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03-28-2012, 02:16 PM
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#1 |
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Always a work in progress
Join Date: Jun 2007
Location: Harker Heights, TX
Posts: 1,599
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For those that have used the 87 Spectra tank/sending unit
I have everything installed and now I need to wire it up. I have the 87 fuel tank and sending unit with the EP381 fuel pump. I would like to get my fuel gauge working again so I need to know how to hook it all up. If you have a wiring diagram I would appreciate it.
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USMC Retired Never trust a man who can't laugh at his own fart! 2010 Silverado Crew Cab 73 SWB 5.3/4l80e Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=695168 |
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03-29-2012, 02:24 PM
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#2 |
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Slots go on anything!
Join Date: May 2003
Location: Richardson, TX
Posts: 5,957
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Re: For those that have used the 87 Spectra tank/sending unit
IIRC, the pink wire goes to the gauge, the other (tan?) wire is power. The pump will be grounded at teh tank, through the sender.
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1974 Jimmy- 5.3/4L80e/NP241 |
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03-29-2012, 08:12 PM
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#3 |
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Registered User
 
Join Date: Jan 2007
Location: Central Coast California
Posts: 1,026
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Re: For those that have used the 87 Spectra tank/sending unit
iirc, gray to fuel pump power, purple to gauge, ground to ground.
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1972 K20 Suburban 5.7/700r4/NP205 Dana 44/H052 Sold  1972 C10 5.3L/4L60E 12bolt 5Lug - Sold 1971 K5 Blazer 6.0L LQ9 4L60E NP205 Dana 44/H052!!!  1970 K3500 1ton CrewCab 8.1L/Allison1000/NP205 Dana 60/14B!!!! - Sold 1984 K10 SWB 7.4L/4L80e/NP208 Corp 10/12 bolt Sold 1988 V30 CCLB 7.4L/TH400/NP205/Dana 60/Dana 70/3.73!!! (Sold) 2003 K2500HD 8.1/Allison1000/NP263
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03-30-2012, 10:42 AM
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#4 |
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Slots go on anything!
Join Date: May 2003
Location: Richardson, TX
Posts: 5,957
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Re: For those that have used the 87 Spectra tank/sending unit
It is exactly the reverse of whet you would think; the lighter color is the gauge. The dual tank senders are differenct colors on each side, too.
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1974 Jimmy- 5.3/4L80e/NP241 |
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05-08-2012, 12:32 PM
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#5 |
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Always a work in progress
Join Date: Jun 2007
Location: Harker Heights, TX
Posts: 1,599
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Re: For those that have used the 87 Spectra tank/sending unit
I am bringing this up again bc I am about to wire up my fuel pump and there are 2 different ways that came up.
Is it dark to power or light to power?
__________________
USMC Retired Never trust a man who can't laugh at his own fart! 2010 Silverado Crew Cab 73 SWB 5.3/4l80e Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=695168 |
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05-08-2012, 12:39 PM
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#6 |
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Slots go on anything!
Join Date: May 2003
Location: Richardson, TX
Posts: 5,957
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Re: For those that have used the 87 Spectra tank/sending unit
I remember it is opposite of what you would expect. The A/M harness I used has a grey wire out to fuel pump power.
__________________
1974 Jimmy- 5.3/4L80e/NP241 |
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05-08-2012, 10:32 PM
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#7 |
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Always a work in progress
Join Date: Jun 2007
Location: Harker Heights, TX
Posts: 1,599
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Re: For those that have used the 87 Spectra tank/sending unit
Just to make sure that we are talking about the same thing, I have the spectre sending unit that has 3 wires coming out, 1 single wire for the ground and a 2 wire plug. I need to know which wire I supply the power from the relay to. I might have read your post wrong but it sounds like you are talking about the stock truck wiring.
__________________
USMC Retired Never trust a man who can't laugh at his own fart! 2010 Silverado Crew Cab 73 SWB 5.3/4l80e Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=695168 |
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05-11-2012, 01:35 PM
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#8 |
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Registered User
Join Date: Jan 2007
Location: Central Coast California
Posts: 1,026
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Re: For those that have used the 87 Spectra tank/sending unit
grey is power. purple is gauge.
hook up the purple. plug and unplug it and watch your gauge to confirm it is gauge.
__________________
1972 K20 Suburban 5.7/700r4/NP205 Dana 44/H052 Sold 1972 C10 5.3L/4L60E 12bolt 5Lug - Sold 1971 K5 Blazer 6.0L LQ9 4L60E NP205 Dana 44/H052!!! 1970 K3500 1ton CrewCab 8.1L/Allison1000/NP205 Dana 60/14B!!!! - Sold 1984 K10 SWB 7.4L/4L80e/NP208 Corp 10/12 bolt Sold 1988 V30 CCLB 7.4L/TH400/NP205/Dana 60/Dana 70/3.73!!! (Sold) 2003 K2500HD 8.1/Allison1000/NP263
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05-11-2012, 02:07 PM
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#9 | |
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Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,118
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Re: For those that have used the 87 Spectra tank/sending unit
Quote:
Posted via Mobile Device
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My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html |
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05-11-2012, 10:17 PM
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#10 |
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Always a work in progress
Join Date: Jun 2007
Location: Harker Heights, TX
Posts: 1,599
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Re: For those that have used the 87 Spectra tank/sending unit
Ok thanks guys. One more thing I plan to check off my list this weekend
__________________
USMC Retired Never trust a man who can't laugh at his own fart! 2010 Silverado Crew Cab 73 SWB 5.3/4l80e Build Thread: http://67-72chevytrucks.com/vboard/s...d.php?t=695168 |
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