JJMills1993 Posted September 5, 2022 Share Posted September 5, 2022 I’ve been scouring this forum and others for the last few weeks trying to find an answer to my current problem I bought a 2000 model year 1100XX with a known electrical issue. No fuel pump cycle upon turning key and handlebar switch on. I immediately tore it apart to find out somebody had tried to take power from somewhere else and feed pump. The harness was subsequently melted in multiple places. Supply ground for PGM-FI computer. +12v black white wire which comes off the main power supply distribution to the grey ECU connector. I tore the harness apart removed and replaced all burned/exposed electrical wires. Reassembled only to find out that with the ECU plugged in when the key was turned on it would immediately pop the 30amp PGM-FI fuse. With the ECU unplugged no issue. I got my hands on a used ECU from eBay. Plugged it in and it no longer blows the 30amp PGM-FI fuse. I still do not have power to the fuel pump and I believe it to be a ground issue but need some expertise to help guide me here. I have traced and have power through the electrical connections I should until I get to the engine stop relay. I have Voltage and continuity tested ignition and handlebar switch. The power that comes into the engine stop sensor is good. It comes in and out of the tip over sensor under the seat. I do not have a ground to cycle the engine stop relay and can’t pinpoint the issue. I have bench tested the relays all good. Does the ecm provide a ground? Is my new to me ECM bad? The diagram reads I should have 12v at the Bl/W wire at that relay to feed the fuel pump relay. Power is there just not getting from the R/W main power wire through the known good relays to provide power to fuel pump relay. Harness is back off the bike and stripped down to re-Inspect but I haven’t found any connection issues this time. Sorry for the long winded write up. Just looking for someone with more electrical theory education than I have. Quote Link to comment Share on other sites More sharing options...
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