My reverse lights will only work if I hold my shifter all the way back while in reverse. I looked under it today but couldn't find the switcvh that is descibed in the manual. There is a switch on the side but when I pulled it out it looked nothing like the switch pictured in the manual and it had no adjustment. Think its the transmission temp sensor but I'm not sure. Is it accessed from the top and that's why I can't see it?