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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: robdiaz44 on July 24, 2016, 11:02:13 PM

Title: The Dreaded Under-The-Tank 4 Pin Connector (85 K100rs)
Post by: robdiaz44 on July 24, 2016, 11:02:13 PM

I have heard that you can replace the 4 pin connector with a trailer connector. Not sure if this can be done on the old (pre 05/85) under the fuel tank connector. I've been scouring the forum to find out, but can't seem find anything. Looking for some input here...thanks in advance.

Here are pictures of: 1) the old female connector that I have since replaced with the "spare" connector that was in the relay box...the 2 "fried" connectors are the pos and neg to the fuel pump; and 2) the male part of the connector...my concern is that the 2 darker connectors (pos and neg connections to the fuel pump) are not becoming glitchy and compromising the necessary electrical connection/power to the fuel pump.

Again...wondering if I can replace the whole thing with a trailer connector.?.?

Title: Re: The Dreaded Under-The-Tank 4 Pin Connector (85 K100rs)
Post by: Laitch on July 25, 2016, 12:39:08 AM

Quote from: robdiaz44 on July 24, 2016, 11:02:13 PM

my concern is that the 2 darker connectors (pos and neg connections to the fuel pump) are not becoming glitchy and compromising the necessary electrical connection/power to the fuel pump.

You're concerned that they're not becoming glitchy? Pour some salt on them and they'll be glitchy soon enough. :hehehe

Anyway, read this post (http://www.motobrick.com/index.php/topic,1741.msg8499.html#msg8499) and the two after it to allay your fears and get you going.

Title: Re: The Dreaded Under-The-Tank 4 Pin Connector (85 K100rs)
Post by: robdiaz44 on July 25, 2016, 02:18:16 AM

Thanks Laitch...ya, I kinda worded that part of my post as if I was hoping for some glitchiness, in which case, I should take your advice and pour some salt on those connectors  :falldown:

From reading that post, sounds like I will need to pursue getting a new fuel sender (since my '85 K100 can't be modded with the trailer connector). I've already replaced the female part of the connector, but I don't think I trust the male connectors of the sender. From the looks of the burnt plastic on the female end, there maybe unseen damage hidden behind the plastic of the male end.

Title: Re: The Dreaded Under-The-Tank 4 Pin Connector (85 K100rs)
Post by: Freccia on July 09, 2018, 11:56:10 AM

old thread- does anyone have a part number for this plug? thx in advance

Title: Re: The Dreaded Under-The-Tank 4 Pin Connector (85 K100rs)
Post by: rbm on July 09, 2018, 12:55:59 PM

This connector was recently proposed on another forum as meeting the need.

https://www.ebay.ca/itm/4-Pin-Grade-IP68-Waterproof-Electrical-Connector-Cable-Plug-Socket-Black-M14/262771837834?hash=item3d2e6c0b8a:g:chEAAOSwNnRYlXIm

NOTE:  It's not yet been confirmed that this plug actually works with the 83-85 fuel level sender / fuel pump connector.

Title: Re: The Dreaded Under-The-Tank 4 Pin Connector (85 K100rs)
Post by: johnny on July 09, 2018, 12:59:39 PM

greetings...

i have used 4 pin flat trailor wiring harness connectors with 100% positive results...


4pinFlatConnector.jpg (4.27 kB . 200x104 - viewed 1268 times)

j o

Title: Re: The Dreaded Under-The-Tank 4 Pin Connector (85 K100rs)
Post by: rbm on July 09, 2018, 01:01:52 PM

Johnny, that'll certainly work for the post-85 fuel sender but this thread is about the early 83-85 sender.  The plug has to be compatible with the receptacle.  There's no alternative.

Title: Re: The Dreaded Under-The-Tank 4 Pin Connector (85 K100rs)
Post by: Freccia on July 09, 2018, 01:51:15 PM

Quote from: rbm on July 09, 2018, 12:55:59 PM

This connector was recently proposed on another forum as meeting the need.

https://www.ebay.ca/itm/4-Pin-Grade-IP68-Waterproof-Electrical-Connector-Cable-Plug-Socket-Black-M14/262771837834?hash=item3d2e6c0b8a:g:chEAAOSwNnRYlXIm

NOTE:  It's not yet been confirmed that this plug actually works with the 83-85 fuel level sender / fuel pump connector.

Thanks rbm. Looks like it's worth a try/whittle.

ATBT

Title: Re: The Dreaded Under-The-Tank 4 Pin Connector (85 K100rs)
Post by: RobP on July 10, 2018, 04:02:49 PM

if you need to replace both sides anyway, consider a Delphi WeatherPak connector.