SOMETIMES one can tell by looks BUT get a tire gage out and KNOW what the pressure is.
Winter is the main season for keeping an eye on tire pressure.
If anything get below 25 lbs have the tire inspected, rim cleaned (sanded), and remounted in insure it keeps air.
Good luck and post back on your findings.
Thanks a lot! I did a walk around with that in mind because all other problems were listed with the lights. None of the tires looked low but I'll have to top them all off, may be a little bit sensitive. Thanks again, Jeff