battery voltage is measured go to step 3.
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If battery voltage is not measured at one or more relays, check circuit 350 for an open.
3. Check wiring to both Coolant Fans. Also check Coolant Fan terminal contact.
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If wiring and terminal contact are OK, go to step 4.
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If wiring or terminal contact is not OK, repair/replace as necessary.
4. Check circuits 535 and 536 for an open.
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If both circuits are OK, refer to PCM Replacement Check.
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If one or both circuits are not OK, repair/replace as necessary.
