Question about BMW Cars & Trucks
REPLACED THE TWO BLUE AND THE GREEN RELAY UNDER THE HOOD. THEY SEEM TO CONTROL OTHER THINGS HAVING TO DO WITH THE ENGINE.
Need made model and year.
Also did you run into anything or it just stopped?
Didi you look at the fuses in the fuse box?
Some cars have one in engine bay and one in the drivers side dash?
Posted on May 02, 2017
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Posted on Jan 02, 2017
SOURCE: no power to fuel pump relay
check the realy under the shifter knob..see if all 4 plugs are plugged in.. if not check you EFI fuse(its near the the battery fuse box)..if the fuse is fine then it might be ur ecu
Posted on Feb 09, 2009
SOURCE: 2000 S10 4.3L
At the fuel pump relay you should have 1 full time hot wire. 1 hot wire when you turn on the switch. 1 ground, and the other wire goes to the pump. Test the ground to be sure it is good. If so then jump a hot to the one that goes to the pump and see if it runs.If it does then you have a bad relay or ECM. You can swap the relay with another of the same # from tour fuse box to test it.There is also a ground on top of the frame near the filler neck, check it too. Good Luck
Posted on May 06, 2009
SOURCE: No fuel or power to fuel pump.
If the relay is not getting ground signal to turn on then it sounds like a problem with the ECU this is fed from there. Commonly dry solder joints inside the ECU can cause this problem, they have a tendency to crack around the transistors and heavier load components and also components that are subject to mechanical vibration. He said that the fuel pump relay is located in the kick panel and the ECU is next to this. Id take out the ECU and remove the main circuit board and examine for dry solder joints. If you don't know what they look like its somthing like this http://www.tegger.com/hondafaq/mainrelayoperation/dry-joint_small.jpg
Hope this helps
Posted on May 08, 2009
SOURCE: 2000 S10 4.3L
Did you verify that the relay terminals have the appropriate signals to them?
ECM fuse B (20-amp) should provide power at all times to the orange wire of the fuel pump relay. The relay coil receives ground via the black wire, and relay coil gets power from the dark green/white wire. When the relay is closed, you should have battery power on the gray wire.
The relay trigger wire should have power from the dark green/white wire in terminal 1 of the Vehicle Control Module (VCM) connector for the first couple of seconds after they key is turned to run (to prime the system) and when the truck is running. Checking for all the appropriate signals at the relay is where I would start. That is after I checked for diagnostic codes.
Believe the fuel relay is the middle relay out of the three in the left rear of the glove box. Last thing is to hot wire the fuel pump if you can not get it scanned, see if the pump is bad unless your going to have a shop work on changing the fuel pump.
Good luck and hope this helps. keep me posted.
Posted on May 12, 2009
hi tony, i had that same problem come through my shop! i eventualy (hours) found the burnt wire in its clear plastic connector in trunk, above backseat headrest. (top and back of trunk). i hope this helps, so you dont have to do what i did...LOL good luck, marty
Posted on May 27, 2009
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