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dodge b100 fuel sender wire routing?? #732200
January 23rd 2018 10:18 am
January 23rd 2018 10:18 am
Joined: Dec 2017
Posts: 88
nebraska
J
jason159 Offline OP
journeyman
jason159  Offline OP
journeyman
J
Joined: Dec 2017
Posts: 88
nebraska
Hey guys, I can not figure out where the fuel sender lead (1 wire) routes through the van body/frame, to the fuel sender. Inside of the van in the right rear corner is the wire harness and sender connector, but I can't figure out how the wire routes from inside the van, through the frame, to the exterior fuel sender unit beneath the rear bumper. Hoping a Dodge guy can explain how to route the wire or perhaps provide a pic? The service manual does not give detailed info. I really appreciate the help! I need a working fuel gauge! lol. thanks-Jason


1975 Dodge B100 shorty. 318, 3/tree
Re: dodge b100 fuel sender wire routing?? [Re: jason159] #732204
January 23rd 2018 11:07 am
January 23rd 2018 11:07 am
Joined: Aug 2001
Posts: 11,783
Fircrest, WA
Reed Offline
Maniac
Reed  Offline
Maniac
Joined: Aug 2001
Posts: 11,783
Fircrest, WA
The fuel sending unit is on the top of the gas tank roughlyin the middle, so if you need to access the sending unit you have to pull the tank (or cut a hole in the floor. I had a Dodge van once where a previous owner did that).


Windows- they're what make a van worth owning!
Re: dodge b100 fuel sender wire routing?? [Re: jason159] #732212
January 23rd 2018 1:39 pm
January 23rd 2018 1:39 pm
Joined: Jan 2018
Posts: 65
Vansfield, USA
Sparkynm Online content
journeyman
Sparkynm  Online Content
journeyman
Joined: Jan 2018
Posts: 65
Vansfield, USA
I think the wires run inside. What year van? On my '72 model, the wire runs with the taillight harness, up thru the a-pillar on the drivers side, along the roof, across the rear doors and down thru a grommet in the floor. It's hard to find if you have any trim inside. Hope this helps.

Re: dodge b100 fuel sender wire routing?? [Re: Sparkynm] #732223
January 23rd 2018 5:29 pm
January 23rd 2018 5:29 pm
Joined: Dec 2017
Posts: 88
nebraska
J
jason159 Offline OP
journeyman
jason159  Offline OP
journeyman
J
Joined: Dec 2017
Posts: 88
nebraska
1975 B100. I understand the tail-light harness part as yes, it runs up high along driver side then routes above the rear door and down to each set of tail lights. The fuel sender lead connection (light blue if I'm not mistaken) is dangling among this group of wires in pass sider rear corner. My question is, I cant see where the wire needs to shimmy through the inside of the van/frame to match the external fuel sender connection on my fuel tank. I have zero trim or carpet or anything inside my van. There has to be an access hole but this is what I'm struggling to find, lol. Sorry for the lengthy text. I'll def keep investigating, was hoping somebody could say, "see that small hole .....it feeds through it" haha, but thanks guys!


1975 Dodge B100 shorty. 318, 3/tree
Re: dodge b100 fuel sender wire routing?? [Re: jason159] #732242
January 23rd 2018 8:54 pm
January 23rd 2018 8:54 pm
Joined: Jan 2018
Posts: 65
Vansfield, USA
Sparkynm Online content
journeyman
Sparkynm  Online Content
journeyman
Joined: Jan 2018
Posts: 65
Vansfield, USA
Here are a couple of pics. Although there is the trailer wires, the grommet looks factory, Have my corner trim in now but I think the hole is right behind the welded door frame and corner panel seam. Maybe there is some seam sealer partially covering hole. Think it was tough to see that's why the old harness is still there. Hope these help, maybe could get better in the daylight.

