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Old 01-06-2013, 05:54 PM   #1
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Default Wire tuck/Intermittent Electrical/Main relay

I will go through and add pictures for this, and it may take some more experianced electrical gurus.

1995 Honda Civic Cx

Fresh wire tuck, nothing was cut other than grounds in the engine bay on the white 8 plug ground terminals.

On the main relay, i get no power to the fuel pump to prime.
the t stat housing ground is connected.

relay unplugged
i have continuity to the fuel relay ground.
Green/Yellow no power to the pump
Yellow/White 12v battery supply is there
Yellow/Black (ecu power) 11.4v
yellow/Green -.51v (black to ground)
Black/yellow 11.4v (II)
Blue/White Ignition Switch -.51v (I) and 8v(II)


Ignition Switch
White 12vconstant
black white starter 12v start
black yelow 12v run start
white black 12v run
yellow I and II
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Old 01-06-2013, 06:01 PM   #2
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Default Re: Wiretuck/Intermitten Electrical/Main relay

How were the grounds reconnected? Soldered and shrink wrapped?
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Old 01-07-2013, 01:41 AM   #3
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Default Re: Wiretuck/Intermitten Electrical/Main relay

The grounds themselves were ran through thefender. Ends were cut off and attached to butt style ring connectors.
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Old 01-08-2013, 04:37 AM   #4
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Default Re: Wiretuck/Intermitten Electrical/Main relay

Checked all grounds for contunuity to the frame. All xhecked good. Next going to check every power and ground to the ecu
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Old 01-08-2013, 05:57 AM   #5
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Default Re: Wiretuck/Intermitten Electrical/Main relay

is it a fuel pump prime delay? if so, it could be capacitor 14 in your ecu, this is a common issue
http://www.hondata.com/tech_capacitor_obd1.html

Chipped p28 - not priming fuel pump
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Old 01-08-2013, 08:35 AM   #6
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Default Re: Wiretuck/Intermitten Electrical/Main relay

Both relay anf ecu tested in my teg. Tested fine.
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Old 01-08-2013, 08:55 AM   #7
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Default Re: Wiretuck/Intermitten Electrical/Main relay

Its issues like this that make me rethink attempting to do a tuck
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Old 01-08-2013, 10:21 AM   #8
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Default Re: Wiretuck/Intermitten Electrical/Main relay

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Originally Posted by xero_xero View Post

relay unplugged...
Green/Yellow no power to the pump
The Grn/Yel wire cannot get voltage if the relay is unplugged. Redo the voltage test at the fuel pump with the relay plugged in. Use the fuel pump connector Blk wire as ground and compare the voltage reading when using the chassis as ground.
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Old 01-10-2013, 04:50 AM   #9
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Default Re: Wiretuck/Intermitten Electrical/Main relay

Ok.
Looking for the service tech manual at the moment.
Does anyone have any pdf that are not scans?
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Old 01-10-2013, 07:23 AM   #10
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Default Re: Wiretuck/Intermitten Electrical/Main relay

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Originally Posted by xero_xero View Post
Looking for the service tech manual at the moment.
Should be easy to find with a Google search.
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Old 01-11-2013, 03:47 PM   #11
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Default Re: Wire tuck/Intermittent Electrical/Main relay

just rechecked everything. have continuity to the ecu grounds and chassis.
i get 9.5v from the blu/whi on start only, not run.
0v to fuel pump chassis ground and fuel pump ground
i checked the jumper harness that i made to do the wire tuck, and every terminal end matches.
and the next step is to undo the engine hanress and plug it strait.

ill post up pics in about 15.
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Old 01-21-2013, 04:33 PM   #12
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Default Re: Wire tuck/Intermittent Electrical/Main relay

neglected ground.

after hours of tearing apart everything, i checked voltage at the chassis and on the physical grounds.

broken ground wire off of the curent car i am driving.

on harness, nearly impossible to find. pulled 5 volts when 12 was there.
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