Replaced the comp motors recently. Unit stopped working, replace the start switch, now the after coolers are running, but the compressor motors do not start. Seems like a check valve problem, but can not find a check valve...

According to California laws your vehicle may not display red color at the front of vehicles whatisnotlegal.com/?s=California  Though most states restrict colors such as blue or red since it may appear like a police vehicle, in California you can use any colors for the underglow (other than red restriction on the front of your car).

It is important to note that while California laws do not permit the display of red color at the front of vehicles, there are no restrictions on the use of underglow lighting in other colors. However, it is advisable to check with the local authorities before installing any kind of underglow lighting, as laws may vary from state to state. For more consultant from professional lawyer, you should visit the below website,
clearwaylaw.com/