Help Me With These Original Connections - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jamesmadconductor · 07-14-2016, 10:36 AM

Hello all,

In the process of replacing my radio and all new ductwork, I stumbled across these two original (I believe) connections that aren't connected. Can anyone identify these?

**70STOVEBOLT** · 07-14-2016, 12:51 PM

I believe the first pic is A/C connector, the second is for the TH400 kickdown switch.

**Cali72K20** · 07-14-2016, 05:41 PM

high/low beam switch connector?

Gromit · 07-14-2016, 05:54 PM

I have a '70 C10 and redid my dash wiring harness but I couldn't tell from your photos. One kinda looks like the horn relay but the colors don't match.

In your first photo I can't tell if there are two wires going to the lower position of the Packard 56 series connector or one.. It would help to see a photo of that connector end-on..

Same with the second photo - it is important to see how the connectors are oriented, (vertical or horizontal); because some connectors are very similar but they are generally designed so they will only connect in one way.. The wire colors may be faded; so it would help too to know if there is a stripe and what your best guess is of the wire colors; sometimes you can trace it up to a place where it is less faded and what looked like a pink wire you can then see actually was originally red.

Also, is yours a factory A/C truck? And what year and model?

**70STOVEBOLT** · 07-14-2016, 09:19 PM

The second pic is definitely for TH400 kickdown switch.

Gromit · 07-14-2016, 09:57 PM

Here is the photo of the closest thing I could come up with - though like I wrote earlier the one or two wire colors differ from yours so I'm not sure.

I hope I'm recalling correctly that was the horn relay whatever brain cell of mine was storing that seems to be missing at the moment.

My truck has the TH350 so that would explain why I don't recognize what 70Stovebolt identified as the electric kickdown wire connector - mine has the mechanical kickdown instead.

**chewychevy67** · 07-15-2016, 01:45 AM

I believe the first picture is the connector for a anti- diesel relay. It's part of the a/c harness in 71 72 I believe.

Gromit · 07-15-2016, 02:35 AM

Awesome skills ChewyChevy! That looks right on.. I'm glad to know too because neither of those connectors or wires are on my '70 so I can stop wondering..

07-14-2016, 10:36 AM	#1
jamesmadconductor Registered User Join Date: Feb 2016 Location: Burnsville, NC Posts: 14	Help Me With These Original Connections Hello all, In the process of replacing my radio and all new ductwork, I stumbled across these two original (I believe) connections that aren't connected. Can anyone identify these? Attached Images __________________ James 1949 Chevy 3800 Panel Truck 1971 Chevy C20 Cheyenne BB402 1958 Cadillac Series 62 1958 MG-A 1940 LaSalle Series 52 Coupe 1912 Ford Model T

07-14-2016, 12:51 PM	#2
70STOVEBOLT Senior Member Join Date: Jun 2005 Location: Winona Lake, IN Posts: 6,414	Re: Help Me With These Original Connections I believe the first pic is A/C connector, the second is for the TH400 kickdown switch. __________________ 70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Sliding Rear Window Power Windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear

07-14-2016, 05:41 PM	#3
Cali72K20 Senior Member Join Date: Aug 2013 Location: Northern Santa Barbara County, California Posts: 2,706	Re: Help Me With These Original Connections high/low beam switch connector? Last edited by Cali72K20; 07-14-2016 at 05:42 PM. Reason: punctuation

07-14-2016, 05:54 PM	#4
Gromit Registered User Join Date: Jul 2015 Location: Central Coast, CA Posts: 501	Re: Help Me With These Original Connections I have a '70 C10 and redid my dash wiring harness but I couldn't tell from your photos. One kinda looks like the horn relay but the colors don't match. In your first photo I can't tell if there are two wires going to the lower position of the Packard 56 series connector or one.. It would help to see a photo of that connector end-on.. Same with the second photo - it is important to see how the connectors are oriented, (vertical or horizontal); because some connectors are very similar but they are generally designed so they will only connect in one way.. The wire colors may be faded; so it would help too to know if there is a stripe and what your best guess is of the wire colors; sometimes you can trace it up to a place where it is less faded and what looked like a pink wire you can then see actually was originally red. Also, is yours a factory A/C truck? And what year and model?

07-14-2016, 09:19 PM	#5
70STOVEBOLT Senior Member Join Date: Jun 2005 Location: Winona Lake, IN Posts: 6,414	Re: Help Me With These Original Connections The second pic is definitely for TH400 kickdown switch. __________________ 70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Sliding Rear Window Power Windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear

07-14-2016, 09:57 PM	#6
Gromit Registered User Join Date: Jul 2015 Location: Central Coast, CA Posts: 501	Re: Help Me With These Original Connections Here is the photo of the closest thing I could come up with - though like I wrote earlier the one or two wire colors differ from yours so I'm not sure. I hope I'm recalling correctly that was the horn relay whatever brain cell of mine was storing that seems to be missing at the moment. My truck has the TH350 so that would explain why I don't recognize what 70Stovebolt identified as the electric kickdown wire connector - mine has the mechanical kickdown instead. Attached Images

07-15-2016, 01:45 AM	#7
chewychevy67 Senior Member Join Date: Jan 2010 Location: Here Posts: 5,551	Re: Help Me With These Original Connections I believe the first picture is the connector for a anti- diesel relay. It's part of the a/c harness in 71 72 I believe. Attached Images

07-15-2016, 02:35 AM	#8
Gromit Registered User Join Date: Jul 2015 Location: Central Coast, CA Posts: 501	Re: Help Me With These Original Connections Awesome skills ChewyChevy! That looks right on.. I'm glad to know too because neither of those connectors or wires are on my '70 so I can stop wondering..

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