Tem­per­a­men­tal fuse­box

Car Mechanics (UK) - - Tales From The Workshop -

Trac­ing elec­tri­cal prob­lems can of­ten be a long, drawnout process. This 1999 Ford Mondeo was in the work­shop be­cause the heater blower mo­tor was not op­er­at­ing. It was also noted that the air­con­di­tion­ing switch – which is part of the blower switch – was not op­er­at­ing ei­ther.

Re­mov­ing the con­trol panel with a view to pos­si­bly hav­ing to fix the switch panel, we dis­cov­ered that there was no power to the switch pack. This meant we needed to trace back along to the source of the prob­lem. Drop­ping down the fuse­box, we es­tab­lished that power was go­ing in, but there was no feed out to the blower mo­tor and switch panel. Af­ter prod­ding around with a volt­meter, we sud­denly heard the blower fan roar into life.

We had fixed it, but for how long? It was pretty ev­i­dent that the fuse­box was the prob­lem but, try as we might, the newly re­stored con­nec­tion could not be bro­ken again. Af­ter ex­plain­ing the sit­u­a­tion to the owner, he was quite happy to have the ve­hi­cle back on the con­di­tion that it would need a new fuse­box if the prob­lem re­oc­curred.

Af­ter a prod around in­side the fuse­box, the con­nec­tion was re­stored.

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