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fan swap ecu programing

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Old 06-12-2017, 01:42 PM
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Default fan swap ecu programing
hey all

did a efan swap over the winter now that summer was here couldnt get the ac to go on till i found out the ecu needed to be set up for A/C

now a/c is working and the fans come on but when its time to kick on hi speed the relay for it is getting pulsed signal (hear the relay clicking)

wrong setting? whats causing this?
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Old 06-12-2017, 05:54 PM
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Have you verified the signal (voltage) going to the relay from the PCM? If that current is constant, I would bypass the relay altogether to see if the fan comes on. I just had a relay go bad on my E-fan harness after my new motor was installed and that's how we found it.
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Old 06-13-2017, 10:44 AM
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no i have not tested any at this point played around with fan setting in pcm thats about it, i'm going to dig in to it today if i get time
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Old 06-13-2017, 03:04 PM
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theres a setting that uses the second fan output to control a vent flapper or something. you need to set that output to fan #2.
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Old 06-13-2017, 03:16 PM
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Originally Posted by TrendSetter
theres a setting that uses the second fan output to control a vent flapper or something. you need to set that output to fan #2.
Ok can you tell me where in hpt that is?
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Old 06-14-2017, 07:30 AM
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no, i use efilive
in efilive its under system > A/C > Parameters > G0106 A/C Auto Recirculation
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Old 06-16-2017, 06:22 PM
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see if this answers your questions

https://www.performancetrucks.net/fo...needed-539577/
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Old 07-05-2017, 12:37 AM
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Originally Posted by stroker87
hey all

did a efan swap over the winter now that summer was here couldnt get the ac to go on till i found out the ecu needed to be set up for A/C

now a/c is working and the fans come on but when its time to kick on hi speed the relay for it is getting pulsed signal (hear the relay clicking)

wrong setting? whats causing this?
Snake oiler put up a great link , hopefully it solves your problem.
Same thing happened to me with my swap with a van pcm, Relay would just pulse, changed the setting to "fan 2" now all good
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