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post #1 of 49 (permalink) Old 08-23-2011, 11:08 PM Thread Starter
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Ground wire list?

Is there a list or diagram of all the electrical ground wires? I had a weird problem where the truck wouldn't start unless the OBDII code scanner was plugged in!
I searched around on other forums and I guess the scanner acts as a ground for the ECU. So I need to figure out what ground wires I forgot to reconnect...

Anyone know if there is such a diagram or list??


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post #2 of 49 (permalink) Old 08-23-2011, 11:31 PM
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Re: Ground wire list?

There is a "Ground Points" section in the Factory Wiring Diagrams. The ECM grounds on the intake manifold near the TB (brown wires on a ring terminal), You may have left this loose when installing your FF intake. If no one else posts it, you can PM me your E-mail address and I'll scan for you
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post #3 of 49 (permalink) Old 08-23-2011, 11:33 PM
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Re: Ground wire list?

Here's a 1999 diagram illustrating what components ground to which ground points. The locations of the ground points are given in the table at the end of the document.
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File Type: pdf Ground_Points-99.pdf (67.2 KB, 215 views)

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post #4 of 49 (permalink) Old 08-24-2011, 08:41 AM Thread Starter
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Re: Ground wire list?

Thanks for the help, I will get back to you on how it goes.


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post #5 of 49 (permalink) Old 10-04-2011, 03:46 PM Thread Starter
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Re: Ground wire list?

So I am still having the same problems. But I may have it narrowed down. I have had a couple codes concerning the o2 sensor bank 1 and sensor 2... and ignition... since my truck wont start with the code reader plugged in... and will shut off if its unplugged.

So I think it may correlate to the ground on this picture posted. It says that this ground is located Near the Throttle Body. Does anyone know where this ground is? Explanation or picture would be awesome. I can't seem to be able to find a ground that needs grounding.

I think that this issue may be correlated to a few other issues I am having. So I would greatly appreciate some input. Thanks

Another question on a side note. Are there any grounds on the intake manifold? And would it affect the ground if mine is powdercoated?
Thanks again


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File Type: jpg ScreenShot2011-10-04at33906AM.jpg (24.5 KB, 26 views)


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Last edited by Enola Gaia; 05-27-2012 at 08:13 AM.
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post #6 of 49 (permalink) Old 10-04-2011, 05:26 PM
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Re: Ground wire list?

Here (attached) is a diagram illustrating the location of ground point EB on a 1999 4-cylinder Taco.
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File Type: jpg 2RZ+3RZEngBayConns.jpg (45.5 KB, 95 views)

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post #7 of 49 (permalink) Old 10-04-2011, 06:03 PM Thread Starter
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Re: Ground wire list?

Awesome! Thanks Randy!


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post #8 of 49 (permalink) Old 10-04-2011, 06:11 PM Thread Starter
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Re: Ground wire list?

Anybody know if the powdercoating on the intake would affect the groudability...(if thats a word)


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post #9 of 49 (permalink) Old 10-04-2011, 06:14 PM
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Re: Ground wire list?

Quote:
Originally Posted by Josh Taco View Post
Anybody know if the powdercoating on the intake would affect the groudability...(if thats a word)
yes, im pretty sure powder coat is not a good conductor...either scrape it off for the ground, or find another ground source

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post #10 of 49 (permalink) Old 10-04-2011, 07:02 PM Thread Starter
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Re: Ground wire list?

Quote:
Originally Posted by blackedout_taco_stidham View Post
yes, im pretty sure powder coat is not a good conductor...either scrape it off for the ground, or find another ground source
k, thanks, does it have to be to the block? or can I ground on the fender or something


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