A/C does not work when headlights are on. - Nissan Armada Forum: Armada & Infiniti QX56 Forums
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post #1 of 5 Old 01-26-2013, 12:53 AM Thread Starter
sidgarza
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A/C does not work when headlights are on.

Just like the title says. A/C works fine when headlights are off then once they are turned on, the A/C either turns off or stay stuck on that setting. I am thinking either the blower motor resistor or ignition switch (based on what I have read on other forum). This all started a couple of weeks ago when my ECM relay blew. Whatcha think guys?


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Last edited by sidgarza; 01-26-2013 at 01:34 AM.
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post #2 of 5 Old 01-26-2013, 01:22 AM
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Re: A/C does not work when headlights are on.

Does your AC blower work? I think if the blower doesn't work the AC stop. Also like u mention could be ignition switch. I guess to test that switch when it isn't working wiggle the ignition to see it if start?

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post #3 of 5 Old 01-26-2013, 01:32 AM Thread Starter
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Quote:
Originally Posted by ntrddragn View Post
Does your AC blower work? I think if the blower doesn't work the AC stop. Also like u mention could be ignition switch. I guess to test that switch when it isn't working wiggle the ignition to see it if start?

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Yeah everything (speed/temp/position/rear) works fine but once I hit the headlights it turns off.


TRADED IN: 2005 Nissan Armada SE Smoke: 2.5 NCD front/PRG 2" rear, 305/55 Nitto Terras, 20" Xd Hoss, Bilstein HDs, 18" Magnaflow Muffler (12" exhaust tip removed), 4" Airaid MXP Missile Intake, Tint (35%front/5%back), Bedlined Mirror Caps & Door Handles, Plasti Dipped Front/Rear Bumper, Removed Air Dam, Debadged, Smoke LED Tail Lights, Grillcraft Mesh Grill, Headlight Mod on Halo Projectors, 5000k Lows/Fogs, 5000k Switchback Turnsignals, Interior LED Swap, Superchips Tuned.

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post #4 of 5 Old 01-26-2013, 01:48 AM
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Re: A/C does not work when headlights are on.

Did u try wiggling the ignition after u turn on the head light?

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post #5 of 5 Old 01-26-2013, 07:00 PM
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You said the trouble started when the ECU relay was replaced. That required moving the IPDM around. Its possible that one of the cables attaching to the IPDM was loosened. Check to see that all cable pugs are secure. The IPDM is the logical place to look since it controls all the functions you are talking about.
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