What are these boxes for? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

fun in dirt · 11-28-2022, 05:46 PM

What are these 2 boxes for? Both harnesses from each go back into the big harness into back of fuse block it appears.
This is on our '85 K30 (which was originally a C30 changed to a 4x4 by a conversion company for the Forestry Service or Air Force).
Checked our '85 C10 & it does not have either of these on its firewall.

**kwmech** · 12-01-2022, 12:27 PM

Unplug them and find what doesn't work?

**kev2809** · 12-03-2022, 09:16 AM

I don't own a square body but I tried googling both an 85 k30 and c30 engine bays and didn't see one firewall with those 2 boxes. maybe when they did the conversion they added something?

fun in dirt · 12-05-2022, 12:56 PM

Quote:

Originally Posted by kev2809

I don't own a square body but I tried googling both an 85 k30 and c30 engine bays and didn't see one firewall with those 2 boxes. maybe when they did the conversion they added something?

That's kinda what I'm thinking too.

Guess I'll unwrap & follow wires to find out for sure - but since 668 views & nobody knew for sure, I don't feel so bad

**kev2809** · 12-05-2022, 06:53 PM

ya this must be an oddball, i figured someone wouldve known lol. have you checked any stock wiring diagrams?

11-28-2022, 05:46 PM	#1
fun in dirt Registered User Join Date: Jan 2007 Location: Mississippi Posts: 2,117	What are these boxes for? What are these 2 boxes for? Both harnesses from each go back into the big harness into back of fuse block it appears. This is on our '85 K30 (which was originally a C30 changed to a 4x4 by a conversion company for the Forestry Service or Air Force). Checked our '85 C10 & it does not have either of these on its firewall. Attached Images __________________ '72 C to K20 "Cannibalizer" http://67-72chevytrucks.com/vboard/s...32#post8653432 '85 K30 "Big Nassy" '06 3500 Duramax ...tow truck '06 Silverado SS...DD '06 C1500 WT...DD '07 Classic C1500 WT...DD Built & sold cause can't keep 'em all: '72 Blazer "The Bucket" http://67-72chevytrucks.com/vboard/s...d.php?t=433190 '55 Chevy straight axle gasser https://www.trifive.com/forums/showthread.php?t=173938 '69 Pro Street Chevelle http://www.chevelles.com/forums/showthread.php?t=332541 '86 M1031 CUCV http://67-72chevytrucks.com/vboard/s...d.php?t=553619

12-01-2022, 12:27 PM	#2
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,387	Re: What are these boxes for? Unplug them and find what doesn't work?

12-03-2022, 09:16 AM	#3
kev2809 low n' slo Join Date: Mar 2009 Location: rosenberg, texas Posts: 5,133	Re: What are these boxes for? I don't own a square body but I tried googling both an 85 k30 and c30 engine bays and didn't see one firewall with those 2 boxes. maybe when they did the conversion they added something? __________________ 67 1/2 ton Suburban - Project DRGNWGN. Build thread -_--_--_ _________ _--_-_ -/____\|__\|__\__ ,.,,,.,.,,.,\|_O _______ O_]

12-05-2022, 06:53 PM	#5
kev2809 low n' slo Join Date: Mar 2009 Location: rosenberg, texas Posts: 5,133	Re: What are these boxes for? ya this must be an oddball, i figured someone wouldve known lol. have you checked any stock wiring diagrams? __________________ 67 1/2 ton Suburban - Project DRGNWGN. Build thread -_--_--_ _________ _--_-_ -/____\|__\|__\__ ,.,,,.,.,,.,\|_O _______ O_]



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