Author Topic: Wiring Harness Question ('78 Silverado)*SOLVED* rear lamp firewall bulkhead plug  (Read 134 times)

Offline jc74868

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After letting my '78 SWB Silverado sit for a couple of years, the rats got at it.  I bought a replacement in eBay. But, it turns out he didn't send all of it. It's a 3 piece thing: the bigger piece on the left has an oil sending unit, heat, alternator, starter, engine related stuff.  The middle piece is for headlights, signal lights, and then there's this piece on the far right...the piece that wasn't included and that I also need. Anyone know  what it is/what it goes to?

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« Last Edit: November 13, 2017, 10:14:30 AM by jc74868 »

Offline bd

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Re: Wiring Harness Question ('78 Silverado)
« Reply #1 on: November 12, 2017, 11:08:57 PM »
It is the rear lamp firewall bulkhead connector and harness.  It contains left turn/brake (yellow), right turn/brake (dark green), tail/marker/license plate lamps (brown), and backup (light green).  See the 1978 Wiring Manual for details.
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 jc74868

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Re: Wiring Harness Question ('78 Silverado)
« Reply #2 on: November 13, 2017, 10:14:28 AM »
Awesome. Thanks a million

Offline bd

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On some chassis the rear harness is in two sections.  The site store sells American Autowire harnesses.  Email Captkaos, webmaster@73-87chevytrucks.com, with what you want or need for a price and availability.
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)