SierraTango Posted November 4 Posted November 4 2002 Le Mans. Turn the key to on, kill switch off. No lights on dash other than neutral light. Pull in clutch the starter turns over but no start. Question1 I checked all the fuses all good. I don't hear the fuel pump coming on. Which relay from front of bike to back of bike should I be looking at? Which connector should I clean? Battery is good. Any help appreciated!
SierraTango Posted November 4 Author Posted November 4 Further to the question; headlight comes on but no high beam from switch, turn signals work, no horn.
Tomchri Posted November 4 Posted November 4 Check ALL connections. Relay 5 involve fuel pump. Underneat fuse box, 4 live wires make sure good connections. They supply + to relay side. Cheers Tom. 1
SierraTango Posted November 5 Author Posted November 5 I'm not certain what brand they are, however I read through the thread started by Paul 6506 "Fuel Pump?" and found a lot of information there. Looks like I can swap some relays around to test #5 which is the one closest to the back of the bike. I also see that if that #5 relay is bad, good practice is to change all 5 to Pickers brand? I have no idea when they were changed last. All all the relays the same? It's going to be a day or so before I can do the test. 1
docc Posted November 5 Posted November 5 6 minutes ago, SierraTango said: I'm not certain what brand they are, however I read through the thread started by Paul 6506 "Fuel Pump?" and found a lot of information there. Looks like I can swap some relays around to test #5 which is the one closest to the back of the bike. I also see that if that #5 relay is bad, good practice is to change all 5 to Pickers brand? I have no idea when they were changed last. All all the relays the same? It's going to be a day or so before I can do the test. Yes, get the Picker Components relays and put in all five positions. 2
audiomick Posted November 5 Posted November 5 (edited) 1 hour ago, SierraTango said: ... I have no idea when they were changed last. All all the relays the same?... Regarding changing them: I was advised by a bloke here in Germany who, I believe, used to run a Guzzi workshop. He changes out the relays every 4 years or so at the latest. In his opinion, they are a part that wear out, and should be changed before they fail. Whether they are all the same: no, originally they were not, as far as I know. Some had four pins, some five. The difference being, the ones with four pins just switch one thing on, the ones with five switch one thing or another thing on, depending on whether the are activated or not. I.e. when not activated, one thing is one, when activated that thing is off, and the other thing is on. But... the sockets are all the same, and the five pin relays work in place of the four pin ones. The five pin relays have a harder life, so it is a good thing to have five pin relays in all positions in order to be able to swap all of them with all of them when something critical stops working because of a dead relay. Edited November 5 by audiomick
MotoKnee Posted November 5 Posted November 5 4 hours ago, SierraTango said: I checked all the fuses all good. What method did you use to check fuses? It wasn't too long ago here someone just did a visual inspection and missed a bad fuse. 5 pages of troubleshooting later he checked them with a meter and found the source of his woes. 1
SierraTango Posted November 5 Author Posted November 5 Good advice that has happened to me before. I have a test tool with two leads, a bulb and AA battery. Obvious how it works I also use it to check guitar cords. 1
Pressureangle Posted November 6 Posted November 6 On 11/4/2025 at 9:43 PM, SierraTango said: Good advice that has happened to me before. I have a test tool with two leads, a bulb and AA battery. Obvious how it works I also use it to check guitar cords. Now you have to explain the guitar part. 2
Speedfrog Posted November 6 Posted November 6 You’ll notice @SierraTango didn’t say guitar strings nor did he say guitar chords . . . 2 1
SierraTango Posted November 6 Author Posted November 6 I play Jazz guitar professionally (that is I make money doing it) and have been doing that for several decades. My main working guitar is a 1990 Benedetto Cremona as seen in my avatar. I've learned from experience on gigs certain tools and spares to take along just like motorcycle riding-duct tape being one. I'm planning to swap out the relays today and hopefully solve the starting issue. I did order one Picker relay off Amazon there weren't many left in stock. I figured if that's the issue and I need to replace all of them I can buy the other 4 from MG Cycle. Thank for the help! 2
Speedfrog Posted November 6 Posted November 6 Get your relays here ==> Digikey | Picker Relays Beautiful guitar btw! 1
SierraTango Posted November 6 Author Posted November 6 OK so I swapped #1 to #5 and #2 to #4 positions. Turned key to on have N light only, headlight on no highbeam no horn. But when I hit the starter button does not turn over. It does turn over when I swap back to original positions but not starting. Relays are Siemans brand. What is the next step? Thanks for the compliment on the Benedetto it's a excellent instrument! 1
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