what's this to and where does it connect

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what's this to and where does it connect

Postby imtonydillard » Sun Aug 12, 2018 5:45 pm

Re 1990 D150 3.9L

This harness is under the dash on the driver side. The wire colors are: Blue white, Yellow red, White green and Brown red.

Any idea what they go to and where the receiving connector might be located?

http://s58.photobucket.com/user/imtonydillard/media/wire_zpscmlk38rt.jpg.html?sort=3&o=0
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Re: what's this to and where does it connect

Postby PToombs » Mon Aug 13, 2018 4:34 pm

Here it is,

Image
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Re: what's this to and where does it connect

Postby imtonydillard » Mon Aug 13, 2018 6:02 pm

Pete - I don't understand your response.
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Re: what's this to and where does it connect

Postby PToombs » Tue Aug 14, 2018 5:19 pm

I copied the tag and posted your pic right on the page so it can be seen without going off site.
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Re: what's this to and where does it connect

Postby imtonydillard » Mon Aug 20, 2018 12:26 pm

thx
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Re: what's this to and where does it connect

Postby thrashingcows » Sat Aug 25, 2018 12:29 pm

I don't know for sure but wonder if it is for a factory tach?
1984/93 Dodge Crewcab, W350, 1 Ton SRW, long box, 330K Km's, M&H spacer, 366 spring, fuel pin to deep side, 14cm housing, Piston LP, PS IC, Isspro Boost, Pyro and tach, NV4500, 29 spline NP205, 3.54's.


Check out the build....http://www.dieseltruckresource.com/dev/ ... 05923.html
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Re: what's this to and where does it connect

Postby PToombs » Sat Aug 25, 2018 4:18 pm

Factory tach plug is gray and flat, not squared.

I just went and looked at my truck and thought I didn't have it, and realized I do, it's fastened to the hood handle bracket. I think it's the diagnostic plug for the ABS system.
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Re: what's this to and where does it connect

Postby cougar » Sun Aug 26, 2018 10:22 am

According to my FSM, it says "RWAL Test Connector (In Plant Use Only).
RIP 91.5 W250 5 speed. The great experiment.
92 W250 HD 47RH with Compushift. Upgraded H1C to 60/60/16, modified fuel pin, and DAP 7X.010 injectors.
01 2500 "the work truck".
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Re: what's this to and where does it connect

Postby PToombs » Sun Aug 26, 2018 4:53 pm

Yup, thought it was after I looked at my truck.
I never bothered looking in the FSM because I wasn't sure where to look to find a random connector under the dash. ;)
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