where is the glow plug relay

mrb friends. My 307 1.4 hdi vehicle broke down the other day and the vehicle does not exceed 3000 cycles. We have connected the car to the computer and the "glow plug b circuit malfunction" error says. one of the spark plugs did not work, we dismantled it because it is the market today, so we couldn't buy a new one and try it. In the description of the fault, the heating relay says insurance, I would appreciate wherever you help this relay. Thanks in advance friends ... & nbsp;

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