Volvo Troubleshooting Questions? Ask a Mechanic for Answers ASAP
Welcome, I'm Chris (aka Moose) I prefer to work when others don't, I am here around lunch and after dinner till after midnight.working after noon till just after midnight.
With the AC on the fans also will not run?
Can you do electrical diag?
Here is the wire diagram.
At the fan control, can you confirm the red wire has battery voltage and the black wire has no resistance to ground?
If you unplug the ECM and the fan control and OHM test the violet wire from end to end is there no resistance?
Ohm testing this same wire to battery power and ground is there no continuity?
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Hello again Chris here,
Sorry you found the answer I provided elsewhere.
Can you tell me the results you got on the 3 questions which I asked about the wiring?
I hate giving tend to type answers because those rarely are accurate. Though since you have asked for it. Normally when a fan will not work and the fan has been replaced, it is very likely to be a failure within the computer.