Medium and Heavy Trucks
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Hi my name is***** will be glad to help. To test the circuit you will need to use a test light and volt/OHM meter if a visual inspection did not reveal any problem wiring or grounds. Also test the fuses as there are times a fuse is not making good contact in the terminals and you can not see that visually but will when testing for voltage. Let me know be sure to test all fuses, wiring and grounds.