fuel pump wiring bypass - Defender Source
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  #1  
Old October 17th, 2012, 11:25 PM
ember
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ember bane
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fuel pump wiring bypass

I'm not getting power to my '97 D-90 fuel pump, Would it hurt the pump/fuel system if I run a power wire from the ignition switch? I know that when the key is turned to position 2 that the fuel pump is supposed to pump a few seconds and then turn off, Just wondering if the pump doesn't cut off it it would hurt anything.
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  #2  
Old October 17th, 2012, 11:34 PM
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Brett Fritzler
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Why not figure out why there's no power at the harness plug instead?
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Old October 17th, 2012, 11:48 PM
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Chris Snell
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Start at the fuel pump and work you way forward on the harness. Probably a bad ground.
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  #4  
Old October 18th, 2012, 01:10 AM
ember
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ember bane
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thanks for the advise guys, unfortunately I can't seem to be able to find a wiring schematic for the 1997 model year. I have a shop manual for the earlier years, but can't find one for this one. I have power going as far as the inertia switch, but then the wire goes through the firewall and I have no idea where it goes next. There is no power at the fuel pump relay or going to the pump.
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Old October 18th, 2012, 07:57 AM
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Joshua
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You've ruled out ignition switch problems? ipgregory seems to post the wiring info for 1997 every few weeks if you try some search terms. I also post this every few weeks. Save it as a favorite on your computer and phone.

http://lhsw.com/d90/
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  #6  
Old October 18th, 2012, 08:16 AM
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A lot of people have had problems with the connections and the grounds. If those checked out then the switch and the relay are the next step. I am pretty sure that you have two power leads going into the relay, one hot and one switched. Do you have power to both of these?
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  #7  
Old October 18th, 2012, 08:21 AM
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Have you replaced the relay yet?
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