Did the factory make this mess ?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Johnl48** · 10-29-2022, 07:12 PM

Is this how the factory mounted all these junction boxes on the radiator support ? Pic of yours ??
Thanks
70 C20

57taskforce · 10-29-2022, 07:40 PM

I don’t believe the factory made that mess. Mine had/has nothing more than the voltage regulator and wiring and the horn in that general area.

**Steeveedee** · 10-29-2022, 08:23 PM

Nope, not with that style of crimp connectors.

**Johnl48** · 10-29-2022, 08:39 PM

Phew...thanks

**FirstOwner69** · 10-29-2022, 09:05 PM

The factory did as shown in pics below. You probably don't have the 12 gauge red wire. It's part of the factory camper wiring option. I'm not sure of when the factory moved the washer bottle to the fender.

**Johnl48** · 10-29-2022, 09:19 PM

Quote:

Originally Posted by FirstOwner69

The factory did as shown in pic below. You probably don't have the 12 gauge red wire. It's part of the factory camper wiring option. I'm not sure of when the factory moved the washer bottle to the fender.

Wasn't sure what all those junction boxes were for. What is that black disc on the lower left ? Mine didn't have that

**FirstOwner69** · 10-29-2022, 09:21 PM

Quote:

Originally Posted by Johnl48

...What is that black disc on the lower left ? Mine didn't have that

High note horn option.

**Johnl48** · 10-29-2022, 09:22 PM

Thanks

**HO455** · 10-29-2022, 09:36 PM

Is this on a 67/68 with the 63 amp alternator? The two insulated blocks were used on those truck with the early larger alternator. So some of what you see may have been from the factory.

It also looks like there might be a trailer brake resistor tucked up in there too. Is there a trailer brake controller inside the cab?

**Johnl48** · 10-29-2022, 09:44 PM

Quote:

Originally Posted by HO455

Is this on a 67/68 with the 63 amp alternator? The two insulated blocks were used on those truck with the early larger alternator. So some of what you see may have been from the factory.

It also looks like there might be a trailer brake resistor tucked up in there too. Is there a trailer brake controller inside the cab?

1970 c20. There was a trailer brake controller but that stuff is not going back on. The red wires going to the blocks do look like part of the harness. Not added

57taskforce · 10-29-2022, 10:47 PM

Those red wires taped to the harness do not look factory at all to me.

**Grumpy old man** · 10-30-2022, 07:00 AM

None of that red wire belongs there , The factory didn't crimp wire ends that way and I'm more interested in WHAT all that mess is feeding power to ?? Aftermarket fog lights ? I'd start by chasing the wires to see what it's sending power to ?

https://www.youtube.com/watch?v=nW_TtiNDSI0

**Johnl48** · 10-30-2022, 08:25 AM

Quote:

Originally Posted by Grumpy old man

None of that red wire belongs there , The factory didn't crimp wire ends that way and I'm more interested in WHAT all that mess is feeding power to ?? Aftermarket fog lights ? I'd start by chasing the wires to see what it's sending power to ?

https://www.youtube.com/watch?v=nW_TtiNDSI0

The truck is being restored I'm in the process of cleaning up the harness and putting it back in. Only thing I saw was a trailer brake.
The photo was taken before I stripped the truck

**Johnl48** · 10-30-2022, 09:44 AM

Quote:

Originally Posted by Grumpy old man

None of that red wire belongs there , The factory didn't crimp wire ends that way and I'm more interested in WHAT all that mess is feeding power to ?? Aftermarket fog lights ? I'd start by chasing the wires to see what it's sending power to ?

https://www.youtube.com/watch?v=nW_TtiNDSI0

The red wires going to the blocks look factory. They are coming out of the harness

**HO455** · 10-30-2022, 01:25 PM

Was your truck a fleet or commercial truck? The SPID should indicate a larger alternator. Like K76 or K81?

The truck I parted that had those terminal blocks was a ex-Weyerhaeuser fire response Suburban. The factory provided those terminal blocks for fleet or commercial customers to hook up their aftermarket accessories for correct voltage sensing by the charging system.

I have been unable to find any kind of wiring diagram that shows the extra wiring for these larger alternators.
If yours still has the original 61 amp style alternator it should look like the one below if it is a 67-68. I've only seen this set up on 68 and earlier trucks.

The wiring in your last post looks like what I've seen before in trucks that came from the factory with higher output alternators.

**Johnl48** · 10-30-2022, 02:10 PM

Quote:

Originally Posted by HO455

Was your truck a fleet or commercial truck? The SPID should indicate a larger alternator. Like K76 or K81?

The truck I parted that had those terminal blocks was a ex-Weyerhaeuser fire response Suburban. The factory provided those terminal blocks for fleet or commercial customers to hook up their aftermarket accessories for correct voltage sensing by the charging system.

I have been unable to find any kind of wiring diagram that shows the extra wiring for these larger alternators.
If yours still has the original 61 amp style alternator it should look like the one below if it is a 67-68. I've only seen this set up on 68 and earlier trucks.

The wiring in your last post looks like what I've seen before in trucks that came from the factory with higher output alternators.

It does have a k76 61 amp code on spid.. not sure what the truck was in its previous life

**Johnl48** · 10-30-2022, 02:10 PM

**Grumpy old man** · 10-30-2022, 04:43 PM

Ahhh, a K20 In West Milford , Nj . I'm from that area , We destroyed a bunch of K20's PLOWING SNOW and selling cord wood back in the 70's , And that setup looks like it was used for an electric angle plow and aux lights .That would explain the 2 juntion blocks and relay

**Johnl48** · 10-30-2022, 04:57 PM

Quote:

Originally Posted by Grumpy old man

Ahhh, a K20 In West Milford , Nj . I'm from that area , We destroyed a bunch of K20's PLOWING SNOW and selling cord wood back in the 70's , And that setup looks like it was used for an electric angle plow and aux lights .That would explain the 2 juntion blocks and relay

So that would be a factory harness with this blocks ?

Born and raised in west milford I probably know you

**Grumpy old man** · 10-30-2022, 05:29 PM

Not factory from GM but the wiring harness that came with the plow back then Western was a popular model . check the front bumper for mounting holes . If I remember right trhe lower frame of the plow was mounted to frame / axle tube ? that bumper looks like it's seen some plow work in it's life .

What type of connectors are on the ends of the wiring ?

**Grumpy old man** · 10-30-2022, 05:40 PM

http://67-72chevytrucks.com/vboard/s...d.php?t=603971

**Johnl48** · 10-30-2022, 05:41 PM

That bumper is long gone. I didn't see any evidence of a plow

This is what it look like now

Those 2 red wires attached to the junction boxes are deep into the factory harness. They also have the same ends that the box on the passenger fender from factory has

**Johnl48** · 10-30-2022, 05:49 PM

**Johnl48** · 10-30-2022, 06:43 PM

Look what I found...guess they were factory

**Steeveedee** · 10-30-2022, 07:42 PM

The only difference would be the crimp connectors in the OP. I don't think that GM used them?

10-29-2022, 07:12 PM	#1
Johnl48 Senior Member Join Date: Jun 2021 Location: West milford nj Posts: 326	Did the factory make this mess ?? Is this how the factory mounted all these junction boxes on the radiator support ? Pic of yours ?? Thanks 70 C20

10-29-2022, 07:40 PM	#2
57taskforce All about them K’s Join Date: Jun 2014 Location: Land of Entrapment Posts: 6,487	Re: Did the factory make this mess ?? I don’t believe the factory made that mess. Mine had/has nothing more than the voltage regulator and wiring and the horn in that general area. __________________ Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne: 5” lift, 35’s, front dana 60 blah blah blah… http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB: 4” lift 33”s… in a million pieces http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 35x12.5x20’s

10-29-2022, 08:23 PM	#3
Steeveedee Who Changed This? Join Date: Jan 2013 Location: Simi Valley, CA Posts: 10,676	Re: Did the factory make this mess ?? Nope, not with that style of crimp connectors. __________________ ~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA

10-29-2022, 08:39 PM	#4
Johnl48 Senior Member Join Date: Jun 2021 Location: West milford nj Posts: 326	Re: Did the factory make this mess ?? Phew...thanks

10-29-2022, 09:05 PM	#5
FirstOwner69 Senior Member Join Date: May 2010 Location: Wisconsin & Arizona Posts: 4,852	Re: Did the factory make this mess ?? The factory did as shown in pics below. You probably don't have the 12 gauge red wire. It's part of the factory camper wiring option. I'm not sure of when the factory moved the washer bottle to the fender. Attached Images __________________ Jim Last edited by FirstOwner69; 10-29-2022 at 09:19 PM.

10-29-2022, 09:22 PM	#8
Johnl48 Senior Member Join Date: Jun 2021 Location: West milford nj Posts: 326	Re: Did the factory make this mess ?? Thanks

10-29-2022, 09:36 PM	#9
HO455 Post Whore Join Date: Feb 2016 Location: Portland Oregon Posts: 11,350	Re: Did the factory make this mess ?? Is this on a 67/68 with the 63 amp alternator? The two insulated blocks were used on those truck with the early larger alternator. So some of what you see may have been from the factory. It also looks like there might be a trailer brake resistor tucked up in there too. Is there a trailer brake controller inside the cab? __________________ Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377

10-29-2022, 10:47 PM	#11
57taskforce All about them K’s Join Date: Jun 2014 Location: Land of Entrapment Posts: 6,487	Re: Did the factory make this mess ?? Those red wires taped to the harness do not look factory at all to me. __________________ Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne: 5” lift, 35’s, front dana 60 blah blah blah… http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB: 4” lift 33”s… in a million pieces http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 35x12.5x20’s

10-30-2022, 07:00 AM	#12
Grumpy old man Senior Member Join Date: Dec 2013 Location: Gods country East,Tn Posts: 8,545	Re: Did the factory make this mess ?? None of that red wire belongs there , The factory didn't crimp wire ends that way and I'm more interested in WHAT all that mess is feeding power to ?? Aftermarket fog lights ? I'd start by chasing the wires to see what it's sending power to ? https://www.youtube.com/watch?v=nW_TtiNDSI0 __________________ 1967 Factory short bed - Old school '71 - 350 / 4bolt / 487 heads / Edelbrock C3BX Muncie M-22 4 speed / Hurst Comp plus Factory 12 bolt posi 3.73 / 255-70-15 Smoothed firewall / Factory cowl induction Power disc brakes / power steering / 3.5-5" drop

10-30-2022, 01:25 PM	#15
HO455 Post Whore Join Date: Feb 2016 Location: Portland Oregon Posts: 11,350	Re: Did the factory make this mess ?? Was your truck a fleet or commercial truck? The SPID should indicate a larger alternator. Like K76 or K81? The truck I parted that had those terminal blocks was a ex-Weyerhaeuser fire response Suburban. The factory provided those terminal blocks for fleet or commercial customers to hook up their aftermarket accessories for correct voltage sensing by the charging system. I have been unable to find any kind of wiring diagram that shows the extra wiring for these larger alternators. If yours still has the original 61 amp style alternator it should look like the one below if it is a 67-68. I've only seen this set up on 68 and earlier trucks. The wiring in your last post looks like what I've seen before in trucks that came from the factory with higher output alternators. Attached Images __________________ Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377 Last edited by HO455; 10-30-2022 at 01:32 PM.

10-30-2022, 02:10 PM	#17
Johnl48 Senior Member Join Date: Jun 2021 Location: West milford nj Posts: 326	Re: Did the factory make this mess ??

10-30-2022, 04:43 PM	#18
Grumpy old man Senior Member Join Date: Dec 2013 Location: Gods country East,Tn Posts: 8,545	Re: Did the factory make this mess ?? Ahhh, a K20 In West Milford , Nj . I'm from that area , We destroyed a bunch of K20's PLOWING SNOW and selling cord wood back in the 70's , And that setup looks like it was used for an electric angle plow and aux lights .That would explain the 2 juntion blocks and relay __________________ 1967 Factory short bed - Old school '71 - 350 / 4bolt / 487 heads / Edelbrock C3BX Muncie M-22 4 speed / Hurst Comp plus Factory 12 bolt posi 3.73 / 255-70-15 Smoothed firewall / Factory cowl induction Power disc brakes / power steering / 3.5-5" drop

10-30-2022, 05:29 PM	#20
Grumpy old man Senior Member Join Date: Dec 2013 Location: Gods country East,Tn Posts: 8,545	Re: Did the factory make this mess ?? Not factory from GM but the wiring harness that came with the plow back then Western was a popular model . check the front bumper for mounting holes . If I remember right trhe lower frame of the plow was mounted to frame / axle tube ? that bumper looks like it's seen some plow work in it's life . What type of connectors are on the ends of the wiring ? __________________ 1967 Factory short bed - Old school '71 - 350 / 4bolt / 487 heads / Edelbrock C3BX Muncie M-22 4 speed / Hurst Comp plus Factory 12 bolt posi 3.73 / 255-70-15 Smoothed firewall / Factory cowl induction Power disc brakes / power steering / 3.5-5" drop

10-30-2022, 05:40 PM	#21
Grumpy old man Senior Member Join Date: Dec 2013 Location: Gods country East,Tn Posts: 8,545	Re: Did the factory make this mess ?? http://67-72chevytrucks.com/vboard/s...d.php?t=603971 __________________ 1967 Factory short bed - Old school '71 - 350 / 4bolt / 487 heads / Edelbrock C3BX Muncie M-22 4 speed / Hurst Comp plus Factory 12 bolt posi 3.73 / 255-70-15 Smoothed firewall / Factory cowl induction Power disc brakes / power steering / 3.5-5" drop

10-30-2022, 05:41 PM	#22
Johnl48 Senior Member Join Date: Jun 2021 Location: West milford nj Posts: 326	Re: Did the factory make this mess ?? That bumper is long gone. I didn't see any evidence of a plow This is what it look like now Those 2 red wires attached to the junction boxes are deep into the factory harness. They also have the same ends that the box on the passenger fender from factory has



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10-30-2022, 05:49 PM	#23
Johnl48 Senior Member Join Date: Jun 2021 Location: West milford nj Posts: 326	Re: Did the factory make this mess ??

10-30-2022, 06:43 PM	#24
Johnl48 Senior Member Join Date: Jun 2021 Location: West milford nj Posts: 326	Re: Did the factory make this mess ?? Look what I found...guess they were factory

10-30-2022, 07:42 PM	#25
Steeveedee Who Changed This? Join Date: Jan 2013 Location: Simi Valley, CA Posts: 10,676	Re: Did the factory make this mess ?? The only difference would be the crimp connectors in the OP. I don't think that GM used them? __________________ ~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA

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