Originally Posted by
Rob M
In the end the issues with my original RCM related to the transmission, speedometer, and various brake/traction control MILs were solved by replacing the traction control relay. Engine would still not crank and continue running until I cleaned the contacts on the engine and fuel pump relays. So, at some point I will likely need to replace those relays as well. For now the RCM works fine and I have also procured a spare.
If the contact faces on the relay are pitted and not polished they will soon get pitted again and you will have the same problems with them. Change them now before you get stuck miles from home.