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Jimbo Slice
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| Posted: May 31 2012 at 2:51pm | IP Logged
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I have a 99 with the 6 cyl. I'm having major troubles narrowing
down the cause to this issue. I have to unplug the a/c fan or it will
run constantly even when the truck is off. I unplugged the triple
switch on the condenser and it still runs. I'm at a loss any input
would be great.
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frontierguy
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| Posted: Jun 02 2012 at 7:28pm | IP Logged
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The cooling fan relay ground is controlled by the triple
switch(which you unplugged) and the ECU. Look for any signs
of corrosion or moisture damage to the ECU. A possible fix
would be to install a toggle switch to interrupt the ground
signal to the cooling fan rely on the Light green/red wire.
PS your truck is a 99.5 the 99 did not have the electric
fan for the condenser.
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'10 Altima SL
Traded 08 Frontier for 16 Frontier SV CC Long box, quite an upgrade. I do miss the 6 speed and Dynomax ex.
Nissan Technician 25 + years
2011 John Deere X720SE
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Jimbo Slice
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| Posted: Jun 03 2012 at 1:15pm | IP Logged
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Thanks for the info. I dunno who owned it before me but Jesus they
beat the crap out of it. I cant complain it was free with 80k
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frontierguy
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| Posted: Jun 03 2012 at 7:24pm | IP Logged
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Free is good!!!!
__________________
'10 Altima SL
Traded 08 Frontier for 16 Frontier SV CC Long box, quite an upgrade. I do miss the 6 speed and Dynomax ex.
Nissan Technician 25 + years
2011 John Deere X720SE
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Jimbo Slice
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| Posted: Jun 04 2012 at 10:59pm | IP Logged
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How is the fan turning on if I unplugged the triple switch? shouldn't
the switch complete the ground or close for potential to go
through? So if it does just that then the fan shouldn't come on with
the triple switch unplugged? 
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frontierguy
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| Posted: Jun 11 2012 at 7:53pm | IP Logged
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It also grounds through the ECU, read my original response.
__________________
'10 Altima SL
Traded 08 Frontier for 16 Frontier SV CC Long box, quite an upgrade. I do miss the 6 speed and Dynomax ex.
Nissan Technician 25 + years
2011 John Deere X720SE
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Jimbo Slice
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| Posted: Jun 16 2012 at 6:37pm | IP Logged
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Ahh lol I skipped right over that part. 
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Nissan Frontier Forums : Problems / Technical
Topic: A/C fan
