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Fuel Pump RELAY? HELP!
Note: 1984 GL1200 Interstate

I tested my new (used) fuel pump using the jumper wire technique and it is working. When I plugged the wires back into the relay(?) and turned the ignition (without the engine running) on I get nothing, no noise from the pump or anything. Is this normal and I assume why we test with the jumper wire? Will I just not know if that relay is a problem until I start her up and see if it keeps running? The Haynes manual didn't really say anything beyond this jumper test in reference to the relay.

Also, I hooked up the "broken" fuel pump and performed the jumper wire test again and after shaking it a little in my hand the pump started again? I won't trust it, but I guess it might be a good idea to tote the old one along on trips as a backup just in case.
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#1 08-23-2008, 07:34 AM,
fuel pump relay


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The only stupid questions are the one's that are not asked.

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#2 08-23-2008, 02:38 PM,
The relay will not trigger the pump unless the motor is turning over. I don't know exactly what triggers it, but you should be able to turn the motor with the starter and feel the fuel pump clicking.
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#3 08-25-2008, 10:22 AM,
To see if the fuel pump runs try this:

Put the bike on the centerstand.
Shift the bike into gear.
Turn the key on and with the clutch lever out, (Clutch engaged), push the start button.
The engine won't turn over but the fuel pump should run.

If it doesn't run use a test light and probe the wires and see if you've got voltage going to it.

Good luck!!
1985 Limited Edition
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#4 08-25-2008, 09:34 PM,
Welcome to the Site wingrider84!!!
1985 Limited Edition
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#5 08-25-2008, 09:36 PM,
The trig unit supplies the ground for the fuel pump relay. The engine must at least be cranking (ign switch on) for the fule pump to work.
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#6 08-26-2008, 05:24 PM,
roscoepc Wrote:To see if the fuel pump runs try this:

Put the bike on the centerstand.
Shift the bike into gear.
Turn the key on and with the clutch lever out, (Clutch engaged), push the start button.
The engine won't turn over but the fuel pump should run.

If it doesn't run use a test light and probe the wires and see if you've got voltage going to it.

Good luck!!

I was having the same problem so I hot wired direct to the battery through a switch which I turn on before I hit the starter. The bike has been running fine with this configuration. I couldn't get the fuel pump to work going through the relay so I used this remedy. Do you see anything wrong with this or could I be creating a problem up the road?
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#7 09-06-2008, 09:36 PM,
Im4poor Wrote:I was having the same problem so I hot wired direct to the battery through a switch which I turn on before I hit the starter. The bike has been running fine with this configuration. I couldn't get the fuel pump to work going through the relay so I used this remedy. Do you see anything wrong with this or could I be creating a problem up the road?

Yes there's a couple of things wrong with running the bike like this and Safety is the most important!! If you have to hit the kill switch in an emergency, (laying the bike down!!), the fuel pump will continue running and you might be in Deep Doo-Doo!!!!!! Confusedhock: :mrgreen:

You really need to find out why the relay is not energizing, whether it's a bad relay or bad fuse or a break in the wire from the fuse to the relay.
1985 Limited Edition
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#8 09-06-2008, 10:34 PM,
glhonda Wrote:The trig unit supplies the ground for the fuel pump relay. The engine must at least be cranking (ign switch on) for the fule pump to work.

As the carburated version differs from the fuel injected model,,,,,,,, I stand corrected!!!!!!!!!!! :mrgreen:
1985 Limited Edition
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#9 09-06-2008, 10:36 PM,


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