GSXR750 Battery draining - Suzuki GSX-R Motorcycle Forums Gixxer.com
 
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post #1 of 11 (permalink) Old 02-16-2017, 02:46 AM Thread Starter
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GSXR750 Battery draining

I'm having excessive current draw on the bike.

Current leak test
Connected the meter in-line with the negative terminal and the post, get a reading of 160mA. Battery dies overnight

When pulling fuses, the current finally drops to zero after I pull the fuse for the Fuel Pump. I check the service manual, and test the fuel pump relay located under the seat with 12v from the battery. Relay clicks and works. Test for continuity across the other 2 connectors of the relay all good.

When I pull the fuel pump relay, the circuit still shows 160mA being drawn through, so the relay doesn't seem to be part of the problem. Checking the wiring diagram, one end goes to the relay, when I pull that no current drop (does that mean there's a short in between the fuse box and the fuel pump relay?) and the other side of the circuit from the fuse box goes to the speedometer...

Last edited by Samantha750; 02-16-2017 at 06:18 AM.
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post #2 of 11 (permalink) Old 02-16-2017, 03:09 AM Thread Starter
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Re: Parasitic draw when ignition is off

I have a short somewhere on the fuel fuse circuit. What does everything run of that fuse ao i can start unplugging conectors until the drain goes away...
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post #3 of 11 (permalink) Old 02-16-2017, 03:12 AM Thread Starter
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Re: Parasitic draw when ignition is off

Starts up first time every time .. i just unplug the fuse but this is getting annoying...

any expert wiring help would be much appreciated
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post #4 of 11 (permalink) Old 02-16-2017, 04:25 AM
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Re: Parasitic draw when ignition is off

Quote:
Originally Posted by Smalo Calo View Post
When I pull the fuel pump relay, the circuit still shows 160mA being drawn through, so the relay doesn't seem to be part of the problem. Checking the wiring diagram, one end goes to the relay, when I pull that no current drop (does that mean there's a short in between the fuse box and the fuel pump relay?) and the other side of the circuit from the fuse box goes to the speedometer...
Could you rephrase that more clearly? "One end" of what goes to the relay and what to do you pull for the current draw to go away?
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post #5 of 11 (permalink) Old 02-16-2017, 04:30 AM Thread Starter
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Re: Parasitic draw when ignition is off

thankyou for the reply dpapavas
..when i pull the fuel fuse the drraw goes away .. pull the fuel relay and the draw is still there.. pull the fuel pump plug and the draw is still there.. what els is on the fuel fuse circuit that i can unplug to see if the draw goes away and locate the short?
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post #6 of 11 (permalink) Old 02-16-2017, 06:23 AM
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Re: GSXR750 Battery draining

You need a service manual/wiring diagram. Maybe irrelevant but when you changed the K7 engine into to your K9 frame, did you keep the K9 rectifier or did you replace it with the K6/7 which sits behind the radiator?

NOTE: Changed the thread title to your other thread title.
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post #7 of 11 (permalink) Old 02-16-2017, 06:27 AM Thread Starter
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Re: GSXR750 Battery draining

i used the k9 rectifier could that be the problem.. when i disconnect the rectifier the current draw is stil there
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post #8 of 11 (permalink) Old 02-16-2017, 11:52 AM Thread Starter
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Re: GSXR750 Battery draining

any pro's on this forum guys please help its my 3rd battery
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post #9 of 11 (permalink) Old 02-17-2017, 04:40 AM
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Re: Parasitic draw when ignition is off

Quote:
Originally Posted by Smalo Calo View Post
thankyou for the reply dpapavas
..when i pull the fuel fuse the drraw goes away .. pull the fuel relay and the draw is still there.. pull the fuel pump plug and the draw is still there.. what els is on the fuel fuse circuit that i can unplug to see if the draw goes away and locate the short?
According to the K6/7 wiring diagram (is this K9 wiring we're talking about?), you should try to unplug the following devices: fan relay, ECU, fuel pump relay, all four ignition coils and the ignition key-lock switch. Do them one connector at a time of course and see what happens. If the drain goes away when the ECU is disconnected, the problem might be not with the ECU itself, but with devices driven by it, such as the fuel injectors, so some more troubleshooting will be necessary.
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post #10 of 11 (permalink) Old 02-17-2017, 05:28 AM Thread Starter
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Re: GSXR750 Battery draining

GiveThanks to the Gixxer Yoda's ....

BATTERY CURRENT LEAKAGE
Remove the front seat. (8-7)
Turn the ignition switch to the OFF position.
Disconnect the battery - lead wire.
Measure the current between - battery terminal and the -
battery lead wire using the multi-circuit tester. If the reading
exceeds the specified value, leakage is evident.
-09900-25008: Multi-circuit tester set
-Battery current (leak): Under 3 mA
-Tester knob indication: Current (, 20 mA)

I wil try what you have suggested. i recently unpluged the black plug of the ecu and the draw goes away. so maybe i have a faulty ecu .. i have non coded k7 wiring harness with a 02H00 ECU that has been flashed to US spec 02H10 so could this just be the ecu that shorts out..?
next i wil disconnect all four ignition coils and 8 injectors one by one and post what happens.
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post #11 of 11 (permalink) Old 02-22-2017, 07:16 AM
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Re: GSXR750 Battery draining

Since you pulled the relay with no affect, just leave it. But, unplug everything down stream from the relay. If you follow the diagram, the power goes to the coils, the PAIR solenoid, the ECU, and cooling fan relay.

If you still have a leak it's going to get hard to find. If you unplug the right switch pod, it could be the pod, or any wiring downstream from it. Also the kickstand relay is between the fuse box and switch pod. All the stuff I listed first is really easy to troubleshoot. The pod and kickstand relay, not so much. Let us know what you find.


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