Wiring Harness Pass Through Firewall

[97VortecChevy]

They can be found here

88-98 Service Manuals

Over the years I have collected a bunch of GM service literature. Links to PDF Scans of service and STG manuals and a links to the Parts manuals. You'll need the FREE Adobe Acrobat reader to open these files. Get it directly from Adobe here {http://get.adobe.com/reader/} If you're not...

www.gmt400.com

Going off memory, it's mostly gauge related.

Shoot if that’s the case I may not need them.. I’ll be running a Holley term X max and a prodash

They were cut on the engine bay side and I have no idea what they go to.. i don’t even know what to look up in the diagrams .. I found a service manual but can’t find that piece.. found a picture but no description

 

[Supercharged111]

Shoot if that’s the case I may not need them.. I’ll be running a Holley term X max and a prodash

They were cut on the engine bay side and I have no idea what they go to.. i don’t even know what to look up in the diagrams .. I found a service manual but can’t find that piece.. found a picture but no description

You should be searching for the plugs that are inside the truck. Looks like C200 is what you're after.

CCLB dually #2

Truck fired up today, so no other parasitic draw to worry about. The column didn't gave any shift linkage though. Time to shift focus to this weekend's upcoming race. Camper needs batteries and a propane refill. Hoping my brass Tick shifter bushing arrives in time!

www.gmt400.com

That's from a truck I flipped. I adapted a gas harness onto a diesel truck and the connector was different inside.

 

[97VortecChevy]

You should be searching for the plugs that are inside the truck. Looks like C200 is what you're after.

CCLB dually #2

Truck fired up today, so no other parasitic draw to worry about. The column didn't gave any shift linkage though. Time to shift focus to this weekend's upcoming race. Camper needs batteries and a propane refill. Hoping my brass Tick shifter bushing arrives in time!

www.gmt400.com

That's from a truck I flipped. I adapted a gas harness onto a diesel truck and the connector was different inside.

Thank you I appreciate it.. wiring schematics drive me crazy!

 

[xXxPARAGONxXx]

We say you need the manual because you do. And what you need to do is time consuming. Very time consuming, because you're not going to find all the information on one page of one manual. It's spread over the entire set.

It is true that the connector and all its cavities are identified on one page, but that does not tell you where the wire for each cavity goes and every wire that is spliced into that wire. And the connector has at least 50 cavities if I recall correctly.

 

[Komet]

I hit mine with a cutoff wheel until it fit through the hole, then I poked it through and forgot about it. Some of the red wires need power though, thus the need for a service manual. Heavy schematic research is pretty much inevitable with motor swaps.

 

[GoToGuy]

The wiring schematic has it called " GT101 Grommet " not a bulkhead connector. The under hood side has part # 12041304.
The interior cabin side has part #12041305.
If one side is damaged you should be able to identify wire colors. And your guide is the other side, the mirror image of wire layout.peel the tape or convo tube back, smart phone photos, winner!