KiwiTR6 Posted December 30, 2018 Report Share Posted December 30, 2018 Hi all. Started the TR in the shed today to circulate oil, exercise clutch etc, and noticed that the oil pressure warning light (which has always been disappointingly pale when activated compared to the ignition light) illuminates partially when the headlights are on and the instrument light dimmer is turned from off to on. That is, when the engine is stationary the light goes from pale to a little brighter, and when its running the light changes from off to a very pale (but noticable) glow. I suspect voltage is backfeeding from somewhere. Any suggestions as to what might be going on? Regards. Quote Link to post Share on other sites
JochemsTR Posted December 30, 2018 Report Share Posted December 30, 2018 You can try this, I provided Oil Switch and warning light with its own 12V. No more hassle with pale or interference from other sources that may be there. Jochem Quote Link to post Share on other sites
DaveN Posted December 30, 2018 Report Share Posted December 30, 2018 You’ve got a poor earth somewhere!. Start by looking at the earths on the back of the cluster. Quote Link to post Share on other sites
Iain M Posted January 1, 2019 Report Share Posted January 1, 2019 I had similar at night with a running engine (no issue with starting brightness though). Try removing the speedometer illumination bulb temporarily from the back and see if that stops the dim glow on the oil pressure lamp. It did on mine so i suspect some internal bulb shrouding in the speedo is missing/damaged. Quote Link to post Share on other sites
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