ABS, Trac off, Service Engine Soon Lights...

[marauder12]

Hello,

I have a 2003 pontiac grand am with the ABS, Trac off, Service Engine Soon Lights coming on. Once they come on, if I let the car sit and off for about an 1 hour or so the lights won't be on. Until I drive it awhile and they will be back. Is that the hub and sensor causing the messages to come up? It is weird because I just replaced them at 30,000 and the car has 70,000 now. When I replaced them at 30,000 I could hear a grinding from the bearings. Is there a special spray I could use to clean the connectors? What is the likely hood that it is the wiring harness leading into the car?

Thanks in advance

[oldblu65]

The wiring go to the sensors is often the problem as the wiring is exposed to the elements and subject to damage . I'd check for anything obvious and make sure the wiring is secure and not flopping around .