 
     |
| New Fuel Pump not working at all (Page 3/5) |
|
TheDuke
|
APR 08, 09:17 PM
|
|
|
???? what do you mean? it reads 12v at the fuse but only 8.5 at the back firewall, would it not fix it if i ran a new wire? I must not understand what you meant.
|
|
|
|
Gall757
|
APR 08, 09:45 PM
|
|
|
Where are you reading 8.5 volts? It should be at the connector next to the ECU...not at the relay. You can do what you suggest and it will probably work, but if you want to keep the wiring stock, test for 12 v. on the connector pin.
|
|
|
|
TheDuke
|
APR 08, 09:55 PM
|
|
|
on the inside of the car right next to the ecu before the connector going thru the firewall i put a tiny slice in the jacket of the wire just big enough to get the tip of the tester in, it reads 8.5v
|
|
|
|
Gall757
|
APR 09, 09:26 AM
|
|
Okay....if you test the same wire at the fuse box using that same method and get 12 volts, you found your problem. I would splice in a new wire at those 2 points. It seems the connector is not a factor.
We need some comments from wiring pros.
|
|
|
|
TheDuke
|
APR 09, 10:05 AM
|
|
|
OK, I've talked to a couple of dealerships and got them to talk to me a about a car they cant pull up on their tablet, that took some work. What I've come up with after talking to them is that I should run a new wire from the fuse panel to the firewall and splice in the fuel pump power as well as the sending unit power into the new wire I run and that should fix the problem. Does anyone see any potential problem with that fix?
|
|
|
|
fierosound
|
APR 09, 03:38 PM
|
|
| quote | Originally posted by TheDuke:
OK, I've talked to a couple of dealerships and got them to talk to me a about a car they cant pull up on their tablet, that took some work. What I've come up with after talking to them is that I should run a new wire from the fuse panel to the firewall and splice in the fuel pump power as well as the sending unit power into the new wire I run and that should fix the problem. Does anyone see any potential problem with that fix? |
|
They're saying the main power wire has a fault?
|
|
|
|
TheDuke
|
APR 09, 03:50 PM
|
|
|
while i appreciate that you have sent that a few times, i dont think it goes to my car, it does not represent the same color wires that are in my car
|
|
|
|
Gall757
|
APR 09, 04:18 PM
|
|
| quote | Originally posted by TheDuke:
while i appreciate that you have sent that a few times, i dont think it goes to my car, it does not represent the same color wires that are in my car |
|
This is very basic information that needs to be resolved before anything gets fixed. What colors are you seeing? The diagram has proven to be correct for 40 years.
Multiple threads on the same issue will confuse everyone, especially you.[This message has been edited by Gall757 (edited 04-09-2020).]
|
|
|
|
TheDuke
|
APR 09, 04:32 PM
|
|
coming off of the fuel pump there is a black, tan with white stripe, and a pink. the black is ground the pink i have traced up to the instrument panel and at both ends of the pink im reading 8.5v the tan is not even reading 1v
nowhere on the diagram can i find a pink wire to the fuel pump
at this point i have stripped off the tape for the main wiring harness behind the dash trying to trace the wires from the fuse panel to the pump
the orange wire from the fuse panel goes to a connector next to the ecu and changes to an orange with black stripe and goes to the fuel pump relay, up to the relay i have 12v so far so good
im going to try to trace the tan wire off the fuel pump now to see where that goes
|
|
|
|
Gall757
|
APR 09, 04:38 PM
|
|
| quote | Originally posted by TheDuke:
im going to try to trace the tan wire off the fuel pump now to see where that goes |
|
The diagram above shows you where the tan/white wire goes. One of the places is the ALDL connector in the armrest. Is that in good shape? The other places are the oil pressure switch and the relay. You could disconnect the oil pressure switch to test if it is bad.[This message has been edited by Gall757 (edited 04-09-2020).]
|
|
|
