'85 fuel pump won't run


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Missourimike
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'85 fuel pump won't run

Postby Missourimike » Sun Oct 21, 2012 2:46 pm



I've got an Aspencade here that has no electricity to the electric fuel pump. No fuses blown, checked all circuits for power, they're OK. Which fuse is the fuel pump operated off of? Everything else seems to work, zilch on 12v to the pump. Checked the connection that comes from the harness, no power there. Meter shows the ground wire is OK and has continuity. I'm stumped!



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tom84std
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Re: '85 fuel pump won't run

Postby tom84std » Mon Oct 22, 2012 8:32 am

Sound like the relay isn't doing it's job for whatever reason. Look behind and to the right of the headstock for a black plastic box mounted in rubber with wires coming from the bottom. I'd also put a + jumper from battery to the fuel pump's +lug just to see if it does run.

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virgilmobile
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Re: '85 fuel pump won't run

Postby virgilmobile » Mon Oct 22, 2012 9:36 am

I also recall that the relay will not operate unless there is spark.
Kill the ignition and the pump relay cuts off too.

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Missourimike
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Re: '85 fuel pump won't run

Postby Missourimike » Mon Oct 22, 2012 11:51 am

Checking for fuel pump being OK, I had already jumpered from the battery to the pump, the first thing I tried. It's OK.
As for "head stock(?)", is this the box under the handlebars. The supply wire to the pump is white, and a number of white wires go into this box. To get to this box, looks like I'll have to take off a good bit of plastic on the false tank. To the left of the right fairing pocket, is a rubber cover, and under it is another rubber covering a couple of multi-wire spade connectors. No relay there that I can find.
This bike belongs to a friend that I'm trying to help out. If it were a GL1000 or 1100, I'd have no problem getting to anything. I appeciate the help, fellas, and will continue to dig into this.

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feetup
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Re: '85 fuel pump won't run

Postby feetup » Mon Oct 22, 2012 1:44 pm

There is a superb manual available in the manuals section in the title bar above. http://goldwingdocs.com/Docs/Honda%20Go ... -58A70.pdf

It is a big file, and the section on ignition seems to be partly missing but it has the full section on the fuel pump to guide you.

well worth the down load!!!

Thanks again WingAdmin!!!!

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Missourimike
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Motorcycle: 1975 GL1000
1979 GL1000
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1962 150 Dream
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1983 CX650C #2

Re: '85 fuel pump won't run

Postby Missourimike » Mon Oct 22, 2012 2:23 pm

Seems my computer's memory is quite full. Must be the wife's stuff gotten it full, as I did try to download the 1200s manual a few days ago.
But with the help of fellow Wingmates, I think I found the culprit. The black box below the handlebars found to be the sensor, must be for the air ride(?). Next to it, on the right side, appears to be a relay, round metal in a rubber boot/holder. I unplugged the thing, plugged it back together, and the darn fuel pump now has power to it! I figured the relay was toast, but maybe it was just needing some jiggling and cleaning of the spade connectors. There is a second relay, on the left of the black sensor box. Thought it might go to the horns, but it don't. The next fellow with a 1200 will bring a manual and HE will pay for it, somehow!
I always recommend to any vehicle owner, that they have a Factory Manual for their vehicle, if they don't want to pay a dealer to work on their ride. Usually, each time it's needed, it saves enough in time and trouble to pay for the book.

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virgilmobile
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Re: '85 fuel pump won't run

Postby virgilmobile » Mon Oct 22, 2012 4:11 pm

I don't remember for sure but does that bike have a bank angle sensor up front too.??It sure can kill the pump.

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Missourimike
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Re: '85 fuel pump won't run

Postby Missourimike » Mon Oct 22, 2012 5:16 pm

Don't know if this bike has a cut-off on the "angle". The drawing you posted is for one with fuel injection, so I'll just have to look and see, or better yet get a manual on the '85. I really don't want to have to dig thru all this again, having the fuel pump work only on a temp basis, meaning it's working now but as a fluke. It's a lot of bike to push down the road and up onto a trailer! Thanks.

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tom84std
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Re: '85 fuel pump won't run

Postby tom84std » Tue Oct 23, 2012 6:56 am

I've spent a quarter of a century fixing broke machines for a living. Machines with large and small gears and shafts and greasy moving widgets as well as onboard solid state circuitry and computers. Infared and laser optics and high frequency data circuits all bolted to a greasy vibrating machine. The number of problems I've found by simply wiggling connectors is huge. I've been asked many times "How'd ya fix it?" I always say "I wiggled schitt."

rdraidr
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Re: '85 fuel pump won't run

Postby rdraidr » Tue Oct 23, 2012 7:13 am

I had the same problem on an '87 Aspencade. The relays are found between the steering neck and the radiator cap. So, to the right of center.

I recall that the tilt sensor will kill the ignition to the engine, thus power to the relay that feeds your pump. If your bike is on the center stand, it should not be an issue. The sensor is supposedly filled with mercury and there have been issues with them.

Simply put, there is a 12V power and ground wire at the pump. You can trace it back to the sensor (relay) to verify the power supply.

I chose to place a jumper at the relay position to assure I had/have power to the pump when the key is on. It pressures up and then stops (by pressure) until the engine is started. The down side is the pump continues to run if the ignition is on. I've worked on a lot of vehicles and have not had a problem with this configuration. Most modern cars, when you rotate the ignition to "on" that is the first thing you will hear, is the fuel pump turning on to pressurize the system. When you work on anything fuel related, you disconect the battery (a good idea anyway). I've just eliminated one more fail-point.

Good luck




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