docc Posted 18 hours ago Posted 18 hours ago 10 hours ago, Sam P said: Update from yesterday evening: Plugged relay 2 back in. Battery terminals read 12.7 key off, 12.6 key on, 13.0 when I took it off the tender about an hour ago. On 9/12/2025 at 2:04 PM, Sam P said: Have been hanging out here since February - trying to learn stuff - when I bought a nice low mileage 2001 V11S. Rode 6K fun miles between then and August, with no drama, and then the charging system started acting up: first overcharging and destroying a new Odyssey battery . . . Let's talk batteries, @Sam P. Did you replace the "destroyed Odyssey" with another Odyssey, or something else? A voltage loss from 13.0 to 12.7 in an hour is not a good sign for an Odyssey. There are specific parameters to "condition" the Odyssey that may help contribute to a solution. "trickle chargers"/ "tender" are known to be damaging to the Odyssey battery unless the voltage is adequate, yet will not "charge" the Odyssey with sufficient amperage (at least 6 amps). 1
gstallons Posted 18 hours ago Posted 18 hours ago SamP , did you reconnect the red/green wire to the V reg ? Also , there should be continuity between the 2 pin connector consisting of a blue wire and a red/black on the regulator wiring harness of the bike wiring harness.
MotoKnee Posted 17 hours ago Posted 17 hours ago Mostly for helping myself to understand the circuit and the suggestions for troubleshooting, might be of help to others. If someone sees errors, I will correct them. 2
audiomick Posted 17 hours ago Posted 17 hours ago Mea culpa: I just realised I didn't do the math to the end here I've corrected myself there, and here
docc Posted 17 hours ago Posted 17 hours ago 32 minutes ago, MotoKnee said: Mostly for helping myself to understand the circuit and the suggestions for troubleshooting, might be of help to others. If someone sees errors, I will correct them. Nicely simplified schematic. Just a note, that the red/black output from "Headlight" Relay (#2) does supply the brake light (also horns), but not the entire left switch cluster (i.e.: not the turn signals). Perhaps Fuse #5 (F5) should be indicated ahead of the Starter Relay. Turn signals are Fuse #7 (F7) 1
MotoKnee Posted 16 hours ago Posted 16 hours ago 58 minutes ago, docc said: Nicely simplified schematic. Just a note, that the red/black output from "Headlight" Relay (#2) does supply the brake light (also horns), but not the entire left switch cluster (i.e.: not the turn signals). Perhaps Fuse #5 (F5) should be indicated ahead of the Starter Relay. Turn signals are Fuse #7 (F7) good suggestion, I will pour some Evan Williams and make some changes 1
gstallons Posted 9 hours ago Posted 9 hours ago Looking at this simplified diagram , you should be able to disconnect the two wire connector (blue wire & red/black wires) and apply 12v and - to these two wires and the gen light turn on. This will test the bulb and wiring circuit. 1
Sam P Posted 2 hours ago Author Posted 2 hours ago 6 hours ago, gstallons said: Looking at this simplified diagram , you should be able to disconnect the two wire connector (blue wire & red/black wires) and apply 12v and - to these two wires and the gen light turn on. This will test the bulb and wiring circuit. Just did this with key on/engine off, and the battery light did indeed light up. Are we making some progress here? I hope so! 1
Sam P Posted 1 hour ago Author Posted 1 hour ago 17 hours ago, gstallons said: The oil light , gen light and low fuel light are connected to the + terminal of the tach (I assume it works ?) , the front brake light switch (does it work?) , turn signals (do they work?) and rear brake light switch(does it work?) Tach, front and rear brake light switches are working 1
Sam P Posted 1 hour ago Author Posted 1 hour ago (edited) 17 hours ago, docc said: The oil light issue may be a clue. @Sam P, can you pull the connector from the oil switch and ground it (KOEO) to see if the oil light illuminates? Just did this and the oil light fires up! There was a bit of corrosion in this connection, and I hit it with some Deoxit and wiped it down. Edited 1 hour ago by Sam P Added Deoxit comment 2
Pressureangle Posted 1 hour ago Posted 1 hour ago On 9/21/2025 at 4:30 PM, docc said: Well, there is continuity through that circuit (good). Not sure if 15 Ohms is high. What is the Ohm reading from Relay#2 to the black wire at the regulator connector? Haven't bread each response, on the road- but *any* wire circuit should show very near zero ohms. If the lamps are in this circuit, maybe ok. If not, a serious fault. 1
docc Posted 36 minutes ago Posted 36 minutes ago How about running a jumper wire from the battery positive to the black wire into the regulator (turn the connector 90 degrees to leave the white->blue connected). KOEO: battery light on? Start up and normal charging at some rpm with no 4000 rpm light?
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