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Fuel pump relay location


Old 04-13-2010, 08:49 PM
MongoDV8 is offline
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Join Date: Dec 2007
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Default Fuel pump relay location

Posting for a friend of mine. He has a 2003 2500 4x4 diesel. He gets a code P0629. Can't find the fuel pump relay. Any advice ?
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Old 04-14-2010, 10:25 PM
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pizzo is offline
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Join Date: Aug 2009
Location: Chicago
Posts: 876

P0629 Fuel Pump Relay Circuit High, or Fuel Lift Pump Control Circuit High
Its mounted in the PDB on the drivers side fender under the hood

Is the lift pump working? does the truck Run? 2003 is a CP3 pump truck so its a common rail it will draw its own Fuel if the lift pump is not pumping then it may be bad... You'll have to check that out.. Turn key bump starter don't start
should hear a humming sound at the drivers side front inner wheel well... if not on the Check the wiring to the fuel pump the pump is mounted on the Fuel filter housing next to the engine on the drivers side. its the power plug mounted to the back side of the filter housing... Hope that helps
When my lift pump failed I got a Fass 150 the best thing I bought for my truck so FAR other then Gauges
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