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I've searched online, and in the wiring diagram that I have, but can only find wiring diagrams for the fuel pump fuse and relay circuit... nothing for the actual harness pinout.
My car died this week... no fuel pressure. Just got it towed home and popped off the drivers side rear wheel. I had already checked out the fuse and relay in the engine compartment, so my plan was to check the voltage at the pump... then I found the following:
So at least I most likely don't need a fuel pump (the fuel pump connector cleaned up okay, once I removed the part that was stuck in it from the wiring harness). So I just want to know the pinout so I can use a bench top power supply to check that the pump is still functioning.
Also, if anyone knows the part number or know where I can get a replacement harness connector that would be appreciated. I plan to solder and shrink tube the new connector on.
Last edited by Lou99Vette; 06-27-2015 at 01:08 PM.
Replaced the connector, but it's still not starting (there is 12V at the connector while the ignition is on, for a short period of time, like it's supposed to). I think the contacts on the pump end aren't making good contact, since there was corrosion in the whole connector. It's impossible to fit sandpaper in there.
Searching on the net I found a couple methods for cleaning the contacts in similar connectors. One guy said he uses a tiny drill bit, and wrap steel wool around the tip like a Q-Tip. Others said to use baking soda.
Anyone have any other tricks for getting in such tight places?
Last edited by Lou99Vette; 06-30-2015 at 06:44 PM.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Originally Posted by Lou99Vette
Replaced the connector, but it's still not starting (there is 12V at the connector while the ignition is on, for a short period of time, like it's supposed to). I think the contacts on the pump end aren't making good contact, since there was corrosion in the whole connector. It's impossible to fit sandpaper in there.
Searching on the net I found a couple methods for cleaning the contacts in similar connectors. One guy said he uses a tiny drill bit, and wrap steel wool around the tip like a Q-Tip. Others said to use baking soda.
Anyone have any other tricks for getting in such tight places?
Have you checked the FP ground located on the frame stud nearby? No ground, no pump.
Have you checked the FP ground located on the frame stud nearby? No ground, no pump.
The ground in the harness (the part I just replaced) works fine; if that is connected to the same ground your referring to.
My guess is either the ground on the other connector end (pump) is either corroded and not making contact, or it isn't electrically connected to the pump anymore. When I was testing the pump with a bench power supply, I couldn't get it to go until I moved my ground point from the pump connector ground to the chassis of the pump. I just attributed that to not being able to make a good contact with the pin.
I took the 2nd half of the day off from work to figure it out. Hopefully it just needs to be cleaned better.
I used a tool for removing the pins in computer molex connectors. And packed one end with steel wool. Inserted it over each pin, and then spun it to clean up the contact:
I also used some coke (soda) on it for a bit... not sure if it helped or not, but it's a mild acid and will supposedly clean up oxidation.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Originally Posted by Lou99Vette
Fixed it
I used a tool for removing the pins in computer molex connectors. And packed one end with steel wool. Inserted it over each pin, and then spun it to clean up the contact:
I also used some coke (soda) on it for a bit... not sure if it helped or not, but it's a mild acid and will supposedly clean up oxidation.
Excellent idea on the pin removal tool. The hollow tube looks like "just what the Dr ordered".
06-27-2015, 11:33 AM
Need fuel pump harness pinout
