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SAABDOCTOR · 05-29-2013, 11:45 AM

HI RON In all the years doing electrical work on cars. I have found this to help. start at then end. power yes or no. if yes have a beer if no go to the begining ( the power source) if no buy a new battery ha ha if yes, co to the middle of the circut power yes go half way to the end. if no go half way back and you will find the open. in your case the end is the brake drums on the trailer. the middle is the 7 pin plug the source is the fuse box half way to the plug is the controler half way after the plug is the junction box in the pin box 5th wheel) or under the frame (tt) have fun

05-29-2013, 11:45 AM	#6
SAABDOCTOR Senior Member Join Date: Aug 2011 Location: WESTERN,CT Posts: 2,095	HI RON In all the years doing electrical work on cars. I have found this to help. start at then end. power yes or no. if yes have a beer if no go to the begining ( the power source) if no buy a new battery ha ha if yes, co to the middle of the circut power yes go half way to the end. if no go half way back and you will find the open. in your case the end is the brake drums on the trailer. the middle is the 7 pin plug the source is the fuse box half way to the plug is the controler half way after the plug is the junction box in the pin box 5th wheel) or under the frame (tt) have fun __________________ BARNEY AND CHRISTINE 2010 MONTANA 3750FL 2005 DODGE 3500 DUALLY TD 2 RESCUE PUPS: SUSITNA AND CRYSTAL. RIP ALYESKA!