Attached Files P1010367.JPGP1010368.JPG
Re: dodge b100 fuel sender wire routing?? [Re: Sparkynm] #732250
January 23rd 2018 10:37 pm
January 23rd 2018 10:37 pm
Joined: Dec 2017
Posts: 88
nebraska
J
jason159 Offline OP
journeyman
jason159  Offline OP
journeyman
J
Joined: Dec 2017
Posts: 88
nebraska
Originally Posted by Sparkynm
Here are a couple of pics. Although there is the trailer wires, the grommet looks factory, Have my corner trim in now but I think the hole is right behind the welded door frame and corner panel seam. Maybe there is some seam sealer partially covering hole. Think it was tough to see that's why the old harness is still there. Hope these help, maybe could get better in the daylight.

ah yes, wonderful, this is what I'm talking about, lol. Although it's tough to reference the exact spot underneath the van, perhaps a pic or 2 from a bit farther back but man, I really appreciate the help, I'll crawl under the van tomorrow and try and figure it out. Thanks!!!

Also in pic 1, is that the pass side leaf spring shackle on the far right side of the pic? just trying to get the frame reference correct smile

Last edited by jason159; January 23rd 2018 10:40 pm.

1975 Dodge B100 shorty. 318, 3/tree
Re: dodge b100 fuel sender wire routing?? [Re: jason159] #732252
January 23rd 2018 11:25 pm
January 23rd 2018 11:25 pm
Joined: Jan 2018
Posts: 65
Vansfield, USA
Sparkynm Online content
journeyman
Sparkynm  Online Content
journeyman
Joined: Jan 2018
Posts: 65
Vansfield, USA
Yep, pic#1 is the pass. side rear. That is the bumper bracket lower left of pic. The hole is on floor board about 1/2" from rear panel above and almost behind shackle mount.
It is in kind of a triangle notch of mount. Don't think I can get a better picture, but if you can't find it, I'll try again. Good luck

Re: dodge b100 fuel sender wire routing?? [Re: Sparkynm] #732310
January 25th 2018 1:43 pm
January 25th 2018 1:43 pm
Joined: Dec 2017
Posts: 88
nebraska
J
jason159 Offline OP
journeyman
jason159  Offline OP
journeyman
J
Joined: Dec 2017
Posts: 88
nebraska
Originally Posted by Sparkynm
Yep, pic#1 is the pass. side rear. That is the bumper bracket lower left of pic. The hole is on floor board about 1/2" from rear panel above and almost behind shackle mount.
It is in kind of a triangle notch of mount. Don't think I can get a better picture, but if you can't find it, I'll try again. Good luck

I understand but have yet to investigate, was busy putting in new coil springs but again, thank you so much for the help, really appreciate it!!


1975 Dodge B100 shorty. 318, 3/tree
Re: dodge b100 fuel sender wire routing?? [Re: jason159] #732335
January 25th 2018 8:50 pm
January 25th 2018 8:50 pm
Joined: Jan 2018
Posts: 65
Vansfield, USA
Sparkynm Online content
journeyman
Sparkynm  Online Content
journeyman
Joined: Jan 2018
Posts: 65
Vansfield, USA
What springs did you use? Are you doing the whole front end also? Asking 'cause that's the next big one here. Also researching gear boxes.

Re: dodge b100 fuel sender wire routing?? [Re: Sparkynm] #732381
January 27th 2018 11:00 am
January 27th 2018 11:00 am
Joined: Dec 2017
Posts: 88
nebraska
J
jason159 Offline OP
journeyman
jason159  Offline OP
journeyman
J
Joined: Dec 2017
Posts: 88
nebraska
I bought Moog coil springs, I'm replacing them plus the rotors, calipers and pads, and shocks, as well as the rubber brake hoses. The ball joints seem OK at this time. This is a 40 year old van that's been sitting since 2002 and I want it road worthy, lol. I've never replaced coil springs until now, and it's not hard. I'm not using a spring compressor either. Youtube has several vids how to do it. The Moog springs are shorter, but thicker providing original ride-height, I was told by Moog. So they're very east to put back together because of the fact they are shorter. I've not had to look at gearbox's, hopefully I won't have to smile


1975 Dodge B100 shorty. 318, 3/tree
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