Front heated seats work and then they dont. Is there a relay. on 2005 Hummer H2

front switch lights come on momentary and then shut off. Then all of a sudden they work.Getting cold can someone help.

Asked by for the 2005 Hummer H2
Likely you have a seat heat element that is shorting out. Control module may be seeing too much resitance and shuting system down. Compatible scan tool can check that system for fault codes.