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</o:shapelayout></xml><![endif]--></head><body lang=EN-CA link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='mso-fareast-language:EN-US'>I have a relay to control the eFan on my TR4 and it failed after less than 1000 miles.<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Keith Stewart<o:p></o:p></p><p class=MsoNormal>keithstewart@bell.net<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US>From:</span></b><span lang=EN-US> TERRY SMITH [mailto:terryrs@comcast.net] <br><b>Sent:</b> July 23, 2017 5:38 PM<br><b>To:</b> triumphs@autox.team.net<br><b>Subject:</b> [TR] Yeah, I know, the Overdrive...Again....<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p><span style='font-size:12.0pt;font-family:"Helvetica",sans-serif;color:#333333;background:white'>So the overdrive worked great on the day after I adjusted the linkage. The next day, slipped in and out. Fluid is topped off and am using Redline MT-90 per all recommendations. The fuse is NOT blown, but when I test, I get no clunk of engagement nor snap from disengagement. I've checked and rechecked all the wires leading in the system. Joints are soldered, solid and insulated (shrink tubing). </span><o:p></o:p></p><p><o:p> </o:p></p><p><span style='font-size:12.0pt;font-family:"Helvetica",sans-serif;color:#333333;background:white'>Except.</span><o:p></o:p></p><p><o:p> </o:p></p><p><span style='font-size:12.0pt;font-family:"Helvetica",sans-serif;color:#333333;background:white'>The relay. I didn't even know I had one. Leastwise, I'd forgotten since I first wired the thing a dozen years ago. </span><o:p></o:p></p><p><o:p> </o:p></p><p><span style='font-size:12.0pt;font-family:"Helvetica",sans-serif;color:#333333;background:white'>Relays are simple mechanisms. Looks like a resister, maybe a diode in there. But diodes blow and resisters can die. </span><o:p></o:p></p><p><o:p> </o:p></p><p><span style='font-size:12.0pt;font-family:"Helvetica",sans-serif;color:#333333;background:white'>Just curious, though. It's been 50 years since I was working on comm/nav electronics on F4-Phantom jets so am not clueless, but definitely rusty, about electronics. Are simple relays more or less bullet-proof, or do they have some sort of reputation I'm not aware of....????</span><o:p></o:p></p><p><o:p> </o:p></p><p><span style='font-size:12.0pt;font-family:"Helvetica",sans-serif;color:#333333;background:white'>Thank you, everyone,</span><o:p></o:p></p><p><span style='font-size:12.0pt;font-family:"Helvetica",sans-serif;color:#333333;background:white'>Terry Smith, '59 TR3A, A-Type OD, TS 58667</span><o:p></o:p></p><p><span style='font-size:12.0pt;font-family:"Helvetica",sans-serif;color:#333333;background:white'>New Hampshire</span><o:p></o:p></p></div></body></html>