SierraTango Posted Tuesday at 09:42 PM Posted Tuesday at 09:42 PM 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 Tuesday at 10:09 PM Author Posted Tuesday at 10:09 PM Further to the question; headlight comes on but no high beam from switch, turn signals work, no horn.
Tomchri Posted Tuesday at 10:23 PM Posted Tuesday at 10:23 PM 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
docc Posted Tuesday at 11:46 PM Posted Tuesday at 11:46 PM What relays are under the seat now @SierraTango? 1
SierraTango Posted Wednesday at 12:21 AM Author Posted Wednesday at 12:21 AM 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 Wednesday at 12:29 AM Posted Wednesday at 12:29 AM 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 Wednesday at 01:51 AM Posted Wednesday at 01:51 AM (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 Wednesday at 02:08 AM by audiomick
MotoKnee Posted Wednesday at 02:08 AM Posted Wednesday at 02:08 AM 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 Wednesday at 02:43 AM Author Posted Wednesday at 02:43 AM 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 Thursday at 02:09 PM Posted Thursday at 02:09 PM 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 Thursday at 06:09 PM Posted Thursday at 06:09 PM You’ll notice @SierraTango didn’t say guitar strings nor did he say guitar chords . . . 2 1
SierraTango Posted Thursday at 06:17 PM Author Posted Thursday at 06:17 PM 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 Thursday at 06:36 PM Posted Thursday at 06:36 PM Get your relays here ==> Digikey | Picker Relays Beautiful guitar btw! 1
SierraTango Posted Thursday at 08:07 PM Author Posted Thursday at 08:07 PM 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
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now