Calling All Fuel Pump Gurus
#21
Ok, many cars have what's called a "bulkhead connector" on the front firewall. It's the major removable plug that connects the wiring harness under the hood to the fuse box inside the car. Now that we know what a bulkhead and connector is on a car, let's move to the back. If you look under the car, above the muffler, you will see a vertical "wall" where beyond that is the inside of the car. There is an electrical connecter to the fuel pump up there, check it.
#23
Without being there, I don't know which prong goes to which wire. Looking at the harness, what color wire do those prongs correspond to?
And, when you were testing, you did have power jumped to the fuel pump prime connector under the hood?
And, when you were testing, you did have power jumped to the fuel pump prime connector under the hood?
#24
No I had the key in the on position so it should have been getting power. The one with no power is the prong that belongs to the gray wire. The purple seems to get power and I used the spring that goes to the ground as the ground so I know black and purple work but not gray. No I didn't try the prime connector while while testing the gray wire
#25
You need to test it again. The gray wire will only have power to it during the initial few second prime cycle, then power shuts off.
The pump doesn't get powered up again till you crank the engine over to start, and after the engine is running.
The pump doesn't get powered up again till you crank the engine over to start, and after the engine is running.
#27
Tried it and you are correct the grey does light up so it is getting power from the prime connection. So then it has to be the pump since it didn't prime or could be the wires. Anyway for me to test those wires? Is there a way to take the connector off the top of the fuel pump to test if the power is making it all the way through?
#28
Ok good, at least the problem is isolated between the plug and pump. When you changed the pump, did you drop the tank or do the hatch method?
You can probe through the casing of the wire (that's why the tip of your test light has a point) close to the sending unit to test if you may have a broken wire.
If it tests good there, you have a problem with the pump connection inside the tank, or with the pump itself.
You can probe through the casing of the wire (that's why the tip of your test light has a point) close to the sending unit to test if you may have a broken wire.
If it tests good there, you have a problem with the pump connection inside the tank, or with the pump itself.