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messydeer
Joined: 13 Feb 2006
Posts: 214
Location: Bellingham, WA
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 Posted: Wed Oct 05, 2011 6:53 pm Post subject: UMA fuel pressure sender wiring |
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Hello!
I just got a UMA N1EU07G fuel pressure sender. I am mounting this on the firewall, about 6" away from the MGL RDAC (where the signal wires from all the FWF probes connect) and about 18" away from the firewall ground. I will split off the power wire at ~6" from the sender, leaving the other two wires and braid (if needed) to run until they are 16" away from the sender. At that point, the signal wire will separate from the ground and shield and connect to the RDAC. The ground and shield would go the final 2" to the firewall ground.
The easiest thing for me to do is to remove the insulated cover over the braid (and 3 wires) to the point where the power wire needs to separate. I imagine the braid will be a bit tight around the wires, so I could cut it off at the point where the power wire separates and splice a separate ground wire to it. Or does it need to shield the signal wire for that extra 10"?
Lemme know how this sounds to you.
Cheers,
Dan
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jay(at)horriblehyde.com
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| Posted: Thu Oct 06, 2011 12:30 am Post subject: UMA fuel pressure sender wiring |
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Hello Dan,
Why do you need to bring the power wire out so soon- I imagine that it is to
be able to connect to your positive bus? I don't think that that should be
a problem, however, instead of cutting the braid try this method. Hold the
braid tightly around the cores just behind (towards the sensor) where you
want to bring the wire out, say in your left hand. Lightly grasp the shield
about 1 inch to the right with your right hand and slide the braid to the
left like a sock. The braid should 'balloon' up between your fingers. Now
take a sharp pencil and use the tip to work open one of the holes formed
between the braiding. Work it open enough to be able to get the tip in
under the wire that must come out. Now pull a loop of the wire out through
the hole in the braid and then pull the whole wire out of the braid. Once
its out pull the ballooned part of braid flat along the remaining wires.
Voila! Now you have the wire out and no damage to the braid.
Jay
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messydeer
Joined: 13 Feb 2006
Posts: 214
Location: Bellingham, WA
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| Posted: Thu Oct 06, 2011 6:53 am Post subject: Re: UMA fuel pressure sender wiring |
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Thanks, Jay 
Yes, I'm taking out the power wire to splice it to a rather short power supply wire. But I still could have left it in for a bit longer, now that I look at the finished product shown below.
I thought the braid might be too tight to get the wires out, but it worked just fine. I removed the original white plastic covering to an inch before the power lead takeoff and kept the other two wires in the braid. Used heat shrink to cover the exposed braid and did the same thing where the signal wire comes out. The last few inches has just the ground wire inside the braid. I stripped the ground wire back 1/4" so it would contact the braid, then stuffed them both into the faston terminal and crimped away.
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