I have a 2007 envoy i have about 10 fuses under the hood and about ten fuses under the seat they are good but want light hop my test light trying to feet my fog lights working why is These fuses good but want light my test light ?

if fuses are good but have no power, then check power from the battery to the fuse box and the ignition switch to find where power is lost from the battery to the box

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