I just installed two mirrors on my 2013 2500. When I took the stock mirriors out there was only one plug. With the new mirriors there is two plugs that needed to be plugged in. One was the same as on the old ones but im not sure what the other plug is for... maybe the marker lights? There was and extra slot in the block that the wires plug into and if fits right in but they didnt seem to work... any input.
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