I have a ‘99 k3500. I had a brake controller installed a couple months ago. From day one pretty much it threw an OL code, without a trailer. It finally started doing it more and more until it finally started doing it with my trailer hooked up, which causes the brakes on the trailer to cut out. I went to the shop a few times trying to get them to check it out, of course it wouldn’t do it when it was at the shop. I finally got them to replace everything. I picked it up today and it threw the OL code again. So it seems safe to say it’s something in my truck? Any ideas on what’s going on?
Thanks
Thanks