Started off intermittently that the ABS and Seatbelt lights would come on in damp weather. Now they are on permanently. It flashes no codes. I even reset the codes and it's still there. Has anyone experienced this? I tried a search to no avail.
NEED HELP ABS, Seatbelt lights on
- Thread starter nozzleman
- Start date
Cant help you any on the seatbelt one..
However, the ABS one could be a wheel speed sensor. They get gummed up, or a rust build up on them from the ABS Tone Ring. On the front, its really as easy as replacing the hub (comes with new sensor and wire). The rear I have yet to do, so I dont know.
However, the ABS one could be a wheel speed sensor. They get gummed up, or a rust build up on them from the ABS Tone Ring. On the front, its really as easy as replacing the hub (comes with new sensor and wire). The rear I have yet to do, so I dont know.
They come on as a pair. Not sure if it's related but the map sensor DTC came on (P0107 low voltage). That one did throw a code.
Mooseman
Moderator
What are you using to read codes? For ABS codes, you need more than just a basic reader to get those.
Check all your grounds
Electrical Ground locations
Another possible shotgun you could try is the ignition switch which can cause some electrical gremlins.
Check all your grounds
Electrical Ground locations
Another possible shotgun you could try is the ignition switch which can cause some electrical gremlins.
Found a bad wheel sensor. Being winter, I had the shop that does my Corvette work replace it. Functionally, the brakes and abs work like it’s supposed to. He says that the body computer gets all of the signals it needs but the abs and belt lights are on, due to a short or open somewhere in the wiring, making the lamps stay lit. I’m at a loss as to where to start. Any ideas?
Mooseman
Moderator
For the belt light, yeah, it's likely a wiring issue or a bad switch in the buckle. For the ABS, you'd need to read the codes to know what's going on.
cornchip
Member
- Jan 6, 2013
- 637
This past Wednesday, my wifes 2006 Equinox was disabled in the driveway with 'low power' and about a half dozen ACC pedal related codes stored. I did some checking online and found a possible cause. Our Equinox has a leaky sunroof and last summer filled up the front drivers floor pan with water and has likely leaked since. GM bulletin # 07-06-04-019E describes how water flows down the front windshield pillar and into a major harness called 'IP connector' or more correctly C203. This connector is behind the drivers left side kick panel and is common across multiple other different GM models. After finding the connector (it's a 1"x3" harness to harness connector with a cam lock).....I disconnected and reconnected a good dozen times and filled one half of the connector pins with dielectric grease before final reassembly. This instantly fixed the low power,ABS and one other light. The check engine codes I cleared separately with a scanner. It now is flawless.
While it's 99% unlikely to be your issue, renewing all accessible connectors is worth the effort as the number of vehicles this affects is staggering. I copy and pasted the list. FYI.....different symptoms occur like low power,buzzing speakers or inoperative power windows ,ABS light etc for different models while they all share this exact same plug.
PDF LINK
While it's 99% unlikely to be your issue, renewing all accessible connectors is worth the effort as the number of vehicles this affects is staggering. I copy and pasted the list. FYI.....different symptoms occur like low power,buzzing speakers or inoperative power windows ,ABS light etc for different models while they all share this exact same plug.
PDF LINK
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cornchip
Member
- Jan 6, 2013
- 637
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cornchip
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- Jan 6, 2013
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And a few more...
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04 Envoy BTW.
no codes are showing and brakes and belts work normally.
I have to believe that there is something in the dash lamp circuit , in between the bcm and lamp that may be pinched or oxidized. Just don’t know what connectors or grounds are involved Or where they are.
no codes are showing and brakes and belts work normally.
I have to believe that there is something in the dash lamp circuit , in between the bcm and lamp that may be pinched or oxidized. Just don’t know what connectors or grounds are involved Or where they are.
This was previously asked but I don't see it answered.... Do you know for a fact that the scanner used actually communicates with the EBCM, BCM, SIRS, etc. modules? Many, if not most scanners only request emissions related codes and never even attempt to connect to anything but those modules that deal with emissions.
This statement seems a little off to me. The indicator light for the ABS is not controlled by the BCM. It is controlled by the ABS system (EBCM module). Unless he means that the EBCM is getting a signal from a wire like a wheel speed sensor that is shorted or open?? Similarly, the seat belt switch isn't wired to the BCM at all. That switch is wired to the SIRS module.
For clarification/confirmation,,, we are talking about the actual seat belt reminder indicator and not the similar looking airbag warning light located just to the right of the seat belt reminder? And if it is in fact the seat belt reminder that is on do the chimes also sound??
And there are no wires between the BCM or EBCM or SIRS modules and the indicator lights, they are turned on or off by data messages, not direct wiring. One could think of it like the various modules sending a text message to the cluster telling it to turn on or off lights x, y, or z. You cannot short circuit that. So if it is indeed a short or open they would need to be in more than one system and be located in that system and not between the cluster and the system.
Now if there is a communications loss between the module that is controlling an indicator light and the cluster then the light for that system will turn on.
Here is an example where I turn off the airbag light on my benchtop setup. The first time it is seen to go off for several seconds then turn back on. It comes back on because the cluster does not see a "node awake" message from the system that turned the light off.
But the second time when I keep sending a state of health (node awake) message (seen on the phone screen) the light stays off until I stop sending that "node awake" message.