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Jerry, Master Mechanic
Category: Dodge
Satisfied Customers: 1754
Experience:  ASE Master tech, 30 years exp. troubleshooter, driveability tech
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Check engine light on with fault code fan relay, 2000, 5.9L

Customer Question

Check engine light on with fault code for rad fan relay, 2000, 5.9L 2 wheel quad cab
have repaced PCM (2 times), fan motor assemble and relay.
both fuses check ( batt. 9mo old) truck starts and runs fine but?
dash panel fuse#9 10A to relay term#2 (86) O/K w/12.3V
PDC fuse#2 30A to relay term#3 (30) O/K w/12.7V
Wire #C24 from PCM to relay term#4 (85) tested O/K Connected ohm check
Wire #C23 from fan motor to relay term#5 (87) applyed 12V and fan runs
I have been using truck with 30A rated switch by removing relay with manul switching
of relay sockets term,s #3 and #5. Truck stays cool with day-time Houston, tx at 100F
What could be wrong? chk eng light still on and $700 plus spent to date.
Submitted: 1 year ago.
Category: Dodge
Expert:  Chad replied 1 year ago.

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