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ABS, VDC Off and SLIP lights on

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  #1  
Old 08-20-2011 | 01:19 AM
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ABS, VDC Off and SLIP lights on

Hey guys,

I have a stock 2004 G35 with sport package. I got an oil change done from jiffy lube and then a day later I noticed some strange behavior. When I start up the car and drive everything on the dash is clear. If I lightly press on the brake pedal things are still fine but when I press a little firmly on the pedal to say stop at a traffic light, the ABS + VDC + SLIP lights all come on. When I turn off the car, the lights go away until I press on the brake pedal again.

I used an OBDII scanner and got the ECU code P1805. Doing a little bit of research online it seems like this code points to the brake switch. I looked into the owners manual that I have but didn't see anything about a brake switch in there. Has anyone else had this problem? If so any pointers for resolution?

Any help will be much appreciated.
Thanks
 
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Old 08-20-2011 | 08:04 AM
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Check your brake fluid level.
 
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Old 08-20-2011 | 01:49 PM
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I checked the fluid level it's a little less than at the Max marker. I thought that wouldn't be the cause but I'll try top it off. I checked fuse box all fuses look good. I changed my pads and rotors last year. The pads are in good shape and I don't think the thickness of the rotors has reduced much specially since I haven't driven the car much.
 
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Old 08-20-2011 | 11:02 PM
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  #5  
Old 08-20-2011 | 11:23 PM
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Interesting... So for you it was your breaks... I was looking at my brakes and the outter ones seems fine... I guess I'll have to pull off the tires and check the inner ones. I am just surprised since I got brakes and rotors done last year May and I've barely driven the car at all. Maybe a total of 6K miles.

I might want to check my lights like one of the guys wrote on your thread. Thanks for pointing me to your thread djfarhan
 
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Old 08-20-2011 | 11:40 PM
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^ anytime, just search your topic at question before you post it, might save you some time.
 
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Old 08-21-2011 | 08:13 PM
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Confirm your brake lights are coming on as well?

Mike
 
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Old 08-27-2011 | 07:10 PM
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Hey Mike,

I did what you asked and guess what, the lights aren't coming on at all. So I figured maybe a bad brake light switch since that's what the code P1805 seems to indicate but no change. The lights are still not coming on. Any ideas on what to do next?
 
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Old 08-27-2011 | 07:41 PM
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ok I pulled out the stop lamp fuse and yup it was blown. I replaced the fuse so now the brake lights are coming on when I hit the brakes, however, the spoiler led it not coming on. Any suggestions?
 
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Old 08-27-2011 | 11:10 PM
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Do a search about trunk wiring....
The lines going up that rubber tube from the trunk, to the trunk lid get streched & break in there....I would open that up & take a look...
Does your remote open the trunk?

Is the spoiler factory?

Mike
 
  #11  
Old 08-31-2011 | 02:12 AM
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so in 8 hours I have gone through about 4 stop lamp fuses. Something is blowing the fuse really quick.

Mike - the trunk opens using the remote so that is working fine and the spoiler is factory.

I remember while driving I could feel drops of water fall on my foot by the clutch but I am not sure where this came from. It was pretty hot outside and I had the AC going but I don't think it would cause condensation and water to drops to form unless I am wrong.
 
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Old 08-31-2011 | 09:32 AM
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I would start out by replacing ( or inspecting ) all the stop lights in the tail lights.
2nd I would remove the pressboard black trunk finisher & inspect the wiring to the 3rd brake light...
Finally I would remove the tube boot between body & trunk & have a looksie

Mike
 
  #13  
Old 09-02-2011 | 08:46 PM
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I know the stop lights work because when I put a new fuse in, the brake lights come on but the only thing that doesn't come on is the 3rd brake light integrated in the spoiler. I am not sure how to remove the flap at the bottom of the light to test if there is current flowing to the 3rd light. Sorry if this is a newbie question but how do I remove this so I can access the light?

I am hoping I don't have to go as far as the tube boot . I wonder if the 3rd light is out or not so I want to remove it... Any idea how we can test it
 
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