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03-23-2021, 08:53 PM
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#1 |
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Senior Member
 
Join Date: Jun 2005
Location: Winona Lake, IN
Posts: 6,207
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Dark brown/white wire
I have searched and searched the website and looked at the wiring diagram but I cannot find what this wire goes to. It comes out of the engine side bulkhead connector and is not hot, key on or off or accessory. Anybody know what it’s for? I have it tucked into the firewall gutter in the pic.
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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 Power windows Power Locks Coming soon: EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 |
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03-24-2021, 11:18 AM
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#2 |
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Registered User
Join Date: Jul 2019
Location: Beebe, AR
Posts: 2,393
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Re: Dark brown/white wire
Interesting. I just consulted my wiring diagram for V8 67-72 Chevy trucks and see no brown/white wire listed on the engine side bulkhead connector. The only brown/white I can find on the entire diagram originates at the key switch and runs to the bulkhead connector inside the cab but nothing on the engine side.
Hopefully someone will chime in here.
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1967 C10 1980 Jeep CJ5 2020 Toyota 4Runner 2020 Toyota CH-R 2020 Acura MDX |
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03-24-2021, 01:37 PM
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#3 |
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Senior Member
Join Date: Jun 2005
Location: Winona Lake, IN
Posts: 6,207
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Re: Dark brown/white wire
My truck is a 1970 C/10 but this harness came from a 1972 C30, not sure if that matters or not.
__________________
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 Power windows Power Locks Coming soon: EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 |
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03-24-2021, 04:41 PM
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#4 |
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Senior Member
Join Date: Mar 2003
Location: Colfax-California
Posts: 8,383
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Re: Dark brown/white wire
When does it get 12v?
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03-24-2021, 09:44 PM
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#5 |
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Senior Member
Join Date: Jun 2005
Location: Winona Lake, IN
Posts: 6,207
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Re: Dark brown/white wire
I checked it with the key on, key off, key turned to accessory, no voltage. I don't think there is power coming from the fuse block to this wire. The under dash harness is from a 1970 truck.
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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 Power windows Power Locks Coming soon: EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 |
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03-25-2021, 12:58 AM
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#6 |
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Senior Member
Join Date: Mar 2003
Location: Colfax-California
Posts: 8,383
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Re: Dark brown/white wire
try the headlamp switch
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03-25-2021, 12:21 PM
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#7 |
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Registered User
Join Date: Jan 2007
Location: Puyallup, WA
Posts: 1,661
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Re: Dark brown/white wire
My truck has one of these, as well as the TCS wiring, and they are not the same. Also, the TCS wiring does not get routed in the firewall gutter. Here's a thread that may help. I believe post #14 is correct...the pics in the last post are of the TCS wires and they are different than your pic. http://67-72chevytrucks.com/vboard/s....php?p=6919062
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72 C10 lwb fleetside -stock 350/350 combo |
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