Have a bunch of codes & a bunch of lights on the dash. So the truck is in limp mode I went to try and figure out my brake light issue changed the brake light switch didn't fix the problem then the truck went into limp mode with the wrench on the dash. So I can get my truck to shift out of gear if my lights are on and the interior lights are turned up as high as it will go. But the truck won't rev or have any response from the gas pedal. With the lights off the truck won't switch out of park but will rev up to like 2500rpm. I cleaned up the bcm because. I had taken the battery off to charge it and put a battery on it that had a bad cell I guess and when I tried to start the truck the theft mode was on so I put the old battery back on it and unplugged the bcm and cleaned it then reinstalled and the truck started fine. It is missing now slightly it seems. So backstory I had a bad Sunroof and didn't drive the truck for awhile so the Sunroof was leaking into the truck for a couple months. Any help would be nice I checked for some lose wires bad grounds nothing. I did notice in one of the emc plugs on the firewall it had some electrical jell?? On the plug. Also the lights that are on are the abs, brake light, airbag, rear right door ajar, traction control, check engine

 

Make sure the wire connector with an arm locking mechanism is actually locked in on the BCM.

 

what if one of them is broke

 

A wire? The connector?