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The cord was not pluged in at the bh.The block heater sounds like a compresser for an air ride pump. is this going to short out my van? Or should i try pugging it in any way?
First make sure the BH red power plug is in the BH, then do a continuity test with a meter on the main plug wires at the grill. If there is no continuity check the wires for breaks just behind the 120V plug. Pull on the wires and you can see the break as the shielding gets smaller, cut off the end. If the 2 power wires now have continuity through the BH just replace the 3 prong plug.