P1000 Fuel Pump not turning on...even after replacing it with a brand new one.

[rjanzen]

i was driving my 2018 1000-5 LE in the snow last week and out of the blue it just shuts off. I lifted the seat and couldn't hear the fuel pump so i assumed the pump just died (tank was full of fresh fuel). After getting it towed home, i ordered a brand new fuel pump and put it in but still nothing. I also tried a brand new battery just in case. I checked all the fuses (which were good) and swapped the fuel pump relay with one of the other functional relays (low beams) and that didn't do anything. The whole time I did a voltage test at the pump (between the green and brown wires) per the service manual and i never got any voltage so i'm assuming there's a break in the wire somewhere or something is up with the computer/PCM. I don't want to start pulling wires so i've got three questions for y'all
1. do you think my assessment of the situation is correct or am i missing something?
2. could i run wires directly from the fuel pump relay to the pump to see if it really is a wire issue. If that's the culprit i'm fine with pulling wire harnesses apart and rewire it.
3. Or any other suggestions?

at this point, i'm happy to take it to the shop but my local honda dealer said the soonest i can drop it off is almost 4 weeks out. I just got tracks on this thing this winter and the snow is epic right now and i want to get it back out there!

any and all suggestions are greatly appreciated! here's the beast.

 

[Hondasxs]

At the fuse box, the 15A FAN Brown wire is for the fuel pump.
Check for voltage on both side of this fuse with key-on.
This is a power check AFTER the relay.
Apply 12v to the brown wires at this fuse.
There should be 2 browns on one side and a red/yellow on the other side of the fuse.
Does the fuel pump prime?

 

[Hondasxs]

Update.. let me re-check something and re-word it.

 

[rjanzen]

At the fuse box, the 15A FAN fuse controls this after the relay.
Check for voltage on both side of this fuse with key-on.
This is a power check AFTER the relay.
Apply 12v to the brown wires at this fuse.
There should be 2 browns on one side and a red/yellow on the other side of the fuse.
Does the fuel pump prime?

thx for the info. i checked all the fuses and they all look good. i double check them tonight. and no, it does not prime. i've tried a new pump as well with the same results

 

[rjanzen]

also, it cranks just fine.

 

[Hondasxs]

Apply 12v to the brown wire and the pump should come on.
There are a few spots you can do this.
- At the pump.
- At the relay.
- at the 15A FAN fuse.

Another check,
Check for 12v at the relay on the Red/Blue wire. Key-on.
AND the Black/Red wire.
And check the ground on the Gray/red wire.

 

[rjanzen]

yup, will check those tonight as well. thx!

 

[Mark in Northern Iowa]

Nice looking ride! 👍 👍
.
I see @Hondasxs has you well in hand.
Glad you already have an account over here.
I was about to run out of ideas at the the other place. haha!!
.
Have a good day

 

[HondaTech]

Let me look at the wiring diagram,if you dont figure it out before then.

 

[rjanzen]

thanks HondaTech! I've been digging through the service manual a lot since i've posted last night and the wiring is starting to make a bit more sense to me. As soon as i have an update i'll make sure to post it here. thx

 

[HondaTech]

thanks HondaTech! I've been digging through the service manual a lot since i've posted last night and the wiring is starting to make a bit more sense to me. As soon as i have an update i'll make sure to post it here. thx

Tbh, sometimes the way they wire stuff doesn't make sense to me either.

 

[rjanzen]

just wanted to follow up with this post. Turns out i had one of the 1-2 codes where the fuel injector wire/plug stopped working and that's why my fuel pump stopped working. Once i bought the replacement wire/plug and swapped out both the front and rear injector everything started working again.