1987 Pickup Dual Tank Switch Help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Mixup · 10-01-2020, 07:52 PM

I just got a 1987 Chevy 4wd with dual tanks. Somebody cut the plug off the back of the switch and I need to know how the wires go. There is a gray,tan, tan with white stripe and black.

Mathew21 · 10-01-2020, 07:59 PM

This may help http://forum.73-87chevytrucks.com/sm...ic,9072.0.html

Mixup · 10-02-2020, 05:11 PM

Mathew21 that helps but I need to know with the switch in my hand what color goes to what terminal. That diagram shows the correct colors.

**hatzie** · 10-02-2020, 08:18 PM

You could download the GM wiring diagrams for your truck.
1988 & 1989 are fairly easy to read 1987 are a bit obnoxious and the NL2 option wiring is the same in all three years.

**kwmech** · 10-02-2020, 08:27 PM

Just went through this, so this worked for me

Looking at the back of the SWITCH top up

the left top prong is bat +
the right top is ground
left lower LH
Right lower RH

I did different colors 'cuz I was making something custom for my 69, but that is where the wires go

Mixup · 10-04-2020, 10:24 AM

Thank You kwmech thats what i needed.

10-01-2020, 07:52 PM	#1
Mixup Registered User Join Date: Jan 2002 Location: Henderson, NV Posts: 358	1987 Pickup Dual Tank Switch Help I just got a 1987 Chevy 4wd with dual tanks. Somebody cut the plug off the back of the switch and I need to know how the wires go. There is a gray,tan, tan with white stripe and black. __________________ 1980 Chevy Shortbed Pickup 1969 Z28 engine Turbo 350

10-01-2020, 07:59 PM	#2
Mathew21 Registered User Join Date: May 2010 Location: Clinton township, MI Posts: 1,192	Re: 1987 Pickup Dual Tank Switch Help This may help http://forum.73-87chevytrucks.com/sm...ic,9072.0.html __________________ It only has original paint once

10-02-2020, 05:11 PM	#3
Mixup Registered User Join Date: Jan 2002 Location: Henderson, NV Posts: 358	Re: 1987 Pickup Dual Tank Switch Help Mathew21 that helps but I need to know with the switch in my hand what color goes to what terminal. That diagram shows the correct colors. __________________ 1980 Chevy Shortbed Pickup 1969 Z28 engine Turbo 350

10-02-2020, 08:18 PM	#4
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,977	Re: 1987 Pickup Dual Tank Switch Help You could download the GM wiring diagrams for your truck. 1988 & 1989 are fairly easy to read 1987 are a bit obnoxious and the NL2 option wiring is the same in all three years. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful. Last edited by hatzie; 10-05-2020 at 10:47 AM.

10-02-2020, 08:27 PM	#5
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,630	Re: 1987 Pickup Dual Tank Switch Help Just went through this, so this worked for me Looking at the back of the SWITCH top up the left top prong is bat + the right top is ground left lower LH Right lower RH I did different colors 'cuz I was making something custom for my 69, but that is where the wires go

10-04-2020, 10:24 AM	#6
Mixup Registered User Join Date: Jan 2002 Location: Henderson, NV Posts: 358	Re: 1987 Pickup Dual Tank Switch Help Thank You kwmech thats what i needed. __________________ 1980 Chevy Shortbed Pickup 1969 Z28 engine Turbo 350

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