Towed vehicle wiring - The 1947 - Present Chevrolet & GMC Truck Message Board Network

walker · 11-22-2005, 12:22 AM

I need to tow My Scout with my '67. I have the four flat already wired on my truck but need to wire my Scout to be towed. What are some methods I might use to wire it up?

**passthebuck** · 11-22-2005, 01:29 AM

I'm not sure how the scout wiring works exactly under the hood, but I can tell ya what I did just a few weeks ago. Our trucks have a plug going through the firewall that the main harness plugs into. That wire goes to the back of the truck that hooks up to tail lights & all that. I'll assume that the Scout has the same? I got a roll of Grote wire & soldered a trailer plug on one end & some male spade connectors on the other. I unpluged the plug that goes through the firewall & pulled it into the engine compartment. I then plugged it all together, ran the wire out through the grill & voila. I towed it that way for the provincial safety inspection & saved on one-day licensing fees. See attached pic. Yes, I know, no safety chains! I'm guilty!

chevymad · 11-22-2005, 01:36 AM

For a permanent setup, you use diodes on the towed vehicle to keep its electrical system seperated, yet use its own lights. I find it much easier to just get a set of magnetic lights though.

walker · 11-22-2005, 07:40 PM

I am thinking that the magnetic lights are looking better all the time. Thanks for the input, as I may wire this permanently later.

Longhorn Man · 11-22-2005, 11:16 PM

I did mine up like passthebuck, then I took a plug from the inside of the cap portion of that harness, and spliced the 4 flat harness to it. So now when i use a tow bar, all I have to do is pop the hood of the towed truck, unplug the harness on the firewall, and plug this into it, and the other end to the towing vehicle in the 4 flat plug. Works sweet, and is stupid simple.

BobbyK · 11-23-2005, 12:50 PM

Hey PASSTHE BUCK,don't worry about saftey chains...that trailer wiring is stronger than you think!

GO HOMESTAR RUNNER!

11-22-2005, 12:22 AM	#1
walker Registered User Join Date: Jul 2003 Location: north of Phx AZ about 30 miles Posts: 698	Towed vehicle wiring I need to tow My Scout with my '67. I have the four flat already wired on my truck but need to wire my Scout to be towed. What are some methods I might use to wire it up? __________________ Andy,Phx AZ '67 C-10 (Ahhh, done at last. Well there is that disk front end I want to put in and...) "23 C-Cab-sold '48 Ford 8N tractor(still working) '67 Scout(Now on the road) '70 MG B.-sold

11-22-2005, 01:29 AM	#2
passthebuck Sisyphus was my mentor! Join Date: Sep 2002 Location: Carleton Place, Ontario CANADA Posts: 984	Re: Towed vehicle wiring I'm not sure how the scout wiring works exactly under the hood, but I can tell ya what I did just a few weeks ago. Our trucks have a plug going through the firewall that the main harness plugs into. That wire goes to the back of the truck that hooks up to tail lights & all that. I'll assume that the Scout has the same? I got a roll of Grote wire & soldered a trailer plug on one end & some male spade connectors on the other. I unpluged the plug that goes through the firewall & pulled it into the engine compartment. I then plugged it all together, ran the wire out through the grill & voila. I towed it that way for the provincial safety inspection & saved on one-day licensing fees. See attached pic. Yes, I know, no safety chains! I'm guilty! Attached Images __________________ passthebuck #5642 -TWO 1967 GMC 910's. One with L6/3-on-the tree and the other with 355 w/435hp & a 700r4. -a 2013 Honda Civic as my "sensible" car Last edited by passthebuck; 11-22-2005 at 01:37 AM.

11-22-2005, 01:36 AM	#3
chevymad Registered User Join Date: Jan 2001 Location: skamokawa, WA, USA Posts: 527	Re: Towed vehicle wiring For a permanent setup, you use diodes on the towed vehicle to keep its electrical system seperated, yet use its own lights. I find it much easier to just get a set of magnetic lights though. __________________ 70 C10 long fleet, 355/200 4r, 6 lug disc conversion, 3" drop 70 gmc changed to 67/8 chevy, 454 with voodoo cam, th400, all 74 running gear.. in progress

11-22-2005, 07:40 PM	#4
walker Registered User Join Date: Jul 2003 Location: north of Phx AZ about 30 miles Posts: 698	Re: Towed vehicle wiring I am thinking that the magnetic lights are looking better all the time. Thanks for the input, as I may wire this permanently later. __________________ Andy,Phx AZ '67 C-10 (Ahhh, done at last. Well there is that disk front end I want to put in and...) "23 C-Cab-sold '48 Ford 8N tractor(still working) '67 Scout(Now on the road) '70 MG B.-sold

11-22-2005, 11:16 PM	#5
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: Towed vehicle wiring I did mine up like passthebuck, then I took a plug from the inside of the cap portion of that harness, and spliced the 4 flat harness to it. So now when i use a tow bar, all I have to do is pop the hood of the towed truck, unplug the harness on the firewall, and plug this into it, and the other end to the towing vehicle in the 4 flat plug. Works sweet, and is stupid simple.

11-23-2005, 12:50 PM	#6
BobbyK Registered User Join Date: May 2000 Location: Petrolia,Ontario,Canada but working in Port Huron,Mi. Posts: 1,771	Re: Towed vehicle wiring Hey PASSTHE BUCK,don't worry about saftey chains...that trailer wiring is stronger than you think! GO HOMESTAR RUNNER! __________________ 71 blazer,350SBC,approx.375HP,700R4,factory GM TPI.Dual electric fans,33x12.5x15 ATR on stock suspension. Petrolia,Ontario,Canada but working in Port Huron,MI. See ALL my Blazer pic's HERE

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