SES light on, no codes?
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Joined: Oct 2006
Posts: 77
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SES light on, no codes?
Guys, this is a weird one.
Wife came home in the vette last night asking why the lights were going dim every 5 seconds. I looked and it seems every 5 seconds the cooling fans were trying to kick on. I could hear them try to start spinning for a split second and then they'd stop. So this explains hte lights dimming.
Secondly the SES light came on. I was tired and didn't feel like messing so waited until this morning to pull codes. The only currrent codes i have are HVAC codes. The SES light is still on though. I know this isn't much help...but any thoughts on where ot start troubleshooting? Even my Historical codes i pulled up in the DIC are all HVAC/LDCM/RDCM codes.
Wife came home in the vette last night asking why the lights were going dim every 5 seconds. I looked and it seems every 5 seconds the cooling fans were trying to kick on. I could hear them try to start spinning for a split second and then they'd stop. So this explains hte lights dimming.
Secondly the SES light came on. I was tired and didn't feel like messing so waited until this morning to pull codes. The only currrent codes i have are HVAC codes. The SES light is still on though. I know this isn't much help...but any thoughts on where ot start troubleshooting? Even my Historical codes i pulled up in the DIC are all HVAC/LDCM/RDCM codes.
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Joined: Jan 2007
Posts: 54
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From: St. Charles MO
Guys, this is a weird one.
Wife came home in the vette last night asking why the lights were going dim every 5 seconds. I looked and it seems every 5 seconds the cooling fans were trying to kick on. I could hear them try to start spinning for a split second and then they'd stop. So this explains hte lights dimming.
Secondly the SES light came on. I was tired and didn't feel like messing so waited until this morning to pull codes. The only currrent codes i have are HVAC codes. The SES light is still on though. I know this isn't much help...but any thoughts on where ot start troubleshooting? Even my Historical codes i pulled up in the DIC are all HVAC/LDCM/RDCM codes.
Wife came home in the vette last night asking why the lights were going dim every 5 seconds. I looked and it seems every 5 seconds the cooling fans were trying to kick on. I could hear them try to start spinning for a split second and then they'd stop. So this explains hte lights dimming.
Secondly the SES light came on. I was tired and didn't feel like messing so waited until this morning to pull codes. The only currrent codes i have are HVAC codes. The SES light is still on though. I know this isn't much help...but any thoughts on where ot start troubleshooting? Even my Historical codes i pulled up in the DIC are all HVAC/LDCM/RDCM codes.
when the a/c turns on, it automatically turns on the cooling fans regardless of engine temp to pull air through the condensor. i would pursue your hvac codes further because it sounds like its trying to turn your a/c on. check the compressor also and see if it is trying to engage the clutch.
Thread Starter
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Joined: Oct 2006
Posts: 77
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Good point. It actually sounds to me like maybe a fan relay is dorked. The coolant temp was 210 degrees when i looked at it (several minutes after shutting the car off)...not hto enough to kick the fans on. So the AC probably was on. I'll go give that a shot, maybe a combination of issues.
