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LMM: Trailer Brakes
I was having the same problem and could not clear the service trailer brake warning, did the relay first the IDC next and still was the same. Finally replace the pressure sensor in the master cylinder cleared the service trailer brake warning message. I will test the trailer brakes tomorrow...- Blacksox
- Post #20
- Forum: Stereo & Electronics
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LMM: Trailer Brakes
Service trailer brake warning I still have not figured this out but I did notice without the trailer connected if I start the truck with my foot on the brake the warning light does not come up until I leave my foot off the brake. I don't know if this means anything Maybe the sensor in the...- Blacksox
- Post #18
- Forum: Stereo & Electronics
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LMM: Trailer Brakes
Help I have the exact same problem as you I've replaced the relay,checked fuses,replaced the IBC I cannot reset the service trailer brake warning the IBC allows me to control that up-and-down I have trailer lights when I hook it up Still no trailer brakes and cannot clear the service...- Blacksox
- Post #17
- Forum: Stereo & Electronics