---------------------------------------------------------- TeamGrumman-List Digest Archive --- Total Messages Posted Sun 06/17/07: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:14 AM - Re: Fuel pump blowing a fuse? (flyv35b) 2. 08:25 AM - Re: Fuel pump blowing a fuse? (Peter H. Wei) ________________________________ Message 1 _____________________________________ Time: 06:14:09 AM PST US From: "flyv35b" Subject: Re: TeamGrumman-List: Fuel pump blowing a fuse? > Testing the circuit with the battery disconnected shows good connectivity > through the fuse. No short between the power source and the fuse body. > Replace fuse, master on, stobes work. Strobes off, fuel pump on, blown > fuse. > > Anyone had this experience before? Is is just a common fuel pump failure? If turning on the fuel pump is what is blowing the fuse, then it sounds as if there is a short to ground in the wire between the switch and the pump OR possibly an internal failure inside the pump which is also a short to ground. I'd look at where the wire goes through the firewall first. If the pump just doesn't work but the fuse is OK then you need to check the voltage at the pump. Cut the but splice connector at the pump and check the voltage there. If voltage is OK then replace the pump. They are very durable but they don't last forever. Cliff A&P/IA -- ________________________________ Message 2 _____________________________________ Time: 08:25:22 AM PST US Subject: RE: TeamGrumman-List: Fuel pump blowing a fuse? From: "Peter H. Wei" I had the same problem about a month ago. I found the fuse was getting blown after the strobe lights were turn on. This only happens intermittently. I checked the wingtip strobe tubes and found the right wing tube had turned black. I replaced the tube and the fuse has not blown since. Hope this helps. Peter Wei N26986 Cheetah -----Original Message----- From: owner-teamgrumman-list-server@matronics.com [mailto:owner-teamgrumman-list-server@matronics.com] On Behalf Of Peter Langlois Sent: Saturday, June 16, 2007 8:12 PM Subject: TeamGrumman-List: Fuel pump blowing a fuse? Sequence goes like this: Master on, fuel pump on, silence (except for the gyros spinning up.) Strobes, fuel pump, and starter are on the same fuse. What about a fuel pump would cause this problem? Is is a wiring issue inside the pump body, or more likely some short otherwise. Testing the circuit with the battery disconnected shows good connectivity through the fuse. No short between the power source and the fuse body. Replace fuse, master on, stobes work. Strobes off, fuel pump on, blown fuse. Anyone had this experience before? Is is just a common fuel pump failure? Thanks for the input. PETE Tiger N45319 Leesburg, VA ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message teamgrumman-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/TeamGrumman-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/teamgrumman-list Browse Digests http://www.matronics.com/digest/teamgrumman-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.