Tri­umph GT6

Practical Classics (UK) - - CONTENTS -

The GT6’S first MOT test af­ter its lengthy body surgery re­sulted in a few ad­vi­sories: a slight im­bal­ance on the rear brakes, a ‘light mist­ing of oil’ on a rear shock ab­sorber and low bright­ness from the brake lights. The rear brakes were fixed by free­ing off the slid­ing slave cylin­ders and lightly sand­ing the brake shoes, then I fit­ted a new pair of GAZ dampers.

I dou­ble-checked the brake light wiring to make sure the stop light and side light con­nec­tions hadn’t been re­versed. These were fine. Out came the mul­ti­me­ter show­ing mere eight volts at the bulbs, ex­plain­ing the poor light out­put.

The GT6 has a night dim­ming re­lay, re­duc­ing bright­ness af­ter dark. Clever idea, un­til it goes wrong. The volt­age drop at the brake lights was due to the heavy cur­rent drawn by the 21-watt bulbs. A set of Hal­fords LED stop/tail light bulbs which use mere mil­liamps avoided the volt­age drop and are so bright they can’t be ig­nored.

LED bulbs re­solved the brake light is­sue.

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