1984 Honda Magna V45 - No power to fuel pump?
Bike was riding fine, then 1 day died on interstate. Got it home and was checking over a few parts. I was getting spark and proper air, so I checked to see if I had gas to carbs… None. I replaced the fuel cut relay and still nothing. I used a multimeter to check if I was getting power to fuel pump - I was not getting any power to pump. I took out fuel pump and tested it outside of bike and nothing. So I bought a new pump. Installed it and I'm still not getting an electricity to pump.
I was going over the electrical diagram thinking I had a short somewhere. I tracked the power from the battery through the system until it got to fuel pump. Along the way, I noticed that power goes into the low fuel sensor first. I was getting 12v to the sensor and nothing coming out. I hooked up the power wire to the sensor and test the other connector and I was now getting 12v coming out… Until I hooked the wire back up then I lost all power again.
Why would I have 12v going into the sensor and when I test the other prong, I get 12v until I hook the wire back up to that prong? I'm trying to avoid buying more parts until I really find out the root cause. I check all other connections for proper voltage and all is good except in the area of the low fuel sensor. I replaced all the connectors since the old ones were a bit rusty and I even ran a new wire (in this case it is the green wire from the fuel sensor to the fuel pump connector). Still no power.
Please assist!
If it was me I would bypass that low fuel sensor and learn to keep track of miles on my odometer and get riding again. All that does is give you a warning light that tells you to get some fuel. Live on the edge a little and go by the odometer.
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