Fuel (pump,sender, etc.) wiring question, confirmation?
Thread Starter
Launching!
Joined: Dec 2001
Posts: 259
Likes: 1
From: Durham, NC
Fuel (pump,sender, etc.) wiring question, confirmation? I had tacked a question onto another post (tryna keep related info together) here:
https://ls1tech.com/ubb/cgi-bin/ulti...255;p=1#000003
Don't mean to be a pest, but I'm hoping to get some feedback on this before I screw something up. I've decided that circuit 465, grn/wht, pin D on C101 has to be the fuel pump relay. But does anybody have any info or comments on connector C230 and the fuel system wiring?
Thanks.
https://ls1tech.com/ubb/cgi-bin/ulti...255;p=1#000003
Don't mean to be a pest, but I'm hoping to get some feedback on this before I screw something up. I've decided that circuit 465, grn/wht, pin D on C101 has to be the fuel pump relay. But does anybody have any info or comments on connector C230 and the fuel system wiring?
Thanks.
TECH Apprentice
Joined: Jun 2002
Posts: 319
Likes: 0
From: NH
Re: Fuel (pump,sender, etc.) wiring question, confirmation? I am just getting around to wiring. I temporarily wired some stuff last night. I got the motor to turn over. That was my goal.
C101 from the PCM harness should be just plugged into the mating end of the engine harness (the one with the two fuse blocks on it). As for C230, the fuel pressure signal is an input to the PCM. I am not using any of this wiring because I do not have the stock tank setup. That circuit also has a 5 volt output (feed) from the PCM going to the fuel system which I am using to supply 5 volts to my Vats bypass circuit, also using the fuel ground pin from that circuit. So, if you do not have the original tank then you can just leave those wires unconnected. In order to get the motor to crank you will need to take the yel/blk wire from C230 to a ground. This will jump starter relay which is part of the anti theft stuff (a function normally handled by the BCM). This will allow the starter relay to turn over the motor. As for the fuel pump relay, I have not gotten that far. But this should be fairly simple. I plan on using the orignal engine harness and the fuel pump relay in the fuse block along with the original wiring. When, I take a look at that (maybe tonight) I will let you know. If you are trying to accomplish this without the helms manuals then you are out of your mind.
C101 from the PCM harness should be just plugged into the mating end of the engine harness (the one with the two fuse blocks on it). As for C230, the fuel pressure signal is an input to the PCM. I am not using any of this wiring because I do not have the stock tank setup. That circuit also has a 5 volt output (feed) from the PCM going to the fuel system which I am using to supply 5 volts to my Vats bypass circuit, also using the fuel ground pin from that circuit. So, if you do not have the original tank then you can just leave those wires unconnected. In order to get the motor to crank you will need to take the yel/blk wire from C230 to a ground. This will jump starter relay which is part of the anti theft stuff (a function normally handled by the BCM). This will allow the starter relay to turn over the motor. As for the fuel pump relay, I have not gotten that far. But this should be fairly simple. I plan on using the orignal engine harness and the fuel pump relay in the fuse block along with the original wiring. When, I take a look at that (maybe tonight) I will let you know. If you are trying to accomplish this without the helms manuals then you are out of your mind.
Thread Starter
Launching!
Joined: Dec 2001
Posts: 259
Likes: 1
From: Durham, NC
Re: Fuel (pump,sender, etc.) wiring question, confirmation? I have a factory service manual with a million separate diagrams.
I have a stock FBody engine harness, but I do not have the mating harness - the car harness. So I have the Male C101, C230, C220, etc. I don't need BCM since my PCM was reprogrammed to remove VATS.
I do need to wire up all the fuel related stuff to the stock tank that I have. And that's where my confusion comes from. I'm not sure what happens between for instance, the Fuel level sender, the PCM and the guage. I could presume that the wire from the sender splits off and goes to both, but I'm not entirely sure.
I have a stock FBody engine harness, but I do not have the mating harness - the car harness. So I have the Male C101, C230, C220, etc. I don't need BCM since my PCM was reprogrammed to remove VATS.
I do need to wire up all the fuel related stuff to the stock tank that I have. And that's where my confusion comes from. I'm not sure what happens between for instance, the Fuel level sender, the PCM and the guage. I could presume that the wire from the sender splits off and goes to both, but I'm not entirely sure.
TECH Apprentice
Joined: Jun 2002
Posts: 319
Likes: 0
From: NH
Re: Fuel (pump,sender, etc.) wiring question, confirmation? If you didn't already find it. The wiring for the fuel unit is on page 6-1335. I do not have it with me so I can't explain exactly how it works. If you want I can take a longer look tonight.
