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Author Topic: Wiring Diagram  (Read 857 times)

Offline SILSquarebody

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Wiring Diagram
« on: October 31, 2023, 08:02:13 AM »
I bought a 87 K5 Blazer. Need the wiring diagram for it. Changing out fuel tank and need to know diagram for the sensor. And I have other issues under the hood. Any help would be appreciated. Thanks in advance.
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Offline bd

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Re: Wiring Diagram
« Reply #1 on: October 31, 2023, 09:13:00 AM »
1987 GM Wiring Manual page 163 to end of manual


or here going to page 163:1987 GM Wiring Manual pge 163
« Last Edit: October 31, 2023, 12:02:34 PM by Captkaos »
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Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline SILSquarebody

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Re: Wiring Diagram
« Reply #2 on: October 31, 2023, 02:49:18 PM »
Thank you sir. Much appreciated.
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Offline SILSquarebody

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Re: Wiring Diagram
« Reply #3 on: November 06, 2023, 03:08:21 PM »
Well I have searched this from one end to the other and can not find the wiring for the fuel sending unit. Here is my dilema. I have an 87 Jimmy that had fuel injection. I changed the tank and put a tank and sending unit in it for an 86. I am trying to figre out how to wire the new sending unit in the wiring. It had 2 wires coming from the sending unit on the 87. I need to figure out which one was 12v for the pump and which one went to the fuel guage. If anyone could locate it in these diagrams it would be greatly appreciated. And any advice would be helpful also. Thanks in advance.
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Offline VileZambonie

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Re: Wiring Diagram
« Reply #4 on: November 06, 2023, 04:54:23 PM »
The last google security update made ALL of my hosted images vanish. So now we're  back to when Photobucket blackmailed us all...If anyone needs to see a missing image lmk and I'll go in and update the thread.
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Offline VileZambonie

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Re: Wiring Diagram
« Reply #5 on: November 06, 2023, 04:56:11 PM »
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,                           ___ 
                         /  _ _ _\_
              ⌠ŻŻŻŻŻ'   [☼===☼]
              `()_);-;()_)--o--)_)

74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline SILSquarebody

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Re: Wiring Diagram
« Reply #6 on: November 09, 2023, 02:03:04 PM »
I need one for the 87 that had the fuel pump in tank. I have a brown and green wire that went to the sending unit on the 87. I now have a 86 tank and sending unit. I wanted to power my electric fuel pump and also have the guage to work so I need to know which one is which. Thanks.
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Offline Captkaos

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Re: Wiring Diagram
« Reply #7 on: November 09, 2023, 04:06:51 PM »
Were you not able to look at the wiring schematic that bd posted, the second one takes you directly to the start of the wiring diagram section on page 163.  Same goes for the link Vile posted.
Both sending and pump wiring is listed in each of those links.
This is the same that bd posted only page 212 where a fuel pump is listed.
1987 GM Wiring Manual pge 212


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