wasnt posted earlier? any ford diesel mechanics?

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2002 fiesta tdci no glowplug light when key turned on? how do i know they are heating up? starts fine in warm weather bit reluctant now its cold..
 
You need a 12 volt test lamp to check they are still working.Lift the bonnet and connect the test lamp to the earth battery terminal (-ve)Switch on the ignition and put the test lamp onto the glow plug wiring terminal.If it lights up then the glow plugs are getting power.If not you need to check the fuse and the relay.Hope this helps
 
